超伝導線材の電流輸送特性の解明
キーワード:電界電流特性
2017.04~2022.04.
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研究者情報
基本 情報 |
研究 活動 |
教育 活動 |
社会 活動 |
主な研究テーマ |
従事しているプロジェクト研究 |
高温超伝導線材の実用環境下における電流輸送特性の非破壊・非接触計測法の開発
2023.04~2025.03, 代表者:呉 澤宇, 九州大学, 日本学術振興会(日本).
2023.04~2025.03, 代表者:呉 澤宇, 九州大学, 日本学術振興会(日本).
高温超伝導線材の10桁の電界領域に亘る電流輸送特性のオペランド計測とモデリング
2022.10~2024.03, 代表者:呉 澤宇, 九州大学, 日本学術振興会(日本)
高温超伝導テープ線材は定常高磁界の発生や交流モーター等への応用が期待されている。しかしながら、幅広のテープ形状に起因して、コイルによる磁場発生時に超伝導テープ面内に大きな遮蔽電流が誘起される。遮蔽電流の挙動は、線材の電流輸送特性:電界―電流密度(E-J)特性に帰結されるが、運転時の線材に誘起される電界は10-12 ~ 10-2 V/mと10桁に亘るほど広く、温度や磁界、更に磁界の印加角度なども大きく異なることから、線材の輸送可能な電流密度が複雑に変化する。本研究では、実用環境下の特性を計測すると共に、物理モデルを導入した深層学習によってE-J特性の高精度なモデリングを実現しようとするものである。.
2022.10~2024.03, 代表者:呉 澤宇, 九州大学, 日本学術振興会(日本)
高温超伝導テープ線材は定常高磁界の発生や交流モーター等への応用が期待されている。しかしながら、幅広のテープ形状に起因して、コイルによる磁場発生時に超伝導テープ面内に大きな遮蔽電流が誘起される。遮蔽電流の挙動は、線材の電流輸送特性:電界―電流密度(E-J)特性に帰結されるが、運転時の線材に誘起される電界は10-12 ~ 10-2 V/mと10桁に亘るほど広く、温度や磁界、更に磁界の印加角度なども大きく異なることから、線材の輸送可能な電流密度が複雑に変化する。本研究では、実用環境下の特性を計測すると共に、物理モデルを導入した深層学習によってE-J特性の高精度なモデリングを実現しようとするものである。.
研究業績 |
主要原著論文
主要学会発表等
1. | KISS,Takanobu; TAKARABE,Yusuke; SHIGEOKA,Shun; WU,Zeyu; IMAMURA,Kazutaka; HIGASHIKAWA,Kohei; YOKOE,Daisaku; ITOH,Taishi; KATO,Takeharu; MIURA,Hideaki; HATTORI,Taisuke; OYA,Masayoshi; TONOOKA,Shun, Hybrid Microscopy to Clarify Failure Mechanisms of REBCO Tapes in Meter-Class Pancake-Coils, 27th International Conference on Magnet Technology (MT27), 2021.11. |
2. | 木須 隆暢, 今村 和孝, Natthawirot Somjaijaroen, 呉 澤宇, 東川 甲平, リール式磁気顕微鏡観察における深層学習を用いた画像認識による長尺高温超伝導テープ線材中の局所欠陥の自動検出, 第69回応用物理学会春季学術講演会, 2022.03. |
3. | Takanobu Kiss, Peihong Zhang, Yuhsuke Oda, Keita Kawasaki, Zeyu Wu, Kenji Suzuki, Kohei Higashikawa, Shigeru Sato, Novel continuous bending test method applicable to a small diameter less than 10 mm and a development of flexible REBCO joints, 10th MEM Mechanical and Electromagnetic Properties of Composite Superconductors, 2022.07, In this study, bending properties of REBCO tapes and their joints have been investigated by a novel continuous bending property test method of small diameter, and we have succeeded in realizing excellent flexible joining to retain the initial Ic of 95 % or more at the minimum bending diameter of 6 mm. REBCO wire is much superior to BSCCO wire on bending property because of the thin film deposited on the thin substrate. However, the bending test of small diameter has not been sufficiently investigated due to the restriction of the size of the jig, etc. In this study, we proposed a novel bending test method in which REBCO tapes were bent in a loop. Based on image analysis of the loops, we found that the shape of the loop can be described by the clothoid curve in which the curvature linearly changes along the trajectory. This allows us to control the loop diameter by the sample length. Experimental results showed good agreement with that of theoretical analysis. Applying this bending test method, we examined bending characteristics of REBCO tape and bonded samples. While the critical bending diameter was 12 mm in the REBCO tape strand, the bonded samples showed excellent flexibility which surpassed the characteristics of the strand as the position of superconducting layer approaches closer to the neutral line in the bonded sample. We have achieved 6 mm in diameter as the minimum value in the joint. Acknowledgements: This work was supported by JSPS KAKENHI Grant Number JP19H05617.. |
4. | 木須 隆暢, N. Somjaijaroen, 呉 澤宇, 寺崎 拓也, 今村 和孝, 東川 甲平, 深層学習を用いた磁気顕微画像解析による高温超伝導テープ線材の電流阻害因子の可視化, 第83回応用物理学会秋季学術講演会, 2022.09. |
5. | Takanobu Kiss, Natthawirot Somjaijaroen, Mingyang Gao, Kazutaka Imamura, Zeyu Wu, Kohei Higashikawa, Advancement of magnetic microscopy by introducing deep-learning based image analyses for high performance characterization of REBCO coated conductors, 2022 The Applied Superconductivity Conference (ASC2022), 2022.10. |
6. | 木須 隆暢, SOMJAIJAROEN Natthawirot, 今村 和孝, 寺崎 拓也, 呉 澤宇, 東川 甲平, 機械学習を用いた磁気顕微鏡観察による長尺REBCO線材内の局所Ic不均一性の検出:画像分類と物体検出の比較, 2022年度秋季低温工学・超電導学会研究発表会, 2022.12. |
7. | Takanobu Kiss, Natthawirot Somjaijaroen, Kazutaka Imamura, Takuya Terazaki, Zeyu Wu, Kohei Higashikawa, [Invited] Automatic Detection of Local Inhomogeneity in REBCO Coated Conductor by High-Speed Reel-to-Reel Scanning Hall Probe Magnetic Microscopy Coupled with Machine Learning Based Image Analysis(招待講演), 2022 International Forum on Applied Superconductivity and Magnetism, 2022.12. |
8. | 木須隆暢, Natthawirot Somjaijaroen, 呉 澤宇, 今村和孝, 寺﨑拓也, 東川甲平, 機械学習画像解析を導入したリール式高速磁気顕微鏡観察による長尺REBCO高温超伝導線材内の局所欠陥ドメインの自動検出, 令和5年電気学会全国大会, 2023.03. |
9. | 木須 隆暢,張 佩宏,川﨑 啓太,小田 祐輔,呉 澤宇,東川 甲平,鈴木 賢次, 希土類系高温超伝導コート線材のループ状曲げ特性解析と新規連続曲げ試験法の検討, 2023年第70回応用物理学会春季学術講演会, 2023.03. |
10. | 呉 澤宇, 東川 甲平, 木須 隆暢, 磁化緩和測定に基づいた高温超伝導線材の電流輸送特性の非接触・非破壊評価法, 令和5年度九州パワーアカデミー総会およびフォーラムプログラム, 2023.06. |
11. | Zeyu Wu, Kohei Higashikawa, Natthawirot Somjaijaroen, Kazutaka Imamura, Takanobu Kiss, High-resolution Detection of Localized Jc inhomogeneity in long-length REBCO Coated Conductor by Combining Magnetic Microscopy and Deep Learning-based Object Detection, MT-28 International Conference on Magnet Technology, 2023.09. |
12. | Zeyu Wu, K. Higashikawa, A. Queraltó, C. Pop, K. Gupta, X. Obradors, T. Puig, T. Kiss, Spatially Resolved Analysis of Local Jc in a Combinatorial Inkjet Printing for Transient LiquidAssisted Growth Chemical Solution Deposition, The 11th Asian Conference on Applied Superconductivity and Cryogenics / 3rd Asian International Cryogenic Materials Conference(ACASC-Asian ICMC 2023), 2023.10. |
13. | Zeyu Wu, Kohei Higashikawa, Natthawirot Somjaijaroen, Kazutaka Imamura,Takanobu Kiss, Analysis of Current Blocking Obstacles in Long-length Coated Conductors by the Combination of High-Throughput Reel-to-Reel Magnetic Microscopy and Machine Learning, The 36th International Symposium on Superconductivity (ISS2023) , 2023.11. |
14. | 呉 澤宇, Somjaijaroen Natthawirot, 東川 甲平, 木須 隆暢, 機械学習を導入したリール式磁気顕微鏡観察による長尺REBCO線材の局所不均一性の解析:Classification modelとObject detection modelの比較, 2023年度秋季第106回低温工学・超電導学会研究発表会, 2023.12. |
15. | 呉 澤宇, 今村 和孝, 東川 甲平, 木須 隆暢, リール式高速磁気顕微鏡観察と機械学習の融合によるREBCOコート線材の電流阻害因子の解析:線材作製プロセスの違いによる比較検討, 2024年第71回応用物理学会春季学術講演会, 2024.03. |
16. | T.Kiss, On the possibility of an alternative explanation of vortex glass-liquid transition (Invited), International Seminar on Superconducting State and Transport Phenomena in High Magnetic Fields,, 1995.05. |
17. | T. Kiss, K. Yamafuji, Glass-Liquid Transition and Flux Pinning in High T$_{c}$ Superconductors (invited), Int. Workshop on New Phys. in the Vortex State of the High Temp. Superconductors, 1996.04. |
18. | T. Kiss, T. Nakamura, M. Takeo, F. Irie, K. Yamafuji, Transport Characteristics in High T$_{c}$ Superconductors with Pin Fluctuation under The Influence of Thermal Agitation (invited), 8th Int. Workshop on Critical Current in Superconductors, 1996.05. |
19. | 木須 隆暢, 高温超伝導体の磁束融解相転移と磁束ピンニング(invited), 応用物理学会超伝導分科会 第13回研究会, 1996.06. |
20. | 木須隆暢, ランダムピン媒質中における磁束ピン止め特性 (invited), 平成8年度基礎理論関連動向調査会, 1997.01. |
21. | T. Kiss, T. Matsushita, F. Irie, Relationship among flux depinning, irreversibility and phase transition in a disordered HTS material (invited), The 9th International Workshop on Critical Currents (IWCC9-99), 1999.07. |
22. | T. Kiss, Transport $E$-$J$ Characteristics in HTS(invited), The International Workshop on Critical Currents and Applications of HTS (IWCCA-HTS, Satellite Conf. to ISS 200), 2000.10. |
23. | T. Kiss, S. Nishimura, M. Inoue, H. Okamoto, Y. Sumiyoshi, T. Matsushita, Y. Iijima, K. Kakimoto, T. Saitoh, S. Awaji, K. Watanabe, Y. Shiohara, Critical current properties of high Tc superconducting tapes (Invited), US/Japan Workshop on Application of high temperature superconducting coil for fusion plasma experimental devices, 2002.02. |
24. | T. Kiss, M. Inoue, T. Kuga, M. Ishimaru, S. Egashira, T. Ohta, K. Imamura, M. Yasunaga, M. Takeo, T. Matsushita, Y. Iijima, K. Kakimoto, T. Saitoh, S. Awaji, K. Watanabe, Y. Shiohara, Critical currents in YBCO superconducting tapes (Invited), MRS Superconductivity Workshop: International Workshop on Processing and Applications of Superconductors, 2002.08. |
25. | 木須 隆暢, 超伝導材料の臨界電流評価(Invited), 低温工学協会東北・北海道支部 第7回 超電導・若手セミナー, 2002.09. |
26. | T. Kiss, M. Inoue, T. Kuga, M. Ishimaru, S. Egashira, T. Ohta, K. Imamura, M. Yasunaga, M. Takeo, T. Matsushita, Y. Iijima, K. Kakimoto, T. Saitoh, S. Awaji, K. Watanabe, Y. Shiohara, Critical current properties in HTS tapes (Invited), International Symposium on Superconductivity(ISS) 2002, 2002.11. |
27. | T. Kiss, M. Inoue, T. Kuga, M. Ishimaru, S. Egashira, T. Ohta, K. Imamura, M. Yasunaga, M. Takeo, T. Matsushita, Y. Iijima, K. Kakimoto, T. Saitoh, S. Awaji, K. Watanabe, Y. Shiohara, Current-voltage characteristics in YBCO coated IBAD tapes (Invited), MRS Fall meeting, 2002.12. |
28. | Takanobu Kiss, Critical Current Densities: Percolation and Scaling (Invited), American Physical Society March Meeting 2003, 2003.03. |
29. | 木須隆暢,井上昌睦,安永稔,今村賢司,大田崇文,飯島康裕,柿本一臣,斎藤隆, YBCO線材における臨界電流特性の局所観察と巨視的電界—電流密度特性, 第68回低温工学・超伝導学会, 2003.05. |
30. | 木須隆暢, Y系酸化物超伝導線材の臨界電流特性 (invited), 応用物理学会超伝導分科会主催第27回研究会,2003年6月, 2003.06. |
31. | Takanobu Kiss, Transport E-J Characteristics in YBCO Coated Conductors (invited), The 11th International Workshop on Critical Currents in Superconductors (11th IWCC), 2003.07. |
32. | T. Kiss, M. Inoue, M. Yasunaga, K. Imamura, T. Ohta, H. Tokutomi, Y. Tsuda, H. Sawa and M. Takeo, Current Transport Properties in a YBCO Coated IBAD Tape Made by TFA-MOD Process, International Workshop on Coated Conductors for Application 2003 (CCA 2003), 2003.09. |
33. | T. Kiss, M. Yasunaga, Y. Murakami, H. Tokutomi, R. Okamoto, M. Inoue, M. Takeo, Non-uniform electric field distribution around a planar defect in YBCO film and its nfluence on thermal instability, 6th European Conference on Applied Superconductivity, 2003.09. |
34. | T. Kiss, M. Inoue, S. Egashira, M. Yasunaga, H. Tokutomi, M. Takeo, Y. Iijima, K. Kakimoto and T. Saitoh, Imaging of the local dissipation in YBCO coated tapes, Cryogenic Engineering Conference and International Cryogenic Materials Conference 2003, 2003.09. |
35. | Takanobu Kiss, Spatially resolved measurements of dissipative state in HTS tapes and films by low temperature scanning laser microscopy (invited), The 11th Japan-US Workshop on High-Tc Superconductors, 2003.10. |
36. | Takanobu Kiss, Fundamental Characteristics, 3rd meeting for US-Japan Collaboration Project of AC Loss, 2003.10. |
37. | 木須隆暢, 機械歪の影響下におけるBi-2223銀シース多芯線材のE-J特性 (invited), 低温工学協会第4回材料研究会・低温北支部合同研究会,2003年10月, 2003.10. |
38. | 木須隆暢,安永稔,徳富英明,井上昌睦,竹尾正勝, エピタキシャルYBCO膜中の単一欠陥近傍の電界集中:低温レーザ顕微鏡によるイメージングと解析解との定量的比, 第69回低温工学・超伝導学会, 2003.12. |
39. | T. Kiss, M. Inoue, M. Yasunaga, K. Imamura, T. Ohta, H. Tokutomi, Y. Tsuda, H. Sawa, M. Takeo, Y. Iijima, K. Kakimoto, T. Saitoh, Y. Tokunaga, T. Izumi and Y. Shiohara, Current transport properties in YBCO coated IBAD tapes,, Asian Conference on Applied Superconductivity and Cryogenics, 2003.12. |
40. | Takanobu Kiss, Spatially resolved measurements of inhomogeneous dissipation in HTS conductors (Invited), 2004 International Cryogenic Materials Conference (ICMC) topical workshop, 2004.02. |
41. | 木須隆暢, 安永稔, 徳富英明, 井上昌睦, 竹尾正勝, YBCO膜中の単一面状欠陥近傍の電界集中の計測と解析解との比較検討, 2004年(平成16年)春季 第51回応用物理学関係連合講演会, 2004.03. |
42. | T. Kiss, M. Inoue, H. Tokutomi, R. Okamoto, T. Shoyama, T. Imamura, Y. Iijima, K. Kakimoto, T. Saitoh, Y. Tokunaga, T. Izumi, and Y. Shiohara, Low temperature scanning laser microscopy of YBCO coated IBAD tapes, 106th Annual Meeting, The American Ceramic Society, 2004.04. |
43. | 木須隆暢,岡本亮太郎,小柳智史,井上昌睦,竹尾正勝,飯島康裕,柿本一臣,斎藤隆,塩原融, 低温走査レーザ顕微鏡による銀安定化層を有するYBCO線材内の不均一性の可視化, 第70回2004年度春季低温工学・超電導学会, 2004.05. |
44. | 木須 隆暢, DOE 2004 Annual Peer ReviewにおけるY系線材超電導特性評価に関する研究動向 (Invited), Superconductivity for Electric Systems 2004 Annual Peer Review 報告会, 2004.08. |
45. | 木須隆暢,井上昌睦,今村和孝,小柳智史,竹尾正勝,飯島康裕,柿本一臣,斎藤隆,塩原融, 走査SQUID磁気顕微鏡によるYBCO高温超伝導線材内の量子化磁束観察, 第65回応用物理学会学術講演会, 2004.09. |
46. | 木須 隆暢, 酸化物超電導の基礎 (Invited), 低温工学協会主催 第16回低温工学サマーセミナー, 2004.09. |
47. | 木須 隆暢, イットリウム系次世代超伝導線材の特性評価技術開発 (Invited), 低温工学協会主催 2004年度第5回冷凍部会例会「超伝導関連研究の最新トピックス」, 2004.09. |
48. | T. Kiss, M. Inoue, H. Tokutomi, R. Okamoto, T. Shoyama, T. Imamura, Y. Iijima, K. Kakimoto, T. Saitoh, J. Matsuda, T. Izumi, and Y. Shiohara, Fundamental characteristics, US-Japan Collaboration: AC Loss Workshop, 2004.09. |
49. | Takanobu Kiss, Current Transport Properties in High-Temperature Superconducting Composites (Invited Keynote), The XXI Regional Conference and Workshop on Solid State Science & Technology, 2004.10. |
50. | T. Kiss, M. Inoue, M. Yasunaga, H. Tokutomi, Y. Iijima, K. Kakimoto, T. Saitoh, Y. Tokunaga, T. Izumi, Y. Shiohara, Low temperature scanning laser microscopy of YBCO coated IBAD tapes, Applied Superconductivity Conference, ASC 2004, 2004.10. |
51. | Takanobu Kiss, Microanalysis of superconducting properties in YBCO coated conductors (Invited), International workshop on coated conductors for applications, CCA 2004, 2004.11. |
52. | Takanobu Kiss, Recent topics on advances characterization of transport current in coated conductors (Invited), The 17th International Symposium on Superconductivity (ISS2004), 2004.11. |
53. | T. Kiss, M. Inoue, H. Tokutomi, S. Koyanagi, T. Shoyama, M. Takeo, Y. Shiohara, Nonlinear current flow around transverse defects in YBCO thin film, The 17th International Symposium on Superconductivity (ISS2004), 2004.11. |
54. | T. Kiss, M. Inoue, H. Tokutomi, T. Shoyama, S. Koyanagi, K. Imamura, M. Takeo, J. Matsuda, T. Izumi, Y. Shiohara, Influence of current limiting obstacles and nonlinear current flow in YBCO coated conductors, Asian Conference 2004 on Applied Superconductivity and Cryogenics (ACASC2004), 2004.12. |
55. | 木須隆暢, YBCO線材の20K特性(Invited), 低温工学協会 2004年度第4回材料研究会, 2005.03. |
56. | Takanobu Kiss, Spatially resolved measurements of local electromagnetic properties in YBCO coated conductors, US-Japan collaboration project on AC loss study of HTS conductor, 2005.03. |
57. | 木須隆暢,井上昌睦,徳富英明,庄山俊弘,小柳智史,今村和孝,飯島康裕,柿本一臣,齋藤隆,衣斐顕,渡部智則,和泉輝郎,山田穣,塩原融,淡路智,渡辺和雄, YBCO Coated 線材の磁界下における電流輸送特性 (Invited), 第1回ナノ構造超伝導体の渦糸ピンニングに関するCRESTワークショップ, 2005.03. |
58. | Takanobu Kiss, Imaging and Characterization of Nonuniform Current Transport in YBCO Coated Tapes (invited), MRS Spring meeting, 2005.04. |
59. | 木須隆暢,井上昌睦,今村和孝,徳富英明,庄山俊弘,揖斐 顕,渡部智則,山田 穣,塩原 融, 高磁界下におけるYBCO/IBAD線材内の磁束フロー損失の可視化, Imaging of non-uniform flux flow dissipation in YBCO/IBAD coated conductor under the influence of high magnetic field, 第72回 2005年度春季 低温工学・超電導学会, 2005.05. |
60. | Takanobu Kiss, Current transport properties in YBCO coated conductors under the influence of magnetic field and mechanical strain (Invited), 3rd Workshop on Mechano-Electromagnetic Property of Composite Superconductors (MEM05), 2005.07. |
61. | Takanobu Kiss, Laser imaging of non-uniform flux flow dissipation in YBCO coated conductors under the influence of external magnetic field (Invited), PacRim6 Symposium, Processing of High Temperature Superconductors, 2005.09. |
62. | Takanobu Kiss, Influence of Current Limiting Obstacles in YBCO Coated IBAD Conductors (Invited), The 12th US-Japan workshop on high performance superconductors, 2005.10. |
63. | Takanobu Kiss, Visualizing flux flow dissipation and current limiting obstacles in YBCO coated IBAD conductors (Invited talk), The 18th International Symposium on Superconductivity (ISS 2005, 2005.10. |
64. | 木須 隆暢,井上 昌睦,庄山 俊弘,藤原 隆,Z. Zulkifli,三井 大輔,今村 和孝,竹尾 正勝,大松 一也,衣斐 顕,山田 穣,塩原 融, レーザ誘起熱電効果を用いたHTS結晶粒の可視化法の提案, Novel visualizing technique for HTS grain structure in coated conductors by use of laser induced thermoelectric voltage, 第73回 2005年度秋季 低温工学・超電導学会, 2005.11. |
65. | 木須隆暢, 温度、磁界、機械歪の影響下における イットリウム系高温超電導線材の電流輸送特性 (Invited), 東北大学金属材料研究所、強磁場超伝導材料研究センター懇談会, 2005.11. |
66. | Takanobu Kiss, Combined multiple analysis of coated conductors for the understanding of current limiting mechanism (Invited talk), Seminar at Argonne National Laboratory, 2005.12. |
67. | Takanobu Kiss, Current limiting mechanism in IBAD based YBCO coated conductor (Invited talk), International Workshop on Coated Conductors for Applications (CCA), 2005.12. |
68. | Takanobu Kiss, Imaging and characterization of current transport in IBAD based YBCO coated conductors (Invited talk), Nano-Virtual-Labs Joint Workshop on Superconductivity (NVLS2005), 2005.12. |
69. | T. Kiss, M. Inoue, S. Koyanagi, T. Nakamura, K. Imamura, A. Ibi, Y. Yamada, Y. Shiohara, Current transport and dissipation in IBAD based coated conductors under the influence of local disorder, Asian Conference 2005 on Applied Superconductivity and Cryogenics, ACASC2005, 2005.12. |
70. | Takanobu Kiss, Development of multiple characterization techniques for the understanding of current limiting mechanism in HTS coated conductors (invited), Seminar at Korea Electrotechnology Research Institute, 2005.12. |
71. | 木須 隆暢, イットリウム系次世代超伝導線材の電流輸送特性(依頼講演 invited), 第7回先進超電導線材の製造技術と特性に関する調査専門委員会(電気学会主催), 2005.12. |
72. | T. Kiss, Processing and characterization of CC: Developments in Japan (Invited talk), The 2nd topical workshop of SCENET and the 11th CHEM-HTS workshop: Superconductivity, the Presnet and the Future, Illetas-Calvia, Mojorca, Spain, March 16-18, 2006, 2006.03. |
73. | 木須隆暢,井上昌睦,庄山俊弘,小柳智史,三井大輔,中村知也,今村和孝,衣斐 顕,山田 穣,塩原 融, YBCO/IBAD線材における臨界電流制限因子, 2006年(平成18年)春季 第53回応用物理学会関係連合講演会, 2006.03. |
74. | T. Kiss, Development of multiple characterization techniques for the understanding of current limiting mechanism in coated conductors (Invited talk), Stanford-Wisconsin Workshop on Coated Conductors, 2006.04. |
75. | T. Kiss, Current limiting obstacles in IBAD based YBCO coated conductors: Finding a needle in a pile of hay (Invited talk), MRS 2006 Spring Meeting, 2006.04. |
76. | 木須隆暢,井上昌睦,小柳智史,中村知也,庄山俊弘,今村和孝(九大);衣斐顕,宮田成紀,山田穣,塩原融(SRL), 低温走査レーザ顕微鏡と走査SQUID 顕微鏡の連携によるYBCO 線材内の局所I-V 特性評価; Local I-V characteristic in YBCO coated conductor estimated by the combination of low temperature scanning laser microscopy and scanning SQUID microscopy, 第74回2006年度春季 低温工学・超電導学会, 2006.05. |
77. | T. Kiss, Influence of Spatial Inhomogeneity of ac Susceptibility Technique to the Study of High-Temperature Superconductors, CCA (Organized by the European Network SCENET (Working Group Coated Conductors, with support of Working Group High Critical Current Superconductors)), 2006.07. |
78. | M. Inoue, T. Kiss, D. Mitsui, T. Nakamura, T. Fujiwara, S. Awaji, K. Watanabe, A. Ibi, S. Miyata, Y. Yamada, Y. Shiohara, Current transport properties of 200A-200m-class IBAD YBCO coated conductors over wide range of magnetic field and temperature, Applied Superconductivity Conference 2006, 2006.09. |
79. | T. Kiss, M. Inoue, T. Shoyama, S. Koyanagi, D. Mitsui, T. Nakamura, K. Imamura, A. Ibi, Y. Yamada, Y. Shiohara, Visualizing transport properties in IBAD based YBCO coated conductors by use of combined multiple analysis, Applied Superconductivity Conference 2006, 2006.09. |
80. | T. Kiss, Local inhomogeneity in IBAD based YBCO coated conductors (Invited talk), Materials Science and Technology 2006, 2006.10. |
81. | T. Kiss, Critical currents in YBCO coated conductors: The influence of spatial non-uniformity and flux pinning (Invited talk), The 19th International Symposium on Superconductivity (ISS 2006), 2006.10. |
82. | M. Inoue, K. Motoyama, T. Nakamura, T. Fujiwara, D. Mitsui, T. Kiss, S. Awaji, K. Watanabe, A. Ibi, K. Takahashi, S. Miyata, Y. Yamada, Y. Shiohara, Enhancement of Critical Current in YBCO Coated Conductors in Association with C-Axis Correlated Artificial Pinning Centers, The 19th International Symposium on Superconductivity (ISS 2006), 2006.10. |
83. | T. Nakamura, M. Inoue, T. Kiss, T. Watanabe, N. Kashima, M. Mori, S. Nagaya, A. Ibi, Y. Yamada, Y. Shiohara, Spatially Resolved Measurement of Current Flow in Multi-Filamentary YBCO Tape Wires,Tapes and Characterization, The 19th International Symposium on Superconductivity (ISS 2006), 2006.10. |
84. | 木須 隆暢,井上 昌睦,庄山 俊弘,三井 大輔,藤原 隆,Z. Zulkifli,今村 和孝,竹尾 正勝,衣斐 顕,山田 穣,塩原 融, YBCO/IBAD線材の臨界電流制限機構の解明, Current limiting mechanism in YBCO coated IBAD conductors, 第75回 2006年度秋季 低温工学・超電導学会, 2006.11. |
85. | T. Kiss, Research and development on advanced conductors and power applications in Japanese superconductivity national projects (Invited talk), Cermae, Energy Challenges: Materials for energy production, storage, distribution and efficiency, 2006.12. |
86. | T. Kiss, Development of novel characterization techniques for basic understanding of current limiting mechanisms in coated conductors (Invited lecture), Invited lecture at Institut de Ciencia de Materials de Barcelona (ICMAB), Universitat Autonoma de Barcelona, 2006.12. |
87. | Z. Zulkifli, T. Fujiwara, T. Nakamura, T. Kiss, K. Enpuku, N. Kashima, M. Mori, S. Nagaya, A. Ibi, Y. Yamada, Y. Shiohara, Spatial dissipation length and local Jc estimation in YBCO coated conductor multi-filaments using low temperature scanning laser microscope, MRS 2007 Spring Meeting, 2007.04. |
88. | T. Kiss, M. Inoue, T. Nakamura, A. Matsekh, D. Mitsui, T. Fujiwara, Z. Zulkifli, K. Imamura, A. Ibi, Y. Yamada, N. Kashima, M. Mori, S. Nagaya, T. Kato, T. Hirayama, Y. Shiohara, Current carrying properties in YBCO coated conductors under the influence of current blocking obstacles and grain boundaries (invited), MRS 2007 Spring Meeting, 2007.04. |
89. | T. Kiss, M. Inoue, A. Matsekh, K. Motoyama, K. Abiru, T. Kato, T. Hirayama, Y. Iijima, T. Saitoh, N. Kashima, S. Nagaya, K. Nakao, M. Yoshizumi, T. Izumi, Y. Yamada, Y. Shiohara, Multi-scale analysis of the influence of current blocking obstacles and grain boundaries in REBCO coated conductor (Invited talk), CCA 2007, 2007.11. |
90. | Z. Zulkifli, T. Kiss, M. Inoue, K. Enpuku, T. Watanabe, N. Kashima, M. Mori, S. Nagaya, A. Ibi, Y. Yamada, Y. Shiohara, Improvement of spatial homogeneity in IBAD based YBCO coated conductors, 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
91. | T. Kiss, A. Matsekh, M. Inoue, M. Yoshizumi, Y. Kitoh, Y. Sudoh, T. Izumi, T. Kato, T. Hirayama, Y. Yamada, Y. Shiohara, Local Jc distribution and its magnetic field dependence in IBAD based YBCO coated conductor obtained by the TFA-MOD process using Ba-poor solution composition, 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
92. | T. Kiss, A. Matsekh, M. Inoue, M. Yoshizumi, Y. Kitoh, Y. Sudoh, T. Izumi, Y. Shiohara, Dissipation at a (001) tilt low angle grain boundary in MOD YBCO film under the influence of external magnetic field, 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
93. | M. Inoue, T. Kiss, M. Arkadiy, Y. Kitoh, J. Matsuda, M. Yoshizumi, Y. Yamada, T. Izumi, Y. Shiohara, Observation of current flow across a low angle grain boundary in YBa2Cu3O7-x superconducting film by scanning SQUID microscope, 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
94. | T. Kiss, Z. Zulkifli, T. Fujiwara, M. Inoue, N. Kashima, M. Mori, T. Watanabe, S. Nagaya, A. Ibi, Y. Yamada, Y. Shiohara, Detailed analysis of local Tc variation and R-T transition in a YBCO coated conductor by use of the low temperature laser scanning microscopy, 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
95. | K. Tada, J. Yoshida, K. Yamada, R. Teranishi, N. Mori, M. Mukaida, T. Kiss, M. Inoue, Y. Shiohara, T. Izumi, J. Matsuda, K. Nakaoka, Growth process of Ba-poor YBCO film fabricated by TFA-MOD process, 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
96. | J. Yoshida, K. Tada, T. Tanaka, N. Mori, K. Yamada, R. Teranishi, M. Mukaida, T. Kiss, M. Inoue, Y. Shiohara, T. Izumi, K. Nakaoka, J. Matsuda, Effect of calcinations conditions on microstructures and Jc of YBCO films fabricated by TFA-MOD method, 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
97. | A. Mitani, R. Teranishi, K. Yamada, N. Mori, M. Mukaida, T. Kiss, M. Inoue, Y. Shiohara, T. Izumi, K. Nakaoka, J. Matsuda, Effect of fabrication conditions on characteristics of SmBCO films fabricated by TFA-MOD method, 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
98. | T. Kato, Y. Sasaki, T. Hirayama, A. Ibi, S. Miyata, H. Kobayashi, Y. Yamada, S. Hanyu, K. Kakimoto, H. Fujii, Y. Iijima, T. Saitoh, N. Kashima, T. Watanabe, M. Mori, S. Nagaya, M. Inoue, T. Kiss, T. Izumi, Y. Shiohara, Nanostructural characterization of practical REBa2Cu3O7-x coated conductors by transmission electron microscopy (Invited), 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
99. | T. Kiss, M. Inoue, A. Matsekh, Z. Zulkifli, A. Ibi, S. Miyata, H. Kobayashi, Y. Yamada, M. Yoshizumi, T. Izumi, Y. Kitoh, Y. Sudoh, T. Kato, T. Hirayama, N. Kashima, M. Mori, S. Nagaya, Y. Shiohara, Microanalysis of current transport properties in Re1Ba2Cu3O7-d (RE=Y, Gd) coated conductors (Invited), 20th International Symposium on Superconductivity (ISS 2007), 2007.11. |
100. | T. Kiss, M. Inoue, M. Arkadiy, K. Abiru, M. Yoshizumi, Y. Kitoh, T. Izumi, Y. Shiohara, Current transparency at (001) tilt low angle grain boundary in YBCO bicrystalline film, MRS 2008 Spring Meeting, 2008.03. |
101. | 木須隆暢, 特性評価 (Invited), 電気学会基礎・材料・共通フォーラム「先進超電導線材の進展と今後の課題」, 2008.03. |
102. | 木須隆暢、井上昌睦、マツェックアルカディ(九州大学)、加藤丈晴、平山 司(ファインセラミックスセンター)、和泉輝郎、山田 穣、塩原 融(超電導工学研究所), 高温超電導線の電気特性の試験技術 (Invited talk), 平成20年電気学会全国大会, 2008.03, [URL]. |
103. | 木須隆暢, 超伝導線材ならびにデバイスの開発を支援する可視化技術 (Invited talk), 第55回応用物理学関係連合講演会, 2008.03. |
104. | 本山皓士,井上昌睦,木須隆暢,綾井直樹,菊地昌志,林和彦,佐藤謙一,中尾公一,田中靖三,塩原融, 加圧焼成法により作製されたBi2223線材の電流輸送特性, 第78回 2008年度春季 低温工学・超電導学会, 2008.05. |
105. | 東川甲平,木須隆暢,井上昌睦,淡路智,渡辺和雄,福島弘之,山田穣,塩原融, 長尺GdBCO線材の臨界電流特性から見た高磁界マグネットの可能性, 第78回 2008年度春季 低温工学・超電導学会, 2008.05. |
106. | 東川甲平,中村武恒,菅野未知央,式町浩二,平野直樹,長屋重夫,柁川一弘,船木和夫,井上昌睦,木須隆暢, MOCVD-YBCO導体を用いたSMESコイルの最適設計手法開発のまとめ, 第78回 2008年度春季 低温工学・超電導学会, 2008.05. |
107. | 阿比留健志,本田貴裕,井上昌睦,木須隆暢,飯島康裕,柿本一臣,齊藤隆,加藤順子,筑本知子,中尾公一,塩原融, 高温超伝導線材の通電特性評価に向けた走査型ホール素子磁気顕微鏡の開発, 第78回 2008年度春季 低温工学・超電導学会, 2008.05. |
108. | 木須隆暢,井上昌睦,阿比留健志,本田貴裕,MATSEKH Arkadiy,ZULKIFLI Zulistiana,宮田成紀,山田穣,加藤順子,筑本知子,中尾公一,塩原融, RE123線材の細線加工ならびに欠陥補修接続における通電特性, 第78回 2008年度春季 低温工学・超電導学会, 2008.05. |
109. | Arkadiy Matsekh, Spatially resolved thermal analysis and effective spatial resolution of low-temperature laser scanning microscopy, 低温工学協会九州・西日本支部 第2回 超電導ワークショップ, 2008.07. |
110. | 東川甲平, RE-123線材を適用した高磁界マグネットコイルの電磁界‐熱‐応力連成解析コード開発, 低温工学協会九州・西日本支部 第2回 超電導ワークショップ, 2008.07. |
111. | 今村和孝, RE系線材の一軸引張・圧縮歪および磁界の影響下における臨界電流特性, 低温工学協会九州・西日本支部 第2回 超電導ワークショップ, 2008.07. |
112. | 木須隆暢, 高温超電導線材の特性評価技術の開発, 低温工学協会九州・西日本支部 第2回 超電導ワークショップ, 2008.07. |
113. | 本田貴裕, 走査型ホール素子磁気顕微鏡システムの構築と高温超伝導線材の電流分布評価, 低温工学協会九州・西日本支部 第2回 超電導ワークショップ, 2008.07. |
114. | 阿比留健志, 走査型ホール素子磁気顕微鏡によるYBCO高温超伝導加工線材の電流分布評価, 低温工学協会九州・西日本支部 第2回 超電導ワークショップ, 2008.07. |
115. | A. Matsekh, T. Kiss, M. Inoue, M. Yoshizumi, Y. Sutoh, T. Izumi, Y. Shiohara, The use of LTLSM for estimating in-plane thermal diffusivity in YBCO thin films, Applied Superconductivity Conference 2008, 2008.08. |
116. | T. Kiss, A. Matsekh, M. Inoue, M. Yoshizumi, Y. Sutoh, T. Izumi, Y. Shiohara, Current transport in (001)-tilted YBCO bicrystalline film under the influence of external magnetic field, Applied Superconductivity Conference 2008, 2008.08. |
117. | M. Inoue, K. Abiru, Y. Honda, T. Kiss, K. Nakao, Y. Shiohara, Observation of current distribution in high-Tc superconducting tape by using scanning hall-probe microscope, Applied Superconductivity Conference 2008, 2008.08. |
118. | K. Higashikawa, T. Kiss, M. Inoue, T. Nakamura, H. Fukushima, Y. Yamada, Y. Shiohara, Coupled analysis method for high-field magnet coil using coated conductor based on J-E characteristics as a function of temperature, magnetic field vector and mechanical strain, Applied Superconductivity Conference 2008, 2008.08. |
119. | 木須隆暢,Arkadiy Matsekh,井上昌睦,吉積正晃,鬼頭 豊,須藤泰範,和泉輝郎,山田 穣,塩原 融, 加圧焼成法により作製されたBi2223線材の電流輸送特性とfilament配向性に関する検討, 2008年(平成20年)秋季 第69回応用物理学会学術講演会, 2008.09. |
120. | 井上昌睦,東川甲平,木須隆暢,福島弘之,衣斐顕,宮田成紀,山田穣,塩原融,淡路智,渡辺和雄, GdBCO線材の電流輸送特性の温度・磁界・磁界印加角度依存性, 2008年(平成20年)秋季 第69回応用物理学会学術講演会, 2008.09. |
121. | 本田貴裕,阿比留健志,井上昌睦,木須隆暢,加藤順子,筑本知子,中尾公一,塩原融, 走査型ホール素子磁気顕微鏡システムを用いた高温超伝導加工線材及び銀拡散接合における電流分布の評価, 第61回電気関係学会九州支部連合大会, 2008.09. |
122. | K. Abiru, Y. Honda, M. Inoue, T. Kiss, Y. Iijima, K. Kakimoto, T. Saitoh, K. Nakao, Y. Shiohara, Visualization of non-uniform current flow in coated conductors by scanning hall-probe magnetic microscopy, 21th International Symposium on Superconductivity, ISS 2007, 2008.10. |
123. | M. Inoue, T. Kiss, K. Motoyama, S. Awaji, K. Watanabe, M. Yoshizumi, Y. Yamada, T. Izumi, Y. Shiohara, Critical current property in YBCO coated conductor fabricated by improved TFA-MOD process, 21th International Symposium on Superconductivity, ISS 2007, 2008.10. |
124. | K. Higashikawa, T. Kiss, M. Inoue, K. Imamura, S. Awaji, K. Watanabe, H. Fukushima, Y. Yamada, Y. Shiohara, Significant reduction in volume, stored energy and magnetization loss of high-field magneto coil based on the improvement of critical current characteristics in GdBCO coated conductor, 21th International Symposium on Superconductivity, ISS 2007, 2008.10. |
125. | T. Kiss, M. Inoue, A. Matsekh, K. Higashikawa, K. Imamura, K. Abiru, K. Honda, S. Miyata, A. Ibi, Y. Yamada, J. Kato, N. Chikumoto, K. Nakano, M. Yoshizumi, T. Izumi, Y. Shiohara, Comprehensive analysis of current transport properties in RE1Ba2Cu3O7-d(RE=Y, Gd) coated conductors, 21th International Symposium on Superconductivity, ISS 2007, 2008.10. |
126. | MATSEKH Arkadiy,木須隆暢,井上昌睦,吉積正晃,須藤泰範,和泉輝郎,塩原融, Estimation of in-plane thermal diffusivity in YBCO bi-crystalline thin film by use of the low temperature laser scanning microscopy, 第79回 2008年度秋季 低温工学・超電導学会, 2008.11. |
127. | 阿比留健志,本田貴裕,井上昌睦,木須隆暢,加藤順子,筑本知子,中尾公一,山田穣,塩原融, 磁気顕微法によるマルチフィラメント模擬線材の電流分布の可視化, 第79回 2008年度秋季 低温工学・超電導学会, 2008.11. |
128. | 今村和孝,東川甲平,井上昌睦,木須隆暢,新海優樹,加藤武志,山田穣,塩原融, RE123線材の磁界環境下における一軸機械歪依存性の評価, 第79回 2008年度秋季 低温工学・超電導学会, 2008.11. |
129. | 本田貴裕,阿比留健志,井上昌睦,木須隆暢,加藤順子,筑本知子,中尾公一,塩原融,飯島康弘,柿本一臣,齊藤隆, 銀拡散接合による線材補修部の電流分布の評価, 第79回 2008年度秋季 低温工学・超電導学会, 2008.11. |
130. | 木須隆暢,MATSEKH Arkadiy,井上昌睦,吉積正晃,須藤泰範,和泉輝郎,塩原融, 低傾角YBCOバイクリスタル粒界の磁界誘起クロスオーバ領域における粒間Jcの検出, 第79回 2008年度秋季 低温工学・超電導学会, 2008.11. |
131. | 井上昌睦,東川甲平,木須隆暢,淡路智,渡辺和雄,福島弘之,衣斐顕,宮田成紀,山田穣,塩原融, 長尺GdBCO線材の臨界電流特性の温度、磁界、磁界印加角度依存性, 第79回 2008年度秋季 低温工学・超電導学会, 2008.11. |
132. | 東川甲平,木須隆暢,井上昌睦,今村和孝,淡路智,渡辺和雄,福島弘之,山田穣,塩原融, GdBCO線材電流輸送特性の温度・磁界・磁界印加角度・機械的ひずみ依存性を考慮した高磁界マグネットコイルの電磁界‐熱‐構造連成解析, 第79回 2008年度秋季 低温工学・超電導学会, 2008.11. |
133. | 阿比留健志,本田貴裕,井上昌睦,木須隆暢,加藤順子,筑本知子,中尾公一,塩原融, RE123超伝導線材の欠陥補修接続部位における非線形電流分布の観測, 平成20年度応用物理学会九州支部学術講演会, 2008.11. |
134. | T. Kiss, K. Higashikawa, A. Matsekh, K. Imamura, K. Abiru, Y. Honda, M. Inoue, S. Miyata, A. Ibi, Y. Yamada, J. Kato, N. Chikumoto, K. Nakao, M. Yoshizumi, T. Izumi, Y. Shiohara, Critical currents and AC losses in coated conductors (Invited), International Workshop on Coated Conductors for Applications, 2008.12. |
135. | 東川甲平,阿比留健志,本田貴裕,井上昌睦,木須隆暢,中尾公一,和泉輝郎,塩原融,飯島康裕,柿本一臣,斉藤隆,岡元洋, 磁気顕微法によるYBCOマルチフィラメント模擬線材のヒステリシス特性評価と数値解析による考察, 平成21年電気学会全国大会, 2009.03. |
136. | 本田貴裕,阿比留健志,井上昌睦,木須隆暢,中尾公一,山田穣,塩原融, 走査型ホール素子磁気顕微鏡システムを用いたマルチフィラメント模擬線材の電流分布の可視化, 2009年春季 第56回応用物理学関係連合講演会, 2009.04. |
137. | 井上昌睦,兒玉青樹,木須隆暢,兼子敦,青木裕治,和泉輝郎,宮田成紀,山田穣,塩原融, TFA-MOD法により作製された混晶系RE123線材の臨界電流特性, 2009年春季 第56回応用物理学関係連合講演会, 2009.04. |
138. | 本田貴裕,東川甲平,阿比留健志,井上昌睦,岩熊成卓,木須隆暢,中尾公一,山田穣,和泉輝郎, 走査型ホール素子磁気顕微鏡システムを用いた高温超伝導テープ線材の交流電流分布可視化手法の開発, 第80回 2009年度春季 低温工学・超電導学会, 2009.05. |
139. | 東川甲平,本田貴裕,阿比留健志,井上昌睦,岩熊成卓,木須隆暢,中尾公一,山田穣,和泉輝郎, YBCOマルチフィラメント模擬線材における交流通電時損失分布の可視化, 第80回 2009年度春季 低温工学・超電導学会, 2009.05. |
140. | 井上昌睦,兒玉青樹,木須隆暢,兼子敦,青木裕治,宮田成紀,和泉輝郎,山田穣,塩原融, 塗布熱分解法により作製された混晶系RE123線材の臨界電流特性, 第80回 2009年度春季 低温工学・超電導学会, 2009.05. |
141. | 今村和孝,東川甲平,井上昌睦,木須隆暢,福島弘之,衣斐顕,宮田成紀,山田穣,和泉輝郎, IBAD/PLD法により作製されたGdBCO線材の磁界環境下における一軸機械歪依存性, 第80回 2009年度春季 低温工学・超電導学会, 2009.05. |
142. | 木須隆暢, 超伝導技術の実用化に向けた新たな展開 〜2050年超伝導社会、そして今何をすべきか〜材料・特性評価関係:動向・課題将来展望 (invited), 戦略的イノベーション創出のための超伝導システムワークショップ, 2009.06. |
143. | 木須隆暢, 超伝導材料高度化に向けた特性評価技術の開発 (invited), 新超伝導材料科学シンポジウム, 2009.08. |
144. | 東川甲平,本田貴裕,井上昌睦,木須隆暢,綾井直樹,菊池昌志,林和彦,佐藤謙一, 磁気顕微法によるDI-BSCCO線材の臨界電流密度分布に関する検討, 2009年(平成21年)秋季 第70回応用物理学会学術講演会, 2009.09. |
145. | 本田貴裕,東川甲平,井上昌睦,岩熊成卓,木須隆暢,中尾公一,山田穣,和泉輝郎, 走査型ホール素子磁気顕微鏡システムを用いた高温超伝導線材の交流電流分布の可視化, 2009年(平成21年)秋季 第70回応用物理学会学術講演会, 2009.09. |
146. | 井上昌睦,東川甲平,Rene Fuger,木須隆暢,淡路智,難波雅史,渡辺和雄,宮田成紀,衣斐顕,山田穣,和泉輝郎, IBAD-MgO基板上に作製されたGdBCO線材のJcの温度、磁場、角度依存性, 2009年(平成21年)秋季 第70回応用物理学会学術講演会, 2009.09. |
147. | Takanobu Kiss, Current transport properties in RE-123 coated conductors (invited), 9th Int. Conf. on Materials and Mechanisms of Superconductivity and High Temperature Superconductors (M2S-IX), 2009.09. |
148. | 井上昌睦,木須隆暢, REBCO高温超伝導線材の臨界電流特性 (invited), 2009年度東北・北海道支部/材料研究会/金研強磁場センター合同研究会, 2009.09. |
149. | N. Kashima, T. Watanabe, Y. Nijo, S. Nagaya, R. Nakasaki, A. Nakai, K. Yamamoto, M. Miura, M. Inoue, T. Kiss, Study of GdBa2Cu3O7-d and GdxY1-xBa2Cu3O7-d coated conductors by metal organic chemical vapor deposition, 9th European Conference on Applied Superconductivity (EUCAS2009), 2009.09. |
150. | R. Fuger, M. Inoue, K. Higashikawa, T. Kiss, M. Namba, S. Awaji, K. Watanabe, A. Ibi, H. Fukushima, Y. Yamada, Y. Shiohara, Evaluation of current transport properties of Gd1Ba2Cu3O7-d coated conductors up to 27 T of external magnetic fields, 9th European Conference on Applied Superconductivity (EUCAS2009), 2009.09. |
151. | 兒玉青樹,井上昌睦,木須隆暢,兼子敦,青木裕治,宮田成紀,和泉輝郎,山田穣,岡元洋, 塗布熱分解法により作製された混晶系RE-123高温超伝導線材の電流輸送特性, 電気関係学会九州支部第62回連合大会, 2009.09. |
152. | 川口鉄平,東川甲平,井上昌睦,木須隆暢, 有限要素法を用いた高温超伝導コイルの磁気浮上特性の解析, 電気関係学会九州支部第62回連合大会, 2009.09. |
153. | Y. Honda, K. Higashikawa, M. Inoue, T. Kiss, N. Ayai, M. Kikuchi, K. Hayashi, K. Sato, Study on current distribution in DI-BSCCO tape based on the scanning hall probe magnetic microscopy, 22nd International Symposium on Superconductivity (ISS2009), 2009.11. |
154. | A.M. Matsekh, M. Inoue, T. Kiss, A. Ibi, S. Miyata, Y. Yamada, T. Izumi, Improvement of spatial homogeneity in GdBCO/IBAD-MgO coated conductor, 22nd International Symposium on Superconductivity (ISS2009), 2009.11. |
155. | M. Inoue, R. Fuger, K. Higashikawa, T. Kiss, M. Namba, S. Awaji, K. Watanabe, A. Ibi, S. Miyata, Y. Yamada, T. Izumi, Current transport property in GdBCO coated conductor with artificial pinning centers in a wide range of temperature, magnetic field up to 27 T, and field angle, 22nd International Symposium on Superconductivity (ISS2009), 2009.11. |
156. | K. Higashikawa, Y. Honda, M. Inoue, M. Iwakuma, T. Kiss, K. Nakao, Y. Yamada, T. Izumi, Spatially-resolved measurement on time-dependent electromagnetic behavior in alternating current carrying coated conductor, 22nd International Symposium on Superconductivity (ISS2009), 2009.11. |
157. | 東川 甲平, 本田 貴裕, 井上 昌睦, 木須 隆暢, 筑本 知子, 坂井 直道, 和泉 輝郎, 磁気顕微法と有限要素法によるRE-123線材銀拡散接合部の準3次元電流分布評価, 第81回 2009年度秋季 低温工学・超電導学会, 2009.11. |
158. | 井上 昌睦, 東川 甲平, Fuger Rene, 木須 隆暢, 淡路 智, 難波 雅史, 渡辺 和雄, 宮田 成紀, 衣斐 顕, 山田 穣, 和泉 輝郎, IBAD-MgO基板上に作製したPLD-GdBCO線材の電流輸送特性の温度、磁場、角度依存性, 第81回 2009年度秋季 低温工学・超電導学会, 2009.11. |
159. | 本田 貴裕, 東川 甲平, 井上 昌睦, 木須 隆暢, 綾井 直樹, 菊地 昌志, 林 和彦, 佐藤 謙一, 加圧焼成法によって作製された200A級Bi-2223線材の更なる高臨界電流密度化に向けた検討:線材内電流分布と超伝導フィラメントの電流輸送についての考察, 第81回 2009年度秋季 低温工学・超電導学会, 2009.11. |
160. | 今村 和孝, 東川 甲平, 井上 昌睦, 木須 隆暢, 衣斐 顕, 宮田 成紀, 山田 穣, 和泉 輝郎, PLD-GdBCO/IBAD線材の磁界環境下における一軸機械歪依存性, 第81回 2009年度秋季 低温工学・超電導学会, 2009.11. |
161. | 長田拓朗,井上昌睦,木須隆暢,土井俊哉,山田穣,和泉輝郎, 走査型SQUID磁気顕微鏡による超伝導薄膜中の量子化磁束挙動の観察, 平成21年度応用物理学会九州支部学術講演会, 2009.11. |
162. | G. Kim, W. Jo, A. Matsekh, T. Kiss, H.S. Ha, S.S. Oh, Local visualizing study of SmBa2Cu3O7 coated conductors grown by an evaporation method, 平成21年度応用物理学会九州支部学術講演会, 2009.11. |
163. | R. Fuger, T. Kiss, M. Inoue, N. Chikumoto, S. Lee, Y. Yamada, T. Izumi, Current transport property of Gd1Ba2Cu3O7-? coated conductor deposited by the in-plume PLD reel-to-reel technique, International Workshop on Coated Conductors for Applications (CCA2009), 2009.11. |
164. | M. Inoue, K. Higashikawa, R. Fuger, T. Kiss, M. Namba, S. Awaji, K. Watanabe, A. Ibi, S. Miyata, Y. Yamada, T. Izumi, Angular dependence of in-field E-J characteristics in GdBCO coated conductor, International Workshop on Coated Conductors for Applications (CCA2009), 2009.11. |
165. | A. Matsekh, M. Inoue, T. Kiss, S. Miyata, A. Ibi, Y. Yamada, T. Izumi, Homogeneous flux flow dissipation in GdBCO PLD/IBAD superconducting tapes, International Workshop on Coated Conductors for Applications (CCA2009), 2009.11. |
166. | K. Higashikawa, Y. Honda, M. Inoue, M. Iwakuma, T. Kiss, K. Nakao, Y. Yamada, T. Izumi, Visualization of time-dependent AC loss distribution for coated conductors, International Workshop on Coated Conductors for Applications (CCA2009), 2009.11. |
167. | G. Kim, A. Matsekh, T. Kiss, W. Jo, H. S. Ha, S. S. Oh, Visualization of low-temperature transport properties of SmBa2Cu3O7-d coated conductors on IBAD-MgO templates, Asian Conference 2009 on Applied Superconductivity and Cryogenics (ACASC2009), 2009.12. |
168. | M. Inoue, K. Higashikawa, R. Fuger, T. Kiss, M. Namba, S. Awaji, K. Watanabe, A. Ibi, S. Miyata, Y. Yamada, T. Izumi, Angular dependence of in-field E-J characteristics in PLD-GdBCO/IBAD coated conductor, Asian Conference 2009 on Applied Superconductivity and Cryogenics (ACASC2009), 2009.12. |
169. | Takanobu Kiss, Investigation on current limiting mechanism in HTS tapes and its feedback to high performance RE-123 and Bi-2223 wire developments (invited), 14th US-Japan Workshop on Advanced Superconductors, 2009.12. |
170. | 木須隆暢,井上昌睦, Nb薄板のVortex挙動に及ぼす中性子照射効果, 「中性子照射による超伝導マグネット材料の特性変化」研究会, 2009.12. |
171. | 木須隆暢,東川甲平,本田貴裕,井上昌睦,綾井直樹,菊地昌志,林 和彦,佐藤謙一, Bi-2223マルチフィラメント線材の局所電流輸送特性, 2010年春季 第57回応用物理学関係連合講演会, 2010.03. |
172. | 井上昌睦,東川甲平,Rene Fuger,三好良平,木須隆暢,淡路 智,難波雅史,渡辺和雄,飯島康裕,斉藤 隆,岡元 洋,和泉輝郎, 600A級高Ic-GdBCO/IBAD線材の磁場中臨界電流特性, 2010年春季 第57回応用物理学関係連合講演会, 2010.03. |
173. | 東川甲平,本田貴裕,井上昌睦,木須隆暢,筑本知子,坂井直道,和泉輝郎,岡元 洋, 磁気顕微法によるRE-123線材銀拡散接合部の電流分布評価, 平成22年 電気学会全国大会, 2010.03. |
174. | T. Kiss, K. Higasihkawa, A. Matsekh, R. Fuger, K. Honda, M. Inoue, N. Chikumoto, A. Ibi, S. Miyata, Y. Yamada, T. Izumi, K. Kakimoto, Y. Iijima, T. Saitoh, Novel Characterization Techniques Resolving Critical Currents in RE123 Coated Conductors, 2010 Korea-Japan Superconductivity Workshop, 2010.04. |
175. | 川口鉄平, 東川甲平, 井上昌睦, 木須隆暢, 菊地昌志, 小林慎一, 中島隆芳, 林和彦, 佐藤謙一, 加圧焼成法によって作製されたBi-2223/Agテープ材の長手方向均一性とE-J特性との対応, 第82回 2010年度春季 低温工学・超電導学会, 2010.05. |
176. | 木須隆暢, 井上昌睦, 東川甲平, Arkadiy Matsekh, Rene Fuger, 飯島康裕, 柿本一臣, 斎藤隆, 淡路智, 難波雅史, 渡辺和雄, 和泉輝郎, 600A/cm-w級厚膜化GdBCO/IBADコート線材の空間均一性と磁場中電流輸送特性, 第82回 2010年度春季 低温工学・超電導学会, 2010.05. |
177. | 東川甲平, 本田貴裕, 井上昌睦, 木須隆暢, 筑本知子, 坂井直道, 和泉輝郎, 岡元洋, 直流ならびに交流通電時におけるRE-123線材銀拡散接合部の3次元電流分布評価, 第82回 2010年度春季 低温工学・超電導学会, 2010.05. |
178. | 兒玉青樹, 井上昌睦, 木須隆暢, 式町浩二, 渡部智則, 鹿島直二, 長屋重夫, CVD法により作製されたREBCO線材の電流輸送特性, 第82回 2010年度春季 低温工学・超電導学会, 2010.05. |
179. | 東川甲平, 本田貴裕, 川口鉄平, 井上昌睦, 木須隆暢, 筑本知子, 坂井直道, 和泉輝郎, 岡元洋, 磁気顕微法ならびに有限要素法によるRE-123線材補修・接続部の電磁現象評価, 電気学会超電導応用電力機器研究会「超電導応用ならびに材料関連技術」, 2010.06. |
180. | M. Inoue, T. Kiss, Local Superconducting Properties and Global E-J characteristics in REBCO Coated Conductors (invited), The Korean Superconductivity Society Meeting 2010, 2010.07. |
181. | T. Kiss, Introduction of Superconductivity Research Projects at Kyushu University and Education Programs for Foreign Students (invited), Seminar at University of Malaysia Sabah, 2010.07. |
182. | T. Kiss, Superconductor Power Applications for Reduction of CO2 Emissions: -- Key Technologies for Green-Innovation -- (invited), Seminar at University of Malaysia Sabah, 2010.07. |
183. | T. Kiss, Multi-scale analysis of critical current and vortex dynamics in superconductors (invited), Japan-EU Workshop on Superconductivity, 2010.08. |
184. | T. Kiss, A. Matsekh, K. Higashikawa, R. Fuger, M. Inoue, S. Awaji, K. Watanabe, Y. Iijima, T. Saitoh, T. Izumi, Recent enhancement of critical current and spatial homogeneity in thick GdBCO/IBAD coated conductors (invited), Applied Superconductivity Conference (ASC2010), 2010.08. |
185. | N. Kashima, K. Shima, S. Kubota, S. Nagaya, T. Doi, M. Inoue, T. Kiss, Novel substrate based on textured Cu {100} for coated conductors, Applied Superconductivity Conference (ASC2010), 2010.08. |
186. | T. Kiss, K. Higashikawa, Y. Honda, M. Inoue, M. Kikuchi, S. Kobayashi, K. Hayashi, K. Sato, Local current transport properties in 200A-class Bi-2223 multi-filamentary tapes fabricated by the controlled over pressure process, Applied Superconductivity Conference (ASC2010), 2010.08. |
187. | A. Matsekh, M. Inoue, T. Kiss, Y. Iijima, T. Saitoh, T. Izumi, Spatial homogeneity in 600 A/cm-w class GdBa2Cu3O7-δ coated conductor obtained by PLD process, Applied Superconductivity Conference (ASC2010), 2010.08. |
188. | M. Inoue, R. Miyoshi, R. Fuger, K. Higashikawa, T. Kiss, S. Awaji, M. Namba, K. Watanabe, Y. Iijima, T. Saitoh, T. Izumi, In-field current transport properties of 600A-class GdBa2Cu3O7-δ coated conductor utilizing IBAD-MgO template, Applied Superconductivity Conference (ASC2010), 2010.08. |
189. | R. Fuger, R. Miyoshi, T. Kiss, N. Chikumoto, S. Lee, T. Izumi, Transport characterization of GdBa2Cu3O7-δ coated conductors deposited by the in-plume PLD reel-to-reel technique, Applied Superconductivity Conference (ASC2010), 2010.08. |
190. | K. Higashikawa, Y. Honda, M. Inoue, T. Kiss, N. Chikumoto, N. Sakai, T. Izumi, Investigation of three-dimensional current distribution at silver diffusion joint of RE-123 coated conductors based on magnetic microscopy combined with finite element method, Applied Superconductivity Conference (ASC2010), 2010.08. |
191. | G. Kim, A. Matsekh, M. Inoue, T. Kiss, W. Jo, H. S. Ha, S. S. Oh, Current limiting phenomena in SmBa2Cu3O7-δ coated conductors observed by laser-induced thermoelectric imaging and low-temperature laser scanning microscopy, Applied Superconductivity Conference (ASC2010), 2010.08. |
192. | 木須隆暢, 超伝導技術で拓くグリーン・イノベーション (invited), 2010年度九州大学大学院システム情報科学府・研究院 先端サマーセミナー「システム情報の底力」, 2010.09. |
193. | 井上昌睦,東川甲平,Rene Fuger,木須隆暢,淡路智,渡辺和雄,飯島康裕,斉藤隆,岡元洋,和泉輝郎, 600AのIc値を有するGdBCO/IBAD線材の強磁場中の臨界電流特性, 2010年(平成22年)秋季 第71回応用物理学会学術講演会, 2010.09. |
194. | 木須隆暢,Arkadiy Matsekh,井上昌睦,鹿島直二,長屋重夫, CVD法による(GdxY1-x)Ba2Cu3O7-dコート線材における基板研磨プロセスによる局所均一性の向上, 2010年(平成22年)秋季 第71回応用物理学会学術講演会, 2010.09. |
195. | 木須隆暢,東川甲平,川口鉄平,塩原敬,井上昌睦,吉積正晃,和泉輝郎, 走査型Hall素子磁気顕微鏡によるRE-123コート線材の臨界電流2次元分布の評価, 2010年(平成22年)秋季 第71回応用物理学会学術講演会, 2010.09. |
196. | アルカディ マツェック,井上昌睦,木須隆暢,衣斐顕,宮田世紀,山田穣,和泉輝郎, Study on spatial homogeneity in RE-123 coated conductors by use of laser scanning microscopy, 2010年(平成22年)秋季 第71回応用物理学会学術講演会, 2010.09. |
197. | T. Kiss, Characterization for high performance wire development (invited), The 2nd Japan-Korea Superconductivity Workshop 2010, 2010.10. |
198. | K. Higashikawa, M. Inoue, T. Kiss, N. Chikumoto, N. Sakai, T. Izumi, H. Okamoto, Three-dimensional current distribution at silver diffusion joint of RE-123 coated conductors, The 2nd Japan-Korea Superconductivity Workshop 2010, 2010.10. |
199. | K. Shiohara, K. Higashikawa, T. Kawaguchi, M. Inoue, T. Kiss, M. Yoshizumi, T. Izumi, Y. Shiohara, Imaging of local critical currents in TFA-MOD processed coated conductors based on scanning Hall-probe microscopy, The 2nd Japan-Korea Superconductivity Workshop 2010, 2010.10. |
200. | A. Matsekh, M. Inoue, T. Kiss, Y. Shiohara, Current transparency and local dissipation at the artificial grain boundary under external magnetic field, The 2nd Japan-Korea Superconductivity Workshop 2010, 2010.10. |
201. | G. Kim, W. Jo, A. Matsekh, M. Inoue, T. Kiss, H.S. Ha, S.S. Oh, Visualization of local transport properties of rare-earth based coated conductors by laser scanning microscopic techniques, The 2nd Japan-Korea Superconductivity Workshop 2010, 2010.10. |
202. | T. Kawaguchi, K. Higashikawa, K. Shiohara, M. Inoue, T. Kiss, Y. Shingai, M. Konishi, K. Abiru, K. Ohmatsu, Y. Shiohara, Degradations of critical current density in coated conductors by different cutting methods, The 2nd Japan-Korea Superconductivity Workshop 2010, 2010.10. |
203. | R. Fuger, S. Kodama, T. Kiss, N. Chikumoto, S. Lee, T. Izumi, Y. Iijima, T. Saitoh, Hysteretic behavior on current polarity observed in wide range angular dependents measurements of GdBa2Cu3O7-δ coated conductors, The 2nd Japan-Korea Superconductivity Workshop 2010, 2010.10. |
204. | S. Kodama, R. Fuger, M. Inoue, T. Kiss, Y. Iijima, T. Saitoh, T. Izumi, Current transport property in GdBCO coated conductor for high-Tc superconducting Motor, The 2nd Japan-Korea Superconductivity Workshop 2010, 2010.10. |
205. | T. Nagata, M. Inoue, T. Kiss, Measurement of single vortex dynamics in superconducting thin film by using scanning SQUID microscopy, The 2nd Japan-Korea Superconductivity Workshop 2010, 2010.10. |
206. | M. Inoue, R. Fuger, K. Higashikawa, T. Kiss, D. Larbalestier, J. Jaroszynski, V. Braccini, A. Xu, Y. Iijima, T. Saitoh, S. Awaji, K. Watanabe, T. Izumi, Critical current property of 600A/cm-w class GdBCO/IBAD coated conductors in low temperature and high field up to 31T, International Workshop on Coated Conductors for Applications 2010 (CCA 2010), 2010.10. |
207. | R. Fuger, S. Kodama, M. Inoue, T. Kiss, N. Chikumoto, S. Lee, T. Izumi, Y. Iijima, T. Saitoh, Intrinsic peak misalignment observed in wide range angular dependents measurements of GdBa2Cu3O7-δ coated conductors, International Workshop on Coated Conductors for Applications 2010 (CCA 2010), 2010.10. |
208. | K. Higashikawa, T. Kawaguchi, K. Shiohara, M. Inoue, T. Kiss, T. Machi, K. Tanabe, T. Izumi, Y. Shiohara, N. Aoki, Y. Aoki, T. Koizumi, Noncontact measurement on critical current distribution in multifilamentary coated conductors based on scanning Hall-probe microscopy, International Workshop on Coated Conductors for Applications 2010 (CCA 2010), 2010.10. |
209. | K. Shiohara, K. Higashikawa, T. Kawaguchi, M. Inoue, T. Kiss, T. Machi, N. Chikumoto, K. Nakao, K. Tanabe, M. Yoshizumi, T. Izumi, Y. Shiohara, Imaging of two-dimensional distribution of critical current density in coated conductors based on scanning Hall-probe microscopy, International Workshop on Coated Conductors for Applications 2010 (CCA 2010), 2010.10. |
210. | T. Kawaguchi, K. Higashikawa, K. Shiohara, M. Inoue, T. Kiss, Y. Shingai, M. Konishi, K. Abiru, K. Ohmatsu, Y. Shiohara, Influence of cutting method on the degradation of critical current density in coated conductors, International Workshop on Coated Conductors for Applications 2010 (CCA 2010), 2010.10. |
211. | A. Matsekh, T. Kiss, M. Inoue, N. Kashima, S. Nagaya, The influence of substrate polishing on spatial homogeneity and critical current density in CVD (GdxY1-x)Ba2Cu3O7-d coated conductors, International Workshop on Coated Conductors for Applications 2010 (CCA 2010), 2010.10. |
212. | G. Kim, W. Jo, A. Matsekh, M. Inoue, T. Kiss, H.S. Ha, S.S. Oh, Correlation of local current transport and microstructural defects in SmBa2Cu3O7-d coated conductors investigated by laser scanning microscopy, International Workshop on Coated Conductors for Applications 2010 (CCA 2010), 2010.10. |
213. | T. Kiss, K. Higashikawa, A. Matsekh, K. Shiohara, M. Inoue, Y. Iijima, T. Saitoh, K. Ohmatsu, T. Kato, T. Machi, T. Izumi, Y. Shiohara, Multi-scale multi-physics characterization of coated conductors (invited), International Workshop on Coated Conductors for Applications 2010 (CCA 2010), 2010.10. |
214. | 塩原敬, 東川甲平, 川口鉄平, 井上昌睦, 木須隆暢, 吉積正晃, 和泉輝郎, 走査型Hall素子磁気顕微鏡によるTFA-MOD法YBCO線材の臨界電流分布評価, 電気学会 金属・セラミックス研究会「超電導材料」, 2010.10. |
215. | M. Inoue, K. Higashikawa, T. Kawaguchi, T. Kiss, A.A. Polyanskii, F. Kametani, D.C. Larbalestier, M. Kikuchi, S. Kobayashi, K. Hayashi, K. Sato, Local superconducting property and microstructure in 200A-class Bi-2223 multi-filamentary wires, 23rd International Symposium on Superconductivity (ISS2010), 2010.11. |
216. | R. Fuger, T. Kiss, M. Inoue, Y. Iijima, T. Saitoh, T. Izumi, E-J characteristics of GdBa2Cu3O7-δ coated conductors in the low electric field region determinate with relaxation method, 23rd International Symposium on Superconductivity (ISS2010), 2010.11. |
217. | A. Matsekh, M. Inoue, T. Kiss, S. Miyata, A. Ibi, T. Izumi, Local Jc variation of GdBCO coated conductors with artificial pinning centers under the influence of external magnetic field, 23rd International Symposium on Superconductivity (ISS2010), 2010.11. |
218. | K. Shiohara, K. Higashikawa, T. Kawaguchi, M. Inoue, T. Kiss, M. Yoshizumi, T. Izumi, Measurement of local critical currents in TFA-MOD processed coated conductors by use of scanning Hall-probe microscopy, 23rd International Symposium on Superconductivity (ISS2010), 2010.11. |
219. | K. Higashikawa, M. Inoue, T. Kawaguchi, K. Shiohara, K. Imamura, T. Kiss, Y. Iijima, K. Kakimoto, T. Saitoh, T. Izumi, Scanning Hall-probe microscopy system for two-dimensional imaging of critical current density in RE-123 coated conductors, 23rd International Symposium on Superconductivity (ISS2010), 2010.11. |
220. | T. Kiss, Key Performance Issues of Coated Conductors (invited), 23rd International Symposium on Superconductivity (ISS2010), 2010.11. |
221. | 山口仁正, 児玉青樹, Rene Fuger, 井上昌睦, 木須隆暢, 飯島康裕, 斎藤隆, 和泉輝郎, PLD法により作成されたGdBCO高温超伝導線材の電流輸送特性, 平成22年度応用物理学会九州支部学術講演会, 2010.11. |
222. | 小牧佳弘, 東川甲平, 川口鉄平, 塩原敬, 井上昌睦, 木須隆暢, 飯島康裕, 柿本一臣, 斉藤隆, 和泉輝郎, 磁気顕微法によるRE-123線材の局所的臨界電流密度分布の評価, 平成22年度応用物理学会九州支部学術講演会, 2010.11. |
223. | 大池研司, Arkadiy Matsekh, 井上昌睦, 木須隆暢, Gracia Kim, William Jo, Hong-Soo Ha, Sang-Soo Oh, 低温レーザ走査顕微鏡によるSmBCO高温超伝導線材の局所超伝導特性の観察, 平成22年度応用物理学会九州支部学術講演会, 2010.11. |
224. | 長田拓朗, 井上昌睦, 木須隆暢, 土井俊哉, 和泉輝郎, 走査型SQUID磁気顕微鏡を用いた単一量子化磁束の挙動観察, 平成22年度応用物理学会九州支部学術講演会, 2010.11. |
225. | 東川甲平, 川口鉄平, 塩原敬, 井上昌睦, 木須隆暢, 町敬人, 筑本知子, LEE Sergey, 田辺圭一, 和泉輝郎, 新海優樹, 小西昌也, 交流電力機器用RE-123加工線材の臨界電流密度分布評価, 第83回 2010年度秋季 低温工学・超電導学会, 2010.12. |
226. | 塩原敬, 東川甲平, 川口鉄平, 井上昌睦, 木須隆暢, 桝田靖人, 寺西亮, 吉積正晃, 和泉輝郎, TFA-MOD成膜プロセスへの迅速なフィードバックに向けた臨界電流特性の複数試料マトリックス磁気顕微法による評価, 第83回 2010年度秋季 低温工学・超電導学会, 2010.12. |
227. | 井上昌睦, FugerRene, 東川甲平, 木須隆暢, LARBALESTIER David, JAROSZYNSKI Jan, BRACCINI Valeria, XU Aixia , 飯島康裕, 斎藤隆, 淡路智, 渡辺 雄, 600A/cm-w級厚膜化GdBCO/IBADコート線材の低温・強磁場中の臨界電流特性, 第83回 2010年度秋季 低温工学・超電導学会, 2010.12. |
228. | 東川甲平,川口鉄平,井上昌睦,木須隆暢,飯島康裕,柿本一臣,斉藤 隆,和泉輝郎, 走査型ホール素子顕微鏡を用いたRE-123線材の局所的臨界電流密度分布評価, 平成23年 電気学会全国大会, 2011.03. |
229. | 木須隆暢,東川甲平,塩原敬,川口鉄平,井上昌睦,吉積正晃,和泉輝郎, TFA-MOD法によるYBCOコート線材の臨界電流密度分布に与えるガスフローの影響と均一性の向上, 2011年春季 第58回応用物理学関係連合講演会, 2011.03. |
230. | 井上昌睦,木須隆暢,土井俊哉,宇田達也,Dmytro Abraimov,Anatolii Polyanskii,David Larbalestier,窪田秀一,嶋邦弘,鹿島直二,長屋重夫,加藤丈晴, Niめっき配向Cu/SUS316貼合せテープ基板上に作製したYBa2Cu3O7薄膜の磁束フロー損失分布の可視化, 2011年春季 第58回応用物理学関係連合講演会, 2011.03. |
231. | Arkadiy Matsekh,木須隆暢,井上昌睦,本田貴裕,大松一也, Spatial homogeneity in YBCO coated conductors deposited on clad-type textured substrate, 2011年春季 第58回応用物理学関係連合講演会, 2011.03. |
232. | 塩原 敬, 東川 甲平, 井上 昌睦, 木須 隆暢, 吉積 正晃, 和泉 輝郎, TFA-MOD法により作製されたYBCOコート線材の臨界電流密度分布に与えるガスフローの影響と均一性の向上, 低温工学・超電導学会 九州・西日本支部研究会, 2011.04. |
233. | 榊原 崇志, Fuger Rene, 井上 昌睦, 東川 甲平, 木須 隆暢, 飯島 康裕, 齊藤 隆, 和泉 輝郎, 電流輸送特性のモデリングに基づくREBCO線材の臨界電流密度マップ, 低温工学・超電導学会 九州・西日本支部研究会, 2011.04. |
234. | 田上 貴大, Matsekh Arkadiy, 大池 研司, 井上 昌睦, 木須 隆暢, 本田 貴裕, 大松 一也, 配向基材型イットリウム系高温超伝導線材の損失分布の可視化, 低温工学・超電導学会 九州・西日本支部研究会, 2011.04. |
235. | 奥村 慶太郎, 東川 甲平, 今村 和孝, 塩原 敬, 小牧 佳弘, 井上 昌睦, 木須 隆暢, 飯島 康裕, 斉藤 隆, 吉積 正晃, 和泉 輝郎, 岡本 洋, 走査型ホール素子磁気顕微鏡を用いた希土類系高温超伝導線材の臨界電流密度分布評価, 低温工学・超電導学会 九州・西日本支部研究会, 2011.04. |
236. | 加藤 祥晃, 井上 昌睦, 東川 甲平, 小牧 佳弘, 木須 隆暢, 磁気顕微鏡への適用を目指したアレー型微小ホール素子磁気センサの作製と評価, 低温工学・超電導学会 九州・西日本支部研究会, 2011.04. |
237. | 木須 隆暢, 東川 甲平, 塩原 敬, 井上 昌睦, 飯島 康裕, 齊藤 隆, 和泉 輝郎, RE-123線材の局所Jc分布と磁場中電流輸送特性に関する考察, 第84回低温工学・超電導学会, 2011.05. |
238. | Matsekh Arkadiy, 木須 隆暢, 井上 昌睦, 本田 貴裕, 大松 一也, Local dissipation and spatial homogeneity in YBCO coated conductors deposited on clad-type textured substrate, 第84回低温工学・超電導学会, 2011.05. |
239. | 東川 甲平, 今村 和孝, 塩原 敬, 井上 昌睦, 木須 隆暢, 飯島 康裕, 齊藤 隆, 吉積 正晃, 和泉 輝郎, 長尺RE-123線材の面内臨界電流密度分布の非破壊評価に向けた走査型ホール素子顕微鏡システムの高速化, 第84回低温工学・超電導学会, 2011.05. |
240. | 榊原 崇志, 兒玉 青樹, Fuger Rene, 井上 昌睦, 東川 甲平, 木須 隆暢, 飯島 康裕, 齊藤 隆, 和泉 輝郎, 電流輸送特性のモデリングに基づくREBCO線材の臨界電流密度マップ, 第84回低温工学・超電導学会, 2011.05. |
241. | T. Kiss, A. Matsekh, K. Higashikawa, M. Inoue, Y. Honda, K. Ohmatsu, Visualizing current limiting obstacles in YBCO coated conductors deposited on clad-type textured substrate, Cryogenic Engineering Conf. and Int. Cryogenic Materials Conf. (CEC-ICMC2011), 2011.06. |
242. | K. Higashikawa, K. Imamura, M. Inoue, T. Kiss, Characterization of Nonlinear Current Transport Properties in High Temperature Superconducting Wires for the Design of Innovative Magnet Applications, 2011 International Workshop on Advanced Electrical Engineering and Related Topics, 2011.07. |
243. | K. Shiohara, K. Higashikawa, M. Inoue, T. Kiss, M. Yoshizumi, T. Izumi, Nondestructive Analysis of Current Carrying Performance in Thin Film Superconductors for High Performance Wire Developments, 2011 International Workshop on Advanced Electrical Engineering and Related Topics, 2011.07. |
244. | A. Matsekh, M. Inoue, T. Kiss, Low-Temperature Laser Scanning Microscopy as a Tool For Resolving Microscopic Performance Issues of Thin Film Superconductors, 2011 International Workshop on Advanced Electrical Engineering and Related Topics, 2011.07. |
245. | M. Arkadiy, M. Inoue, T. Kiss, Low-temperature laser scanning microscopy as a tool for resolving microscopic performance issues of HTS wires, 低温工学・超電導学会 九州・西日本支部 第3回日韓超電導ワークショップ, 2011.07. |
246. | 塩原 敬, 東川 甲平, 井上 昌睦, 木須 隆暢, 吉積 正晃, 和泉 輝郎, 磁気顕微法を用いたTFA-MOD法YBCO線材の局所臨界電流密度の評価と作製プロセスの影響に関する検討, 低温工学・超電導学会 九州・西日本支部 第3回日韓超電導ワークショップ, 2011.07. |
247. | 大池 研司, Matsekh Arkadiy, 井上 昌睦, 木須 隆暢,梶原 貴人,波多 聰,池田 賢一,中島 英治, Kim Gracia, Jo William, Ha Hong-Soo, Oh Sang-Soo, 低温レーザ走査顕微鏡によるSmBCO高温超伝導線材の局所超伝導特性の観察, 低温工学・超電導学会 九州・西日本支部 第3回日韓超電導ワークショップ, 2011.07. |
248. | 奥村 慶太郎, 東川 甲平, 今村 和孝, 塩原 敬, 小牧 佳弘, 井上 昌睦, 木須 隆暢, 飯島 康裕, 斉藤 隆, 吉積 正晃, 和泉 輝郎, 岡本 洋, 長尺REBCO線材の面内臨界電流密度分布の非破壊評価に向けた走査型ホール素子顕微鏡システムの高速化, 低温工学・超電導学会 九州・西日本支部 第3回日韓超電導ワークショップ, 2011.07. |
249. | 加藤 祥晃, 井上 昌睦, 東川 甲平, 小牧 佳弘, 木須 隆暢, 磁気顕微鏡への適用を目指したアレー型微小ホール素子磁気センサの開発と評価, 低温工学・超電導学会 九州・西日本支部 第3回日韓超電導ワークショップ, 2011.07. |
250. | 榊原 崇志, Fuger Rene, 井上 昌睦, 東川 甲平, 木須 隆暢, 飯島 康裕, 齊藤 隆, 和泉 輝郎, 電流輸送特性のモデリングに基づくGdBCO線材の臨界電流密度マップ, 低温工学・超電導学会 九州・西日本支部 第3回日韓超電導ワークショップ, 2011.07. |
251. | 田上 貴大, Matsekh Arkadiy, 大池 研司, 井上 昌睦, 木須 隆暢, 本田 貴裕, 大松 一也, 配向基材型イットリウム系高温超伝導線材の局所損失分布の可視化, 低温工学・超電導学会 九州・西日本支部 第3回日韓超電導ワークショップ, 2011.07. |
252. | Takanobu Kiss, Critical currents in RE-123 coated conductor and its potential for high field application, 低温工学・超電導学会 九州・西日本支部 第3回日韓超電導ワークショップ, 2011.07. |
253. | 木須 隆暢,東川 甲平,塩原 敬,井上 昌睦,飯島 康裕,齊藤 隆,和泉 輝郎, 高品質RE123コート線材の磁場中臨界電流の決定因子に関する考察, 第72回応用物理学会学術講演会, 2011.09. |
254. | 井上 昌睦,木須 隆暢,土井 俊哉,Dmytro Abraimov,Anatolii Polyanskii,David Larbalestier,加藤 丈晴,窪田 秀一,嶋 邦弘,鹿島 直二,長屋 重夫, レーザ走査顕微鏡による超伝導テープ線材の結晶構造及び局所超伝導特性評価, 第72回応用物理学会学術講演会, 2011.09. |
255. | K. Higashikawa, T. Kawaguchi, K. Shiohara, M. Inoue, T. Kiss, T. Machi, N. Chikumoto, S. Lee, K. Tanabe, T. Izumi, H. Okamoto, Noncontact Characterization of In-plane Distribution of Critical Current Density in Multifilamentary Coated Conductor, 22nd Int. Conf. on Magnet Technology (MT-22), 2011.09. |
256. | T. Kiss, K. Higashikawa, K. Shiohara, M. Inoue, Y. Iijima, T. Saitoh, T. Izumi, Influence of local critical current distribution on the in-field current transport performance of GdBa2Cu3O7-d coated conductors, Superconductivity Centennial Conference (EUCAS-ISEC-ICMC 2011), 2011.09. |
257. | A. Matsekh, T. Kiss, M. Inoue, Y. Honda, K. Ohmatsu, Spatial homogeneity in YBCO coated conductors deposited on clad-type textured substrate, Superconductivity Centennial Conference (EUCAS-ISEC-ICMC 2011), 2011.09. |
258. | K. Shiohara, K. Higashikawa, T. Kawaguchi, M. Inoue, T. Kiss, M. Yoshizumi, T. Izumi, Influence of gas flow and improvement of homogeneity on the distribution of critical current density in YBCO coated conductor processed by TFA-MOD method, Superconductivity Centennial Conference (EUCAS-ISEC-ICMC 2011), 2011.09. |
259. | 榊原 崇志, 井上 昌睦, 東川 甲平, 木須 隆暢, 飯島 康裕, 斉藤 隆, 和泉 輝郎, 高温超伝導線材の電流輸送特性のモデリングに基づくJc及びn値のマッピング, 電気関係学会九州支部第64回連合大会, 2011.09. |
260. | 奥村 慶太郎, 東川 甲平, 今村 和孝, 塩原 敬, 小牧 佳弘, 井上 昌睦, 木須 隆暢, 飯島 康裕, 斉藤 隆, 町 敬人, 長尺REBCO線材の面内臨界電流密度分布の非破壊評価に向けた走査型ホール素子顕微鏡システムの高速計測技術, 電気関係学会九州支部第64回連合大会, 2011.09. |
261. | M. Inoue and T. Kiss, Evaluation of REBCO coated conductors and Bi-2223 tapes (invited), 24th Int. Sympo. on Superconductivity (ISS2011), 2011.10. |
262. | A. M. Matsekh, T. Kiss, M. Inoue, Y. Honda, K. Ohmatsu, The influence of grains alignment on critical current in YBCO coated conductors, deposited on clad-textured substrates, 24th Int. Sympo. on Superconductivity (ISS2011), 2011.10. |
263. | K. Higashikawa, K. Shiohara, Y. Komaki, K. Okumura, K. Imamura, M. Inoue, T. Kiss, Y. Iijima, T. Saitoh, T. Machi, M. Yoshizumi, T. Izumi, H. Okamoto, High-speed scanning Hall-probe microscopy for two-dimensional characterization of local critical current density in long-length coated conductor, 24th Int. Sympo. on Superconductivity (ISS2011), 2011.10. |
264. | K. Shiohara, K. Higashikawa, M. Inoue, T. Kiss, M. Yoshizumi, T. Izumi, Measurement of in-plane magnetic relaxation in RE-123 coated conductors by use of scanning Hall probe microscopy, 24th Int. Sympo. on Superconductivity (ISS2011), 2011.10. |
265. | M. Inoue, Y. Yamaguchi, T. Sakakibara, K. Imamura, K. Higashikawa, T. Kiss, S. Awaji, K. Watanabe, Y. Iijima, T. Saitoh, H. Tobita, M. Yoshizumi, T. Izumi, Critical current property of REBCO coated conductors (invited), The 15th Japan-US Workshop on Advanced Superconductors, 2011.10. |
266. | Takanobu Kiss, Recent progress of RE-123 coated conductor development for power applications in Japanese national project (invited), The Korea Institute of Applied Supercond. And Cryogenics Conf. 2011, 2011.10, 韓国超電導・低温工学会2011年度年次大会(The Korea Institute of Applied Superconductivity and Cryogenics Conference 2011 Oct. 13-14, Muju, Korea)において、「日本における希土類系高温超電導線材と応用機器開発の進展」と題する招待講演を行った。本講演は、経済産業省の主導するイットリウム系超電導電力機器技術開発プロジェクト(2008-2012年度)の中核メンバの一人として招聘を受けたものであり、筆者の従事する先進超電導線材の基盤技術開発と機器応用に関する最新動向と将来展望に関するレビューを行った。. |
267. | 井上 昌睦, 山口 仁正, 榊原 崇志, 東川 甲平, 今村 和孝, 木須 隆暢, 淡路 智, 渡辺 和雄, 飛田 浩史, 吉積 正晃, 和泉 輝郎, BaHfO3を添加したPLD-GdBCO線材の磁場中臨界電流特性, 第85回低温工学・超電導学会, 2011.11. |
268. | 梶原 貴人, 久保田 雄貴, 嶋田 雄介, 波多 聰, 池田 賢一, 中島 英治, MATSEKH ARKADIY, 井上 昌睦, 木須 隆暢, KIM GRACIA, JO WILLIAM, HA HONG-SOO, OH SANG-SOO, EDDC法により作製したSmBa2Cu3Oy高温超伝導線材の局所微細構造解析, 第85回低温工学・超電導学会, 2011.11. |
269. | 今村 和孝, 廣松 聖人, 山口 仁正, 榊原 崇志, 井上 昌睦, 東川 甲平, 木須 隆暢, 淡路 智, 渡辺 和雄, 飛田 浩史, 吉積 正晃, 和泉 輝郎, 磁化測定法によるPLD-GdBCO線材の低電界領域における電流輸送特性評価, 第85回低温工学・超電導学会, 2011.11. |
270. | 東川 甲平, 塩原 敬, 奥村 慶太郎, 今村 和孝, 井上 昌睦, 木須 隆暢, 木村 一成, 小泉 勉, 青木 裕治, 青木 伸夫, 吉積 正晃, 和泉 輝郎, 長尺RE-123線材の面内臨界電流密度分布非破壊評価に向けたリール式磁気顕微鏡システムの開発, 第85回低温工学・超電導学会, 2011.11. |
271. | 塩原 敬, 東川 甲平, 小牧 佳弘, 奥村 慶太郎, 井上 昌睦, 木須 隆暢, 町 敬人, 筑本 知子, 田辺 圭一, 吉積 正晃, 和泉 輝郎, 岡元 洋, 磁気顕微鏡を用いたRE-123線材の非破壊評価手法に関する機能検証, 第85回低温工学・超電導学会, 2011.11. |
272. | 飛田 浩史, 衣斐 顕, 横江 大作, 加藤 丈晴, 平山 司, 東川 甲平, 井上 昌睦, 木須 隆暢, 吉積 正晃, 和泉 輝郎, 塩原 融, BaHfO3導入によるPLD-GdBCO線材の磁場中Ic特性の向上, 第85回低温工学・超電導学会, 2011.11. |
273. | 廣松 聖人, 今村 和孝, 山口 仁正, 榊原 崇志, 井上 昌睦, 木須 隆暢, 飯島 康裕, 斎藤 隆, 飛田 浩史, 吉積 正晃, 和泉 輝郎, 磁化緩和測定によるGdBCO線材の超低電界特性の評価, 平成23年度応用物理学会九州支部学術講演会, 2011.11. |
274. | 賀 龍, 東川 甲平, 井上 昌睦, 木須 隆暢, 吉田 竜視, 加藤 丈晴, 町 敬人, 吉積 正晃, 和泉 輝郎, 岡元 洋, 走査型ホール素子顕微鏡によるRE-123マルチフィラメント線材の局所劣化部検出, 平成23年度応用物理学会九州支部学術講演会, 2011.11. |
275. | 井上 昌睦,山口 仁正,榊原 崇志,今村 和孝,東川 甲平,木須 隆暢,飯島 康裕,斎藤 隆,飛田 浩史,吉積 正晃,和泉 輝郎, BaHfO3を添加したGdBCO線材の磁場中臨界電流特性評価, 第59回応用物理学関係連合講演会, 2012.03. |
276. | 廣松 聖人,雁木 卓,今村 和孝,東川 甲平,井上 昌睦,木須 隆暢,飯島 康裕,齋藤 隆,飛田 浩史,吉積 正晃,和泉 輝郎, 磁化緩和測定によるBHO添加GdBCO線材の超低電界特性の評価, 第59回応用物理学関係連合講演会, 2012.03. |
277. | 奥村 慶太郎,東川 甲平,塩原 敬,今村 和孝,井上 昌睦,木須 隆暢,木村 一成,小泉 勉,青木 伸夫,吉積 正晃,和泉 輝郎, 磁気顕微法をリール式線材送り機構に適用したREBCO線材の非接触局所臨界電流特性評価, 第59回応用物理学関係連合講演会, 2012.03. |
278. | 雁木 卓,廣松 聖人,今村 和孝,東川 甲平,井上 昌睦,木須 隆暢,飯島 康裕,斎藤 隆,飛田 浩史,吉積 正晃,和泉 輝郎, 角度依存磁気モーメントベクトル測定によるGdBCO線材の臨界電流密度特性の評価, 第59回応用物理学関係連合講演会, 2012.03. |
279. | 木須 隆暢,東川 甲平,井上 昌睦,松本 要,吉田 隆,一瀬 中,向田 昌志, 磁気顕微法によるFe(Te0.5Se0.5)薄膜の面内Jc, Tc分布の評価, 第59回応用物理学関係連合講演会, 2012.03. |
280. | 東川 甲平, 今村 和孝, 井上 昌睦, 木須 隆暢, 淡路 智, 渡辺 和雄, 飛田 浩史, 衣斐 顕, 吉積 正晃, 和泉 輝郎, PLD-GdBCO線材へのBaHfO3人工ピン導入がマグネット応用に与える効果についての検討, 平成24年電気学会全国大会, 2012.03. |
281. | Takanobu Kiss, The current status and future prospect of HTS power applications and wire technologies in Japan (invited, plenary talk), KEPCO Jeju Workshop on Superconducting Power Cable, 2012.03. |
282. | 木須隆暢, 中性子照射による 超伝導特性変化機構の解明, 平成24年度LHD計画共同研究成果報告会(炉工学分野), 2013.01. |
283. | T. Kiss, K. Higashikawa, M. Inoue, H. Tobita, T. Machi, M. Yoshizumi, T. Izumi, Y. Iijima, T. Saito, K. Ohmatsu, S. Awaji, K. Watanabe, Recent Progress of Electromagnetic Characterization Techniques to Realize High Performance RE-123 Coated Conductors (Invited), Electronic Materials and Applications 2014 (EMA2014), 2013.01. |
284. | 木須隆暢, 超伝導体の電磁特性、臨界電流特性(Invited), 第1回超伝導科学技術セミナー ~若手技術者向け講習会~, 2013.02. |
285. | 木須隆暢,東川甲平,井上昌睦,Alberto Sala,Marina Putti,Carlo Ferdeghini, 磁気顕微法によるFe(Se0.5Te0.5)バルクの粒間、粒内Jcの評価, 2013年 第60回応用物理学会春季学術講演会, 2013.03. |
286. | T. Kiss, K. Higashikawa, M. Inoue, Recent Advancement of the Characterization Technology for Visualizing Local Electromagnetic Properties in Superconducting Forefront Materials (Invited), 2013 MRS Spring Meeting, 2013.04. |
287. | 木須 隆暢, 先進高温超伝導コート線材の開発を支えるレーザ技術-製造・加工・特性評価におけるレーザ応用-(Invited), 電気学会サステナブル・先端応用へ向けたレーザプロセシング技術調査専門委員会、7回調査専門委員会, 2013.06. |
288. | T. Kiss, K. Higashikawa, M. Inoue, K. Kimura, T. Koizumi, N. Aoki, K. Katayama, Y. Takagi, T. Yoshida, A. Ibi, M. Yoshizumi, T. Izumi, Y. Shiohara, Spatial Homogeneity of Critical Currents in Long RE-123 Coated Conductors, Cryogenic, Engineering Conf. and Int. Cryogenic Materials Conf. (CEC/ICMC), 2013.06. |
289. | Takanobu Kiss, Advancement and Future Prospects of RE-123 Coated Conductor Development in Japan (Invited), TCSHU Special Semina, 2013.07. |
290. | T. Kiss, Evaluation of Local Electromagnetic Properties in Superconducting Forefront Materials for the Understanding of Current Limiting Mechanism (Invited), 16th US-Japan Workshop on Advanced Superconductors, 2013.07. |
291. | T. Kiss, T. Izumi, Y. Iijima, Y. Shiohara, Recent advancement in laser processing of long-length high-performance RE-123 superconducting wires (Invited), The 14th International Symposium on Laser Precision Microfabrication (LPM 2013, part of LAMP 2013), 2013.07. |
292. | T. Kiss, K. Higashikawa, K. Okumura, K. Shiohara, M. Inoue, A. Ibi, M. Yoshizumi, T. Izumi, Y. Shiohara, K. Kimura, T. Koizumi, N. Aoki, Development of reel-to-reel high speed scanning Hall-probe microscope system as a diagnostic method of long RE-123 coated conductors, 11th European Conference on Applied Superconductivity, EUCAS2013, 2013.09. |
293. | Takanobu Kiss, Kohei Higashikawa, Gracia Kim, Masayoshi Inoue, Recent progress after 2nd meeting, 3rd Meeting of SUPER-IRON, 2013.09. |
294. | Takanobu KISS, Kohei HIGASHIKAWA, Masayoshi INOUE, Shujun YE, Akiyoshi MATSUMOTO, Hiroaki KUMAKURA, Current limiting obstacle in a multi-filamentary MgB2 wire fabricated by the internal-Mg-diffusion-process with SiC addition, 7th Asian Conf. on Applied Supercond. and Cryogenics, (ACASC 2013), 2013.10. |
295. | Takanobu Kiss, Recent progress of R&D on HTS technologies in Japan as potential breakthrough for electric power networks linking renewable energy resources (Invited), Workshop on Super Grid for Northeast Asia, 2013.11. |
296. | T. Kiss, K. Higashikawa, M. Inoue, A. Ibi, T. Yoshida, T. Machi, M. Yoshizumi, T. Izumi Y. Shiohara, K. Kimura, T. Koizumi, N. Aoki, T. Hasegawa, Y. Shingai, M. Konishi, K. Ohmatsu, SPATIAL HOMOGENEITY OF LONG LENGTH RE-123 COATED CONDUCTORS (Invited), 26th Int. Sympo. on Superconductivity (ISS2013), 2013.11. |
297. | 木須 隆暢、東川 甲平、山本篤史、葉 術軍、松本 明善、熊倉 浩明, 内部Mg拡散法によって作製された MgB2線材の局所臨界電流分布の 評価と電子顕微鏡観察による 特性制限因子の解明(Invited), 平成25年度第2回「MgB2および鉄系超伝導材料の特性制御に関する調査研究会」, 2013.12. |
298. | 木須隆暢, HTS線材開発の現状(Invited), 未踏科学技術協会超伝導科学技術研究会第82回ワークショップ「超伝導電磁石の大型化への挑戦」, 2013.12. |
299. | 木須隆暢,和泉輝郎,飯島康裕,塩原 融, レーザープロセシング技術による先進高温超伝導線材の開発 (Invited), レーザー学会創立40周年記念学術講演会 第34回年次大会, 2014.01. |
300. | T. Kiss, K. Higashikawa, S. Gangi, K. Imamura, M. Inoue, T. Taneda, A. Ibi, T. Yoshida, M. Yoshizumi, T. Izumi, Y. Shiohara, K. Kimura, T. Koizumi, N. Aoki, T. Hasegawa, Improvement of Spatial Homogenelty and In-field Critical Current in RE-123 Coated Conductors (Invited), Electronic Materials and Applications 2014 (EMA2014), 2014.01. |
301. | T. Kiss, T. Izumi, Y. Iijima, Y. Shiohara, Development of high Tc superconducting coated conductors based on laser processing technologies (Invited), 2014 Photonic West, Laser Applications in Microelectronic and Optoelectronic Manufacturing (LAMOM) XIX, 2014.02. |
302. | 木須隆暢,東川甲平,井上昌睦,葉 術軍,松本明善,熊倉浩明,吉積正晃,和泉輝郎, ハイブリッド顕微法による先進超伝導材料の電流制限因子の解明と高性能化 (Invited), 2014年 第61回応用物理学会春季学術講演会 超伝導分科企画シンポジウム「評価る(はかる)―超伝導材料の評価技術 基礎から応用までー」, 2014.03. |
303. | T. Kiss, Spatial Homogeneity and In-Field Current Carrying Capability of RE-123 Coated Conductors (invited), 4th International Conference on Superconductivity and Magnetism, ICSM 2014, 2014.04. |
304. | 木須 隆暢、東川 甲平、葉 術軍、松本 明善、熊倉 浩明, MgB2線材における局所電流分布と微細組織 (invietd), 液体水素冷却MgB2超電導線の開発と応用に関するフォーラム, 2014.07. |
305. | T. Kiss, K. Higashikawa, M. Inoue, A. Ibi, T. Yoshida, T. Machi, M. Yoshizumi, T. Izumi, Y. Shiohara, K. Kimura, T. Koizumi, N. Aoki, T. Hasegawa, Statistical Behavior of Local Critical Current Fluctuation in Long Length RE-123 Coated Conductors, Applied Superconductivity Conference 2014, ASC 2014, 2014.08. |
306. | T. Kiss, Challenges in HTS Conductor Development for Energy Applications (invited), Applied Superconductivity Conference 2014, ASC 2014, 2014.08. |
307. | T. Kiss, Y. Onodera, S. Gangi, K. Imamura, K. Higashikawa, M. Inoue, M. Yoshizumi, M. Yoshizumi, T. Izumi, T. Izumi, Magnetic Moment Relaxation in RE-123 Coated Conductor Tapes under Inclined External Fields, Applied Superconductivity Conference 2014, ASC 2014, 2014.08. |
308. | T. Kiss, Characterization of Ic homogeneity in long length commercial Bi-2223 tape, Internaltional Union of Materials Research Societies - The IUMRS International Conference in Asia 2014, IUMRS-ICA2014, 2014.08. |
309. | 木須隆暢,東川甲平,井上昌睦,木村一成,小泉勉,青木伸夫,衣斐顕,吉積正晃,和泉輝郎, REBCO線材の局所臨界電流分布に対する空間周波数解析, 第75回 応用物理学会秋季学術講演会, 2014.09. |
310. | 木須 隆暢, 東川 甲平, 上津原 大, 西浦 陽平, 井上 昌睦, 衣斐 顕, 木村 一成, 吉田 朋, 町 敬人, 吉積 正晃, 和泉 輝郎, 塩原 融, 長尺RE-123線材における局所Ic揺らぎの統計的振る舞い, 2014年度秋季低温工学・超電導学会, 2014.11. |
311. | T. Kiss, Challenges in RE-123 Coated Conductor Development–From the View Point of Electromagnetic Characterization– (Plenary talk), 27th Int'l Sympo. on Superconductivity (ISS2014), 2014.11. |
312. | T. Kiss, Spatial variation of local critical current density in long length RE-123 coated conductor (invited), International Workshop on Coated Conductors for Applications 2014 (CCA 2014), 2014.12. |
313. | T. Kiss, Invitation to Kyushu University/ Introduction of Measurement & Instrumentation Laboratory (invited), Special Seminar at Changwon National University, 2014.12. |
314. | 木須 隆暢, 超伝導技術で拓くグリーンイノベーション, 平成26年度九州パワーアカデミーフォーラム, 2014.12. |
315. | 木須 隆暢, 東川 甲平, 井上 昌睦, REBCO線材のIc統計分布に対する試料長ならびに空間解像度の影響, 第62回応用物理学会春季学術講演会, 2015.03. |
316. | T. Kiss, K. Higashikawa, M. Inoue, H. Kitaguchi, Non-destructive characterization of local Ic variation in a long length Bi-2223 tape, Cryogenic Engineering Conference and International Cryogenic Materials Conference, 2015.06, [URL], Spatial homogeneity of critical current, Ic, is one of the most important performances of practical HTS tapes. Such Ic homogeneity is typically characterized by the reel-to-reel transport measurement with a tap distance of several tens cm to several m. However, the spatial resolution is not enough in the conventional method to detect local Ic drop, especially in the case of Bi-2223 tape because of a small shunt resistance of the Ag sheath. In this study, we have succeeded in measuring in-plane Ic distribution in a commercial 100-m-class Bi-2223 tape with non-contact and non-destructive manner by using reel-to-reel high speed scanning Hall probe microscopy. This allows us to measure high resolution remanent flux image on the tape surface in liquid nitrogen bath with a spatial resolution of 34 um in width and 830 um in length. Traveling speed of the tape during the measurement was 36 m/h at maximum. By solving the inversion problem, we obtained in-plane Ic distribution in the tape. We have succeeded in analyzing Ic fluctuation over multi-scale length more than 5 decades. To check the validity of the Ic value, we also carried out site-specified four-probe measurements, then confirmed that these two measurements showed good agreement each other. Statistical behavior of the Ic fluctuation and the correlation with microstructure will be discussed. Acknowledgements: This study was supported by the “JST: S-Innovation” and "JSPS: KAKENHI (24360122)”.. |
317. | Takanobu Kiss, 医療用マグネット応用に向けた高温超伝導線材の評価技術開発と線材性能の向上, 東北・北海道支部/第2回材料研究会/第2回超電導応用研究会合同シンポジウム, テーマ:「医療用超伝導マグネットと超伝導材料」, 2015.08, 酸化物高温超伝導体(HTS)は、高い臨界温度に加え、従来の金属系超伝導材料を遙かに凌駕する高磁界特性を有することから、液体ヘリウムフリーの環境下で動作可能な医療用MRIマグネットや医療用加速器用マグネットなどへの適用が期待されている。近年、磁界下の電流輸送性能の向上と共に、数100 m~km級の長尺線材が実現され、プロトタイプ機器の研究開発が国内外において加速している。 一方で、以下に述べる様な、HTS特有の問題も顕在化しており、今後の研究開発における喫緊の課題といえる。超伝導線材の実用性能を決定づける最も重要な材料パラメータは、電気抵抗ゼロで輸送できる電流の最大値(臨界電流:Ic)である。超伝導線材のIc値は、典型的には、四端子法によって試料全体の平均電界が1 uV/cm(10-4 V/m)あるいは1 uV/mに達するときの電流値として評価され、臨界電流密度Jcは超伝導領域の断面積あたりの電流密度として定義される。しかしながら、HTSの磁束フロー領域への遷移はなだらかで有り、Jc値は電界基準Ecによってかなり変化する。MRIに代表される定常磁界を用いる直流応用においては、線材内に誘起される電界は典型的には10-10 V/m以下であり、四端子法のEcに比べ何桁も小さい。高温超伝導体の電界―電流密度(E-J)特性は四端子法による測定結果よりパワー則: E(J)=Ec (J/Jc)n によって近似されることが多いが、果たしてこの様な超低電界領域においてパワー則による近似が妥当か否かについて十分に解明されていない。また、機器応用の観点からは冷熱発生や使用磁界、運転温度を最適化した設計が求められるが、電流輸送特性は温度、磁界によって複雑に変化する事から、これらを広い運転条件下において定量的に把握する事が必要である。一方、一般の商用線材の性能指標としては液体窒素温度、自己磁界下のIc値が示される場合がほとんどであり、実際の運転環境下の特性把握に対して十分応えきれていない。さらに、材料開発の観点からも、ナノ組織制御による人工ピン止め点(APC)を効率良く導入し、磁界下の電流輸送性能の向上が求められるが、広い動作条件下における定量的な特性比較が不可欠である。 HTS線材を用いた医療用超伝導マグネット開発で特に重要なのは、テープ状の線材形状に起因する問題である。マグネット巻線内の素線の幅広面に垂直印加される磁界により遮蔽電流が誘起され、すなわち、素線の磁気モーメントによるマグネット磁界の空間均一性ならびに時間的安定性に影響を及ぼす。素線の磁気モーメントの大きさは、超伝導層の線幅に比例する事から、素線の細線化やスクライビングによるマルチフィラメント加工の必要性が指摘されている。その為には、テープ線材そのものの高度な空間均一性の確保が重要となることは勿論のこと、加工プロセス技術の開発が必要である。また、巻線精度の向上のためには、テープ線幅の幾何学的な均一性は勿論のこと、電磁気的なテープ線幅の均一性が不可欠となる。一方、上述の通り、一般的なIc評価手法においては、マクロスケールの平均量として定義されているに過ぎず、上述した問題点に対する解決策は勿論のこと、その為の評価法すら十分に確立出来ていない。特に、線材は本質的には一次元の電流輸送媒体である事から明らかなとおり、最小のIc値が全体の性能を決定する。また、希土類系高温超伝導(RE-123)線材では積層プロセスを用いている事からプロセスそのものがシーケンシャルであって、高性能化のためには作製プロセスとの関連も含めた電流制限因子の解明が極めて重要となる。この事はまた、応用側からも重要な視点で有り、現状のHTS線材の不安定性をも定量的に理解した上で、設計に上手く反映させる工夫が求められよう。 本講演では、以上の様な問題意識のもと筆者等がこれまで取り組んできた、HTS線材の各種評価技術について述べると共に、これらの特性評価の視点から、HTS線材性能の現状について概説する。 . |
318. | T. Kiss, Measurement techniques for superconducting materials , The 1st Japan-Korea Superconductivity Summer School, 2015.08. |
319. | T. Kiss, M. Inoue, K. Higashikawa, K. Imamura, M. Yoshizumi, T. Izumi, Multi-Scale Hybrid Microscopy to Visualize Current Blocking Obstacles in a Long GdBCO Coated Conductor Tape, The 11th Pacific Rim Conference of Ceramic Societies, Symposium 20: Recent Advances in High Temperature Superconductors, 2015.09, [URL], To investigate the current limiting mechanism in a long coated conductor (CC) tape, we have developed hybrid microscopy technique combining reel-to-reel scanning Hall probe microscopy (RTR-SHPM) and X-ray microtomography (X-ray-CT). While the RTR-SHPM allows us to map a high resolution 2D critical current density (Jc) distribution in the tape surface up to 1 km of length with non-contact and non-destructive manner, the X-ray-CT can visualize 3D microstructure inside the tape with micro-meter resolution. Because the CC tape is essentially an 1D current transport media, a local bottleneck limits the performance of the whole CC tape. Namely, the bottleneck engineering becomes crucial to realize a high quality CC in a practical level. However, the present characterization techniques such as reel-to-reel transport measurement and 1D Hall mapping do not have enough spatial resolution to detect in-plane local obstacles in the tape. Furthermore, the relationship between a process condition and the limiting factor is not yet clear. In this study, we have succeeded in visualizing in-plane local Jc drop in a 200-m-long 5-mm-wide commercial GdBCO CC tape using the RTR-SHPM, that is followed by the X-ray-CT analysis to find out microstructural origin of the obstacles. Such hybrid microscopy clearly shows that the local Jc drop is originated from defects on the metal substrate. Note that this approach can cover 9 decades of multi-scale analysis from km to m range with correlating electromagnetic characterization and microstructural analysis. This is a powerful diagnostic tool to improve CC process conditions in a very effective way. Acknowledgements: This work is supported by the Ministry of Economy, Trade and Industry (METI) as the Project for Development of HTS Coiling Technology and JSPS: KAKENHI (24360122).. |
320. | Takanobu Kiss, Panelist for special session on numerical modeling for application: Remarks from the view point of materials characterization, EUCAS 2015, Round table: Modeling for applications, 2015.09, [URL]. |
321. | T. Kiss, T. Takahiro, K. Takasaki, K. Tanaka, M. Inoue, T. Kato, T. Izumi, Y. Shiohara, Influence of Highly Textured IBAD Based Template on In-Filed Current Transport Properties in Gd1Ba2Cu3O7-d Coated Conductors, 12th European Conference on Applied Superconductivity, EUCAS2015 , 2015.09, [URL], It is well established that in-plane alignment is essential to realize high critical current density in coated conductors (CCs) because of grain connectivity. It is also relevant to realize thick film deposition for the superconducting layers to increase overall critical current. The value of in-plane alignment, Df, of the substrate template is typically around 3 to 4 degree. However, the requirement for the substrate alignment is not yet fully understood especially in thick film and its performance. In this study, we have investigated the influence of highly textured IBAD based template on the in-filed current transport properties in Gd1Ba2Cu3O7-d (GdBCO) CCs. As a result of improved selfepitaxy of the CeO2 top layer, Df of the template can be reduced as low as 1.9 degree. We compared in-field critical currents of BaHfO3 doped 1.5 um-thick PLD-GdBCO deposited on such highly textured substrate and standard one, i.e., Df is 3.5 degree. From the analysis of critical current as a function of external magnetic field and temperature, we found that normalized pinning force density curves are scaled on the same curve for both case, however, the maximum value has increased 15 to 20 % for the case of highly textured substrate. This indicates that the nano-structures of the GdBCO layer are hardly influenced by the substrates, whereas effective cross-section area can be improved because of the reduction of current blocking obstacles in the case of highly textured substrate. From SEM observation of the GdBCO surface, it has been also confirmed that outer-growth can be suppressed effectively by using the highly textured substrate. These results show that the improvement of substrate in-plane alignment is still important and effective even in the range of DfAcknowledgements: This work is supported by the Ministry of Economy, Trade and Industry (METI) as the Project for Development of HTS Coiling Technology. . |
322. | T. Kiss, K. Higashikawa, M. Inoue, Takumi Suzuki, K. Imamura, Y. Onodera, D. Uetsuhara, K. Takasaki, A Ibi, T. Izumi, H. Kitaguchi, Comparison between RE-123 and Bi-2223 long length tapes from the view point of current transport properties influencing thermal stability , International Workshop on Cooling System for HTS Application (IWC-HTS), 2015.10. |
323. | T. Kiss, K. Higashikawa, K. Tanaka, K. Takasaki, K. Imamura, M. Inoue, S. Awaji, K. Watanabe, Teruo Izumi, Current Limiting Obstacles in a PLD Processed Commercial Long GdBCO Coated Conductor and Its Influence on In-Field Current Transport Properties , International Conference on Magnet Technology 24 (MT24), 2015.10. |
324. | Takanobu Kiss, Hybrid Microscopy Correlating Local Critical Current Variation and Filament Microstructure in MgB2 Round Wires , 14th International Union of Materials Research Societies-International Conference on Advanced Materials (IUMRS-ICAM 2015) , 2015.10, Because of its round shape and a possible superconducting joint with the highest Tc as a metallic superconductor, MgB2 wire is one of the most promising materials to realize advanced devices such as a liquid He free MRI magnet. However, critical current density of the latest MgB2 wire is not yet high enough for practical application. Namely, it is crucial to clarify the current limiting mechanism in the round MgB2 wires. By combining low temperature scanning Hall probe microscopy (SHPM) and X-ray tomography, we have succeeded in studying correlation between spatial distribution of local critical current density, Jc, and three-dimensional (3D) microstructure of filaments in the wire with non-destructive manner. To realize spatially resolved Jc measurement on magnetic sheath wire, we adopted high field SHPM where we can obtain a magnetic image at an external field higher than the saturation field of the sheath. In parallel, internal filament structure has been investigated in a few mm range with a spatial resolution in m scale by using a high resolution X-ray tomography. 3D analysis by the tomography is powerful to understand internal microstructure of the filaments including defects, cross-sectional area and their statistical variation. Combination of these microscopies allows us to understand the origin of current limit factors such as distortion of the filaments and the difference of microstructure inside the filaments, and their relationship with processing. These analyses are very effective to improve wire performance. This study is supported by the Japan Science and Technology Agency as Advanced Low Carbon Technology Research and Development Program (JST-ALCA) for Superconducting Systems.. |
325. | T. Kiss, K. Higashikawa, M. Inoue, Takumi Suzuki, K. Imamura, Y. Onodera, D. Uetsuhara, K. Takasaki, H. Kitaguchi, A. Ibi, T. Machi, T. Izumi, Local Ic Fluctuation and Its Influence on Global Current-Voltage Characteristics in Long Length HTS Tapes (invited) , 28th International Symposium on Superconductivity (ISS 2015), 2015.11, Spatial homogeneity in long length HTS tapes is one of the most important material performances for practical applications. While in-field current transport properties have been studied widely using short piece samples, local Ic fluctuation and its influence on global current transport properties in long length HTS tapes have not been understood yet. In this study, we carried out spatially resolved Ic measurements on long length HTS tapes, both RE-123 and Bi-2223, by the combination with multiple measurements including reel-to-reel high resolution scanning Hall probe microscopy (RTR-SHPM), four-probe measurements and X-ray tomography. We have investigated statistical behavior of local Ic fluctuation, local microstructural disorder and their influence on current-voltage (I-V) characteristics in the long length HTS tapes. From the analysis over wide range of length scale, the influence of spatial resolution of the measurements and sample length have been discussed from the view point of bandwidth of the spatial frequency, f. When the sample length becomes longer than several cm, the influence of 1/f type fluctuation becomes significant whereas the fluctuation is white noise type in short piece length. It has been shown that such long period fluctuation as 1/f influences transport I-V characteristics in long length tape. Relationship between observed longitudinal Ic distribution by the RTR-SHPM and global I-V characteristics has been derived. Not only monolithic tape strands but also multi-filamentary striated tapes have been studied. Influence of filament width on the Ic fluctuation has been discussed. Acknowledgements: This work is supported by the AMED and the METI as a project of “Development of HTS Coiling Technology”, “JST: S-Innovation” and "JSPS: KAKENHI (24360122, 26630113).”. |
326. | Takanobu Kiss, Nondestructive Characterization of Local Ic Variation in Long Bi-2223 Multi-filamentary Tapes and Correlated Study on Global Current-Voltage Characteristics (Plenary Talk) , 8th Asian Conference on Applied Superconductivity and Cryogenics, 2015.11. |
327. | 木須 隆暢, 東川 甲平, 井上 昌睦, 鈴木 匠, 北口 仁, 長尺高温超伝導線材における電流―電圧特性のマルチスケールモデリング, 2015年度秋季低温工学・超電導学会, 2015.12. |
328. | T. Kiss, M. Inoue, K. Imamura, K. Takasaki, S. Awaji, K. Watanabe, A. Ibi, T. Yoshida, T. Izumi, Analytical Expression of In-Field Current Transport Properties in High- Tc Eu1Ba2Cu3O7-δ Coated Conductor Introduced with BaHfO3 Artificial Pinning Centers , JSAP Kyushu Chapter Annual Meeting 2015, 2015.12. |
329. | Takanobu Kiss, Multi-scale multi-physics analyses of forefront superconducting materials by use of hybrid microscopy (invited), 9th International Conference on Advanced Materials and Devices (ICAMD2015), 2015.12, One of the most important material parameters of superconductors is in-field critical current, Ic, which is the maximum current carried without electrical resistance. While the Ic is governed essentially by nanoscale defects due to flux pinning, current blocking obstacles in longer scale typically m to hundreds of m influence significantly. Such local inhomogeneity, however, cannot be detected by the standard characterization methods such as four probe transport measurement and magnetization measurement because they are both macroscopic measurements assuming sample homogeneity. Furthermore, as an engineering materials, superconducting wires are required to be reproducible with homogeneous performance in km scale. Therefore, multi-scale analysis becomes essential for understanding and resolving key performance issues of superconducting materials. In this study, we have developed novel characterization techniques, which include low temperature laser scanning microscopy, scanning SQUID microscopy and scanning Hall probe microscopy, for spatially resolved measurements of local electromagnetic properties. These techniques allow us to visualize local distribution of electric field, current density and fluxoid dynamics of forefront superconducting materials including Bi-2223 tape, RE-123 tape, MgB2 wire, and iron-base superconductors with high spatial resolution also in long length up to hundreds of meters. Furthermore, site-specified investigation coupled with microstructural analysis such as SEM, TEM and X-ray microscopy clearly shows the current limiting mechanism. These multi-scale multi-physics analyses are very useful to improve process conditions effectively. Acknowledgements: This work is supported by the AMED and the METI as a project of “Development of HTS Coiling Technology”, “JST: S-Innovation”, “JST: ALCA” and "JSPS: KAKENHI (24360122, 26630113).”. |
330. | 木須 隆暢, 鉄系超伝導体の局所電磁特性評価 (Invited), 応用物理学会 超伝導分科会 第52回研究会 『鉄系超伝導体のポテンシャルと今後の展望』, 2015.12. |
331. | Takanobu Kiss, Multi-scale modeling and analysis of current-voltage characteristics in long length HTS tapes (Invited), 26th Internatinoal Cryogenic Engineering Conference- International Cryogenic Materials Conference 2016 (ICEC26-ICMC2016), 2016.03. |
332. | Takanobu Kiss, Recent progress of R&D on HTS technologies in Japan as potential breakthrough for electric power networks (invited), Seminar at KEPCO, 2016.03. |
333. | Takanobu Kiss, Kohei Higashikawa, Masayoshi Inoue, Correlated Study of Local Ic Variation and Microstructural Disorder in a Bi-2223 Long Tape by Use of Hybrid Microscopy: Scanning Hall-Probe Microscopy and X-Ray Tomography, 2016 Materials Research Society Spring Meeting & Exhibit (2016 MRS Spring Meeting & Exhibit), 2016.04. |
334. | 木須 隆暢, 長尺高温超伝導線材の電流輸送特性マルチスケール解析とモデリング, 東北大学金属材料研究所ワークショップ「高温超伝導が拓く先進強磁場科学」, 2016.07. |
335. | Takanobu Kiss, Masayoshi Inoue, Kohei Higashikawa, Teruo Izumi, Hiroaki Kumakura, Hybrid microscopy to visualize current blocking obstacles in forefront superconducting tapes and wires: RE-123 coated conductor, Bi-2223 multi-filamentary tape and MgB2 round wire (invited), 2016 Applied Superconductivity Conference (ASC 2016), 2016.09, Spatial homogeneity is one of the most important requirements for forefront superconducting tapes and wires. To screen out local Ic deterioration in long length HTS tapes, reel-to-reel transport measurement is often adopted with a voltage tap distance of around 1 m in commercial long tapes. In fact, recent commercial products achieved good longitudinal homogeneity with a standard deviation less than 1 % in a piece length of hundreds of meters. For a higher spatial resolution such as 1 mm or less, Hall probe array method is also often applied. They are both fast and useful diagnostic tools, however, essentially 1-dimensional measurements. Therefore, it is not possible to determine an in-plane position of a localized obstacles in the tape. Furthermore, no non-contact method is applicable so far for an iron-sheathed MgB2 round wire because of the magnetization of the sheath material. In this study, we carried out spatially resolved measurements on in-plane Ic drop in a long length RE-123 tape and Bi-2223, both hundreds of meters in length, with high spatial resolution (33 μm in width and 830 μm in length) non-contact non-destructive manner by use of fast scanning reel-to-reel Hall probe microscopy (RTR-SHPM). We have succeeded in detecting localized Ic drop in the long length tapes even though the probability of such drop is less than 0.1 %. To visualize local Ic variation in the iron-sheathed MgB2 round wire, we adopted in-field SHPM which allows us to observe a magnetic image at higher external field than a saturation field of the iron-sheath up to 5 T. From such high field measurement, we’ve succeeded in detecting local Ic variation non-destructive manner. To further understanding of such obstacles, we also carried out microstructural analysis by use of X-ray tomography. This allows us to visualize 3-dimensional internal structure with a spatial resolution of 2 μm. Correlated study between SHPM and X-ray tomography clearly showed the origin of the Ic drop such as obstacles in the substrate, distortion of filaments and clack formation. This can be a very effective diagnostic scheme to improve process conditions for forefront superconducting tapes and wires.. |
336. | Takanobu Kiss, Kohei Higashikawa, Masayoshi Inoue, Takumi Suzuki, Hitoshi Kitaguchi, Teruo Izumi, Multi-scale analysis and modeling of current transport properties in long length HTS tapes under the influence of local Ic fluctuation, 2016 Applied Superconductivity Conference (ASC 2016), 2016.09. |
337. | Takanobu Kiss, Spatially resolved measurements on critical currents in long length HTS tapes: Characterization techniques and related issues for standardization (invited), TC90 Mini-Workshop, 2016.09. |
338. | Takanobu Kiss, Experience with Studies of the Positional Variation of Coated Conductor Properties (invited), Coated Conductors for Applications 2016 (CCA2016), 2016.09, Spatial homogeneity of superconducting properties such as critical current, Ic, n-index, effective tape (or filament) width is one of the most important requirements in coated conductors (CCs) as a reliable engineering materials. For example, a local Ic drop results in a significant enhancement of local electric field, which is several orders higher than that of average value, due to nonlinear current-voltage (I-V) characteristics. Indeed, we can often see an attached data sheet on spatial Ic variation as well as end-to-end Ic value at 77 K for a recent commercial long CC products. Several characterization techniques are proposed in a reel-to-reel manner for spatially resolved measurements of Ic in a long CC. Typically we can classify into two groups, i.e., transport measurement and magnetization measurements, and the latter can be divided into several methods including magneto optical imaging (MOI), Hall-probe array method (TapeStarTM), and scanning Hall-probe microscopy (SHPM). These characterization is relevant as a fundamental quality control for the CCs. However, each technique has quite different spatial resolution (along tape width or longitudinal direction) and electric-field criterion. As a result, the relationship among Ic values obtained by these methods is not yet fully understood. This means that the definition of the spatial homogeneity by using these measurements is not clear neither. Relationship between self-field (s.f.) Ic at 77 K and in-field Ic at low temperature is further important issue because the operation condition of the CCs is not usually 77 K, s.f. whereas lower temperature and higher field. In this talk, I will summarize reel-to-reel characterization techniques on critical currents in long CCs and discuss the influence of spatial resolution, sample length, and electric-field criterion. From the analysis of statistical behavior of the Ic distribution we found that the central limit theorem doesn’t hold in the case of CCs. This is a significant difference from a standard system which can be described by the Gaussian distribution, and must be originated from a strong non-linear relationship of the flux pinning which follows a threshold logic. We also derived a model to describe I-V characteristics, therefore positional variation of n-index, based on the local Ic variation. Validity of the model has been confirmed by the site-specified transport measurements. From in-field measurements on positional Ic variation up to 3 T of perpendicular field, we also show the influence of external magnetic on the correlation between 77 K Ic and low temperature Ic. Such in-field measurement has a good potential as a characterization method to optimize process conditions for nano-structured CCs with artificial pinning centers. Lastly, I will discuss the importance of 2-dimensional characterization of Ic distribution in processed tapes such as multi-filamentary tapes and Roebel strands for advanced applications. These results would be also important issues to be considered for standardization of the Ic characterization in long CCs.. |
339. | Takanobu Kiss, Takahiro Fukuzaki, Shougo Ichimura, Yuta Onodera, Yuhei Nishimiya, Hiroaki Oofuji, Xiang Guo, Kazutaka Imamura, Takumi Suzuki, Kohei Higashikawa, Masayoshi Inoue, Shinji Fujita, Yasuhiro Iijima, Takato Machi, Akira Ibi, Teruo Izumi, Zhenan Jiang, Rodney Badcock, Nicholas Long, In-plane Distribution of Critical Current Density in Long Coated Conductor (invited), 1st Asian ICMC and CSSJ 50th Anniversary Conference, 2016.11, Spatial homogeneity of critical current density, Jc, is one of the most important requirements for practical coated conductors (CCs). Indeed, longitudinal Jc variation is usually characterized in a commercial CC by such method as reel-to-reel transport measurement and magnetization measurement by use of Hall-probe array as a typical method. However, the limiting factor of the positional Jc variation is not yet fully under stood because most of these measurements are essentially one-dimensional measurements. Namely, the spatial resolution along the transverse direction is not enough. Moreover, the behavior at in-field and lower temperature condition is relevant issue since most of the characterization so far is at around self-field (s.f.) and 77 K. In this study, we investigated in-plane distribution of local Jc in long CCs tape by reel-to-reel magnetic microscopy. From statistical analysis of the Jc distribution, we found that the probability density function shows a non-Gaussian type asymmetric distribution. Furthermore, the central limit theorem doesn’t hold. Based on these analysis, we proposed a multi-scale model to describe global current-voltage characteristics. We also succeeded in obtaining in-field Jc distribution up to 3 T of external magnetic field. From the in-field measurements, we investigated the influence of processing for artificial pinning center (APC) addition. The relative standard deviation increases slightly in the case we added APC as shown in Fig. 1. The influence of external magnetic field on the correlation between Jc at 77 K and that of lower temperature has also been studied. Lastly, the in-plane characterization in more complicated tape architectures such as multi-filamentary tape and Roebel strands has been carried out. Microstructural origin of current blocking obstacles has been investigated by site-specified analysis combined with the magnetic microscopy and X-ray micro-tomography.. |
340. | Takanobu Kiss, Development of Characterization Techniques for Tailoring HTS Conductors as Engineering Materials (invited), Joint KU-VUW Workshop 2016 - Science, Engineering and Applications of Electric and Electronic Materials-, 2016.11. |
341. | Takanobu Kiss, Kohei Higashikawa, Takumi Suzuki, Masayoshi Inoue, Teruo Izumi, Yasuhiro Iijima, Comparison among Spatially Resolved Measurements of Critical Currents in High- T c Superconducting Long Tapes, The 1st Asian Applied Physics Conference, 2016.12. |
342. | Takanobu Kiss, Kohei Higashikawa, Takahiro Fukuzaki, Yuta Onodera, Takumi Suzuki, Masayoshi Inoue, Takato Machi, Akira Ibi, Teruo Izumi, Statistical Behavior of Positional Variation Critical Current Density in Long RE-123 Coated Conductors, 29th International Symposium on Superconductivity (ISS2016), 2016.12. |
343. | 木須 隆暢, Development of Forefront Superconducting Materials for Next Generation Electric Energy Systems (invited), 2017.03, Development of Forefront Superconducting Materials for Next Generation Electric Energy Systems Takanobu Kiss Dept. of Electrical Engineering, Kyushu University, Fukuoka 819-0395, JAPAN Superconducting materials can curry more than hundreds of times larger currents than that of normal conductors such as copper and aluminum with almost no dissipation. This allows us to realize high field magnets and/or high current cables. Indeed, superconducting technologies have already been utilized widely in such systems ad MRI, NMR, accelerator and nuclear fusion reactor. In the conventional superconducting devices, however, operation temperature is limited close to 4.2 K or lower realized with liquid helium. Namely, it requires complicated- and expensive-cooling systems. This prevents industrial applications of the superconducting technologies so far. Recent significant progress of cuprate superconductor tapes, however, have opened a new era of the superconducting technologies for industrial applications. This year is the 30 years anniversary of the discovery of Y-Ba-Cu-O and Bi-Sr-Ca-Cu-O superconductors both exhibit superconductivity in liquid nitrogen temperature (77 K), i.e., critical-temperature (Tc) are >90 K, and >110 K, respectively. After the 30 years research and development, high performance long wires have been marketed. In this lecture, I will talk about the recent progress of high Tc cuprate superconductor tapes and their electric-power device applications. Challenges in other potential materials will also be mentioned. Our study focuses on understanding and resolving key performance issues of these forefront superconducting materials and their application to the advanced electric energy systems. Perspectives of these studies are to lead breakthrough to energy-efficiency solutions in electric grid systems, alternative energy and transportation systems. . |
344. | Takanobu Kiss, Kohei Higashikawa, Takumi Suzuki, Takahiro Fukuzaki, Daiki Tsujino, Yuta Onodera, Masayoshi Inoue, Description of temperature-, magnetic-field, and position-dependent current-voltage characteristics in high Tc superconducting long length coated conductors, CEC-ICMC 2017, 2017.07, In-field current transport property is one of the most important properties of high Tc superconducting tapes for practical applications. Usually the current-voltage (I-V) characteristics or critical current (Ic) are characterized by the four probe transport measurement or magnetization measurement using a short piece sample. In a practical application, however, the piece length of the tape strands reach more than hundreds of meters or km scale. This indicates that the influence of positional variation of Ic should also be taken into account to describe the I-V characteristics in a real device. In fact, the characterization of spatial Ic variation attracts much attention as a quality control of the long length tapes. However, the relationship between the spatial Ic variation and the local- and/or global-I-V characteristics are not well established. In this study, we have succeeded in measuring in-field Ic variation as a function of longitudinal coordinate, x, in reel-to-reel manner under external magnetic fields up to 4 T at 77 K and 65 K, respectively. We also obtained position-dependent I-V characteristics by site specified transport measurements using the same sample. We proposed an analytical model to describe the position-dependent I-V characteristics based on the Ic(x) in the long length tape. It has been shown that the analytical expression shows good agreement with the position-dependent in-field transport measurements. Namely, this approach allows us to describe the I-V characteristics as function of B, T, and x including position dependent n-index and localized flux flow dissipation in the long length tape. Acknowledgements: This work was supported by “JSPS KAKENHI (16H02334)”.. |
345. | 木須 隆暢, Y系線材を語る, 一般社団法人 未踏科学技術協会 超伝導科学技術研究会主催 第92回ワークショップ「超伝導線材を語る~使われる線材とは~」 , 2017.07, Present status and future prospects of REBCO superconducting wire development have been discussed. In-field critical current (Ic) of REBCO can be increased significantly by introducing artificial pinning centers, i.e., the effectiveness of the APC is the advantage of REBCO. Enhancement of in-field Ic would be a key factor to reduce technical cost of the CCs. However, it should be noted that the influence of flux creep suppresses the attainable Ic at low electric field region which becomes relevant especially in DC magnet application such as NMR and MRI. Uniformity of the Ic in long length CCs is also influenced by the APC addition. Modeling of current transport properties under the influence of thermal fluctuation and spatial Ic variation in long length wires has been developed. From the analysis,it has been shown that PLD has a good potential for the production of homogeneous REBCO in long length. Flux pinning behavior is quite stable and reproducible. This suggests that the nano-scale microstructures are reproducible in the process, whereas a macroscopic defects cause spatial variation of effective cross section area in a long length tape. Beyond the critical current, realization of such architecture as narrower-tape-width, multi-filamentary and Roebel tape strand would become next issues for practical power applications.. |
346. | Takanobu Kiss, Electrical Characterzation, The 2nd Asian Superconductivity Summer School (AS3 2017), 2017.08. |
347. | Takanobu Kiss, Takumi Suzuki, Kohei Higashikawa, Takahiro Fukuzaki, Yuhei Nishimiya, Daiki Tsujino, Shohei Noda, Yuta Onodera, Masayoshi Inoue, Mitsunori Igarashi, Kazuomi Kakimoto, Yasuhiro Iijima, In-field Characterization of Local Ic and n-indices as a Function of Longitudinal Coordinate in a Long-length GdBCO Coated Conductor, International Conference on Magnet Technology 25 (MT25), 2017.08. |
348. | 木須 隆暢, 玉江 航稀, モハン シャム, 坊地 修平, 東川 甲平, 井上 昌睦, 黄 河, 姚 超, 馬 衍偉, ホットプレス(Ba, K)Fe2As2銀シース線材の磁場中磁気顕微観察, 第78回応用物理学会秋季学術講演会, 2017.09. |
349. | 木須 隆暢, 高温超伝導技術の応用動向(invited), 艦船磁気・水中電界研究会 合同事業研究会, 2017.09. |
350. | Takanobu Kiss, HTS Tapes Development in Japan: Fundamentals and Recent Progress (invited), Special at Changwon National University, 2017.10. |
351. | Takanobu Kiss, Yuta Onodera, Shohei Noda, Kohei Higashikawa, Kazutaka Imamura, Kohei Higashikawa, Takumi Suzuki, Masayoshi Inoue, Analysis of Magnetic Moment Relaxation in REBCO Coated Conductors by Use of Hall Probe Magnetometry, The 9th Asian Conference on Applied Superconductivity and Cryogenics (ACASC2017), 2017.11, Magnetic moment in coated conductor (CC) tape is an important issue from both fundamental and application point of view. Because of its flat monolithic architecture, a large magnetic moment is induced in the superconducting layer against perpendicular magnetic field component to the tape surface. Furthermore, such magnetic moment will decay significantly due to flux creep. These influence spatial homogeneity and temporal stability of magnetic field in CC based magnet windings. However, we can also use such magnetic moment to evaluate crucial electromagnetic parameters such as critical currents of the CC with non-contact and non-destructive manner. In typical measurements using magnetometer such as MPMS and VSM, we measure magnetic moment of the whole sample using pick up coil. We can collect, however, much more detailed information if we measure local magnetic field profile in the sample. In this study, we have investigated magnetic moment and its relaxation by use of Hall probe magnetometry. From the time dependent field distribution across the tape width, time evolution of local electric field distribution and a decay of shielding current were obtained based on Faraday’s law and Biot-Savart law, respectively. The results were also compared with that of critical state model and flux creep. One of the important advantages of the Hall probe measurement is to obtain the data including initial state of the flux creep less than 0.1 sec not only the long time relaxation. From these analysis, we have succeeded in obtaining electric field vs. critical current density (E-J) characteristics in the CC over 4 decades of electric fields from 10-6 to 10-10 V/m. Theoretical background for the derivation and comparison with other measurements such as four probe transport measurements and MPMS will be discussed. Acknowledgment: This work was supported by JSPS: KAKENHI (16H02334).. |
352. | 木須 隆暢, 超伝導材料をはじめとする先進機能性材料の特性評価技術, 平成29年度九州パワーアカデミーフォーラム, 2017.11. |
353. | Takanobu Kiss, Yuta Onodera, Shohei Noda, Kazutaka Imamura, Kohei Higashikawa, Takumi Suzuki, Masayoshi Inoue, Spatially Resolved Measurement on Local Electromagnetic Field Distribution in a Long Gd1Ba2Cu3O7-δ Coated Conductor during Magnetic Moment Relaxation by use of Hall Probe Magnetometry, The 2nd Asian Applied Physics Conference, 2017.12. |
354. | Takanobu Kiss, Fundamentals of Superconducting Wires and Tapes (invited), Superconductivity School 2017, 2017.12. |
355. | Takanobu Kiss, Kohei Higashikawa, Takumi Suzuki, Yuhei Nishimiya, Yuta Onodera, Masayoshi Inoue, Mitsunori Igarashi, Kazuomi Kakimoto, Yasuhiro Iijima, Analysis and Modeling of Current Transport Properties in Long Length Coated Conductors(invited), 30th International Symposium on Superconductivity (ISS2017), 2017.12, Current-Voltage (I-V) characteristic is one of the most fundamental properties of superconducting materials for practical applications. While the I-V characteristics are usually measured by using a short piece sample and/or a micro-bridge, practical applications require long length tapes in hundreds of meters to several kilo-meters. Spatial homogeneity becomes an important issue in such cases because the minimum Ic will limit the total performance of the full-length of the tape. Therefore, Ic in the long length tape has been studied significantly as a function of longitudinal coordinate. However, it is not yet fully understood the relationship between the local Ic variation and the global I-V characteristics. In this study, we have investigated current transport properties in long length coated conductors (CCs) based on coupled analysis using reel-to-reel high-speed scanning Hall probe microscopy and site-specified transport measurements. An analytical model to describe the relationship between the local Ic variation and the global I-V characteristics in such long length CCs have been proposed. Furthermore, we will discuss a method to increase reliability, robustness and current carrying capability of the CCs under the influence of spatial Ic variation. Acknowledgements: This work was supported by “JSPS KAKENHI (16H02334)” and “NEDO”.. |
356. | Takanobu Kiss, Recent development of characterization techniques at KU for the development of forefront superconducting wires, 低温工学・超電導学会九州・西日本支部主催 著名外国人研究者による特別講演会, 2017.12. |
357. | Takanobu Kiss, Development of Forefront Superconducting Wires for Next Generation Electric Energy System (Invited), Colloquium, Dept. of Physics, University of Ulsan, Korea , 2018.03. |
358. | Takanobu Kiss, Shuhei Bouchi, Kohei Higashikawa, Masayoshi Inoue, Hiroaki Kumakura, Yanwei Ma , Hybrid Microscopy of MgB2 Round Wires: Combination with X-ray Tomography and Scanning Hall Probe Microscopy, 2018 MRS Spring Meeting & Exhibit, April 2-6, 2018, 2018.04, Combining X-ray tomography and in-field scanning Hall probe microscopy (SHPM), we have succeeded in visualizing local distortion of filaments at both PIT processed- as well as IMD processed-MgB2 wires and their influence on critical current distribution in the MgB2 wires. High resolution X-ray tomography is a powerful tool to investigate filamentary architecture and local distortion such as sausaging effect and exudation of Mg. From the magnetic image of the magnetized MgB2 wire measured by the SHPM, we could evaluate spatial distribution of local critical current density, Jc, according to Biot-Savart law. The in-field SHPM allows us to evaluate critical currents quantitatively of the MgB2 wire with magnetic sheath materials by the measurement where the external magnetic field is higher than the saturation field of the magnetic sheath [1]. The advantage of such magnetic measurements is also to evaluate high current region in which transport method is difficult to apply. Combination with the X-ray tomography and the SHPM leads abundant information on current limiting mechanism of the MgB2 wires by synergistic effect. [1] K. Higashikawa et al., IEEE Trans. Appl. Supercond. 26 (2016) 6200804. This study was supported by Japan Science and Technology Agency (JST) as ALCA. . |
359. | Takanobu Kiss, Challenges in characterization of superconducting properties in HTS tape strands and joints for NMR application, HTS線材の超電導接合・コイル技術に関するセミナー, 2018.04. |
360. | Takanobu Kiss, Diagnostics and Jc-B Characteristics on Most Advanced Coated Conductor (invited), Lecture at Shanghai Superconductor Technology Co., Ltd (SSTC), 2018.05. |
361. | 木須 隆暢, 西宮 悠平, 東川 甲平, 鈴木 匠, 井上 昌睦, 衣斐 顕, 町 敬人, 和泉 輝郎, PETRYKIN Valery, LEE Sergey, Face-to-Face Double Stack (FFDS) 構造を有する1 mm幅細線加工REBCOコート線材の電流―電圧特性, 2018年度春季低温工学・超電導学会, 2018.05. |
362. | Takanobu Kiss, Kohei Higashikawa, Takumi Suzuki, Issues in the Characterization of Current Transport Properties in REBCO Coated Conductors for Various Applications(invited), Shanghai High-Temperature Superconductor Conference 2018 (ShHTS2018), 2018.08. |
363. | Takanobu Kiss, Physical Properties of Superconducting Materials , The 3nd Asian Superconductivity Summer School, AS3 2018), 2018.08. |
364. | Takanobu Kiss, Significant improvement of robustness of current carrying capabilities in coated conductors by use of face-to-face double stacked architecture (invited), Coated Conductors for Applications 2018 (CCA2018), 2018.09, Spatial homogeneity of critical currents in coated conductors (CCs) is one of the most important issues for practical applications because the minimum Ic in a long length CC will limit the total performance of the tape. This becomes crucial especially in narrower and/or multi-filamentary tapes. In this study, we have investigated current transport properties in face-to-face double stacked (FFDS) CCs by measurements and analysis. Starting from a multi-scale modeling of nonlinear current transport properties in a long length CC strand, we developed a method to analyze detailed properties in the FFDS architecture including contact resistance, local electric field distribution and current sharing among the tapes. It has been shown that the total dissipation, i.e., joint resistance depends on Ic variation and its spatial frequency of the CCs. Based on the measurements on local Ic variation in a 1-mm-wide CC by the reel-to-reel scanning Hall probe microscopy, we analyzed the global current-voltage characteristics of the FFDS CCs at various conditions of joining resistance. Critical current density can be increased by a factor of two effectively and the local electric field concentration can be suppressed one order smaller than that of single strand even though at the same end-to-end voltage criterion of 1 uV/cm. From these analyses, we can lead the conclusion that the FFDS architecture is very effective to suppress the influence of local Ic drop and can improve the robustness and reliability of the CCs. Acknowledgements: This work was supported by “JSPS KAKENHI (16H02334)” and partly by JST-Mirai Program Grant Number JPMJMI17A2, Japan.. |
365. | Takanobu Kiss, Yuhei Nishimiya, Kohei Higashikawa, Takumi Suzuki, Masayoshi Inoue, Valery Petrykin, Sergey Lee, Kenji Suzuki, Masaru Tomita, Akira Ibi, Takato Machi, Teruo Izumi, Current transport properties in face-to-face double stacked narrow REBCO coated conductors under the influence of local Ic variation, 2018 Applied Superconductivity Conference (ASC 2018), 2018.10. |
366. | 木須 隆暢, 先進超伝導材料の開発と電気エネルギー応用, 平成30年度高校訪問事業(出前講義), 2018.11. |
367. | 木須 隆暢, 銅酸化物超伝導体ならびに鉄ヒ素超伝導体の線材化研究における最近の進展, 強磁場コラボラトリにおける物性研究の現状と展望, 2018.11. |
368. | Takanobu Kiss, Daiki Tsujino, Yukihisa Kumagai, Takumi Suzuki, Kohei Higashikawa, Valery Petrykin, Sergey Lee, Kenji Suzuki, Masaru Tomita, Akira Ibi, Takato Machi, Teruo Izumi, Analysis of current transport properties in a face-to-face double stacked coated conductors, The 3rd Asian Applied Physics Conference, 2018.12. |
369. | 木須 隆暢, 超電導線材の基礎, 超電導スクール2018, 2018.12. |
370. | Takanobu Kiss, Takumi Suzuki, Shohei Noda, Yuki Yamauchi, Kohei Higashikawa, Wataru Hirata, Shinji Fujita, Yasuhiro Iijima, Markus Bauer, Measurement and analysis of longitudinal Ic variation in long coated conductors fabricated by different processes: IBAD-PLD and ISD-coevaporation methods (invited), The 31st International Symposium of Superconductivity (ISS2018), 2018.12, Spatial homogeneity of critical current, Ic, in a long coated conductor (CC) is one of the most important requirements for practical applications of CC based devices. However, not only fundamental issues such as the origin of the spatial Ic variation and the influence of fabrication processes, but also a measurement method for the longitudinal Ic variation in the long CCs is not yet established as a standard method. In this study, we have carried out spatially resolved Ic measurements of long CCs by use of reel-to-reel magnetization measurements at 77 K self-field and also at 65 K in subcooled LN2 with applying external magnetic fields up to 2 T. Superconducting layers of the samples were deposited by 1) PLD method on an IBAD-MgO template, and 2) coevapolation method on an ISD-MgO template, respectively. In the former case, artificial pinning centers (APC) were also introduced using BaHfO3. It has been shown that behavior of the spatial Ic variation under external magnetic fields are similar even though the microstructures of the CCs are quite different from each other. Namely, positional dependence of the Ic is collapsed on a single curve if it is normalize by the average value of Ic at each magnetic field condition. This indicates that the spatial variation is almost independent from that of magnetic field dependence. This behavior is similar even in the case of APC doped CC in the IBAD-PLD process. This strongly suggests that the spatial Ic variation comes from macroscopic defects and not from the fluctuation of flux pinning behavior controlled by nano-scale defects. This was also confirmed from very similar APC nano-structures obtained by site-specified TEM observations at high- and low- Ic positions, respectively. Lastly, we considered the influence of spatial resolution and electric-field criterion on the Ic measurements in long CCs by typical two methods, i.e., magnetization measurement and transport measurement from the view point of standardization. Relationship between these two measurements has been discussed quantitatively.. |
371. | Takanobu Kiss, Challenges in the characterization of current transport properties in HTS tapes for various applications (invited), Seminar at Changwon National University, 2019.02. |
372. | 木須 隆暢, 東川 甲平, 太田 省吾, 財部 祐輔, 今村 和孝, 三浦 英明, 横山 彰一, MRI用高温超電導高安定磁場マグネットシステム開発(Ⅲ-5) ~大口径REBCOパンケーキコイルの欠陥可視化に関する検討~, 2019年度春季低温工学・超電導学会研究発表会, 2019.05. |
373. | Takanobu Kiss, Recent Progress in Development of Advanced Superconducting Materials in Japan and Outlook on Their Energy Applications (Invited), The 15th National Conference on Superconductivity, 2019.06, This lecture outlines the state of development of advanced superconducting materials, which is promoted in Japan by national projects, mainly from the viewpoint of the electromagnetic characterization developed by the authors, and also describes the energy application based on these materials. Superconducting materials that are currently being vigorously developed in Japan can be summarized on 1) RE-123 coated conductor, 2) Bi-2223 multi-filamentary tape, and 3) MgB2 multi-filamentary round wire. In addition to the wire developments, a new project on joining technology, which is also important as a basic technology for superconducting applications, has been launched. The application of these advanced superconducting materials is expected to realize a liquid helium-free magnet system, a superconducting liquid hydrogen hybrid energy system utilizing cryogenic heat of liquid hydrogen, and a railway electric cable system by liquid nitrogen cooling. In addition, the development of an ultra-high magnetic field NMR system exceeding 1 GHz has been promoted including the persistent current mode operation. In this lecture, novel characterization techniques and the methodology will be described for resolving key performance issues of these advanced superconducting wires which the authors have worked on. The future prospect of the energy applications based on these materials and requirement for the technological development for the next stage will also be discussed. This study is supported partly by “JSPS KAKENHI (16H02334 , 24360122, 23760263)”, by the New Energy and Industrial Technology Development Organization (NEDO) and by JST-Mirai Program Grant Number JPMJMI17A2, Japan.. |
374. | Takanobu Kiss, Kohei Higashikawa, Yukihisa Kumagai, Akihito Ide, Lin Lyu, Kazutaka Imamura, Wataru Hirata, Shinji Fujita, Yasuhiro Iijima, Enhancement of Measurement Speed over 100 m/h in Reel-to-Reel Scanning Hall Probe Microscopy Using a Multi-Channel Array (Invited), The 2019 Cryogenic Engineering Conference and International Cryogenic Materials Conference (CEC-ICMC 2019), 2019.07, In our previous study, we demonstrated that the reel-to-reel scanning Hall probe microscopy (RTR-SHPM) has a good advantage on the measurements of spatially resolved in-plane Jc distribution in a long length HTS tapes with a high spatial resolution along the tape width as well as the longitudinal direction. This is inevitable for a detection of localized defect in the tape, evaluation of an effective tape width, measurement of a very narrow tape and/or multi-filamentary tapes. However, one drawback of this method is its relatively low measurement speed around several tens meter per hour or less. In this study, we have succeeded in increasing the measurement speed significantly by introducing a multi-channel Hall probe array. Namely, we can increase the measurement speed N times faster by using a N-channel sensor array without loosing the spatial resolution. We demonstrated a measurement speed of 108 m/h with a longitudinal spatial resolution of 1 mm by using a 3-channel Hall probe array. From the comparison between the previous single channel measurement and the 3-channel measurement, we confirmed that the multi-channel measurement allows us to obtain the same quality Jc mapping with 3 times faster measurement speed. We can increase the measurement speed further just by increasing the numbers of the channels. Therefore, we believe that this method can be a practical diagnostics for a long length HTS tapes even in an industrial scale. This work was supported by JSPS KAKENHI Grant Number 16H02334 and the New Energy and Industrial Technology Development Organization (NEDO).. |
375. | Takanobu Kiss, Kohei Higashikawa, Shohei Noda, Yukihisa Kumagai, Takumi Suzuki, Kazutaka Imamura, Wataru Hirata, Shinji Fujita, Yasuhiro Iijima, Akira Ibi, Takato Machi, Teruo Izumi , In-Field Current Transport Properties in Long Length IBADPLD REBCO Tapes under the Influence of Local Ic Variation, International Conference on Magnet Technology (MT26), 2019.09. |
376. | Takanobu Kiss, Kohei Higashikawa, Shogo Ohta, Yusuke Takarabe, Kazutaka Imamura, Hideaki Miura, Shoichi Yokoyama, Novel Characterization Technique to Visualize Local Defects in a REBCO Pancake Coil Winding, International Conference on Magnet Technology (MT26), 2019.09. |
377. | 木須 隆暢, 高温超伝導線材の接合特性評価技術(Invited), 第4回 材料研究会/九州・西日本支部合同研究会, 2019.10. |
378. | Takanobu Kiss, Systematization of Characterization Technologies for Forefront Superconducting Materials Development (Invited), The First International Conference on Superconducting and Magnetic Technologies (SMT 2019), 2019.10. |
379. | Takanobu Kiss, Characterization techniques for long length coated conductors and their pancake coil windings (Invited), The 3rd KU-VUW Workshop 2019, 2019.11. |
380. | Takanobu Kiss, Yudai Onitsuka, Taiki Mori, Yuhki Yamauchi, Lin Lyu, Takumi Suzuki, Kohei Higashikawa, Modeling of current transport properties in long length high Tc conductors, The 4th Asian Applied Physics Conference (Asian-APC), 2019.11. |
381. | T. Kiss, Y. Takano, H. Kumakura, J. Shimoyama, K. Matsumoto, Y. Iijima, S. Yokoyama, A. Yamamoto, M. Hidaka, Superconducting Materials Research in MRS-Japan (Invited), 日本MRS創立30周年記念シンポジウム, 2019.11, Research on superconducting materials in MRS-Japan has been promoting broad aspects research from the search for new materials exhibiting higher critical temperature, Tc, to the development of high-performance practical materials and processing technologies, such as wire and bulk materials, joints, high-performance thin films and junctions, as fundamental technologies for highly efficient energy applications as well as electronic applications for sensing and quantum computing. During the last decades, the discovery of different new systems confirmed higher Tc. High critical current density, Jc, is achieved by effective pinning of the quantized vortices formed in the superconductor in magnetic fields. For this reason, researches on nanocomposite superconductors incorporating nanoscale artificial crystal defects have been conducted, and significant performance improvements have been achieved. Advanced material evaluation technology, direct observation of vortices and TDGL simulation technology are also in progress. Practical level of Jc at 20 K is now obtained for MgB2 wires. An iron-based superconductor, (Ba,K)Fe2As2 (Ba-122) are potentially useful for high field applications due to their high upper critical fields of over 50 T and small anisotropy. Jc values of Ba-122 is now reaching to the practical level, leading to high field magnet applications. Developments of long length high-Tc superconducting (HTS) tapes and HTS bulks with high critical current properties have opened new application fields, such as superconducting cables cooled by liquid nitrogen, very high field and/or cryogen-free magnet systems. Recently established superconducting joint technologies connecting HTS tapes will promote developments of magnets equipped with persistent current circuits for NMR and MRI systems. For electronic applications, many Josephson junctions have been researched using HTS and LTS materials. Ramp-edge junction consisting of YBCO and Nb/Al-AlOx/Nb junctions are typical ones. Various applications are developing by the devices, such as mineral resource exploration and microwave filter by the HTS devices and quantum computer and material analysis by the LTS ones. This presentation attempts to review the progress of the research on superconducting materials and to discuss future developments in the superconducting technology.. |
382. | 木須 隆暢, 超電導線材の基礎と応用 (Invited), 第4回超電導スクール(2019), 2019.12. |
383. | Takanobu Kiss, Lin Lyu, Takumi Suzuki, Kohei Higashikawa, Local-vs.-Global Current-Voltage Characteristics in HTS Tapes , The 32nd Internatinal Symposium on Superconductivity (ISS2019), 2019.12. |
384. | Takanobu Kiss, Kohei Higashikawa, Takumi Suzuki, Systematization of Characterization Techniques for High Tc Tape Strands and Coil Windings , The 10th Asian Conference on Applied Superconductivity and Cryogenics (ACASC), 2nd International Cryogenic Materials Conference in Asia (Asian-ICMC), and the CSSJ meeting (10th ACASC/2nd Asian-ICMC/CSSJ Joint Conference), 2020.01. |
385. | 木須 隆暢, 呂 琳, 鈴木 匠, 東川 甲平, Bi-2223線材の局所Jc均一性に対する半田接合補強材の効果, 2020年度春季低温工学・超電導学会研究発表会, 2020.07. |
386. | Takanobu Kiss, Yudai Onitsuka, Zeyu Wu, Kohei Higashikawa,
Taketsune Nakamura, Takato Machi, Akira Ibi, Teruo Izumi, Systematization of Critical Current Evaluation Methods for Long Length High-Temperature Superconducting Wires, The 5th Asian Applied Physics Conference (Asian-APC), 2020.11. |
387. | 木須 隆暢, 超電導線材の基礎, 第5回超電導スクール(2020), 2020.11. |
388. | 木須 隆暢, 楊 明旭, 呉 澤宇, 鈴木 賢次, 東川 甲平, 佐藤 茂, 音波振動による高温超伝導CC線材の半田フリー低抵抗接合, 2020年度秋季低温工学・超電導学会研究発表会, 2020.12. |
389. | 木須 隆暢, 楊 明旭, 鈴木 賢次, 張 佩宏, 川崎 啓太, 東川 甲平, 佐藤 茂, 音波振動による高温超伝導CC線材の半田フリー低抵抗接合(2):曲げ特性, 2021年度春季低温工学・超電導学会研究発表会, 2021.05. |
390. | Takanobu Kiss, Kenji Suzuki, Kohei Higashikawa, Masaru Tomita, Shigeru Sato, Solder-free flexible low resistance REBCO coated conductor joints realized by sound energy bonding process, The Virtual 2021 Joint 23rd Cryogenic Engineering Conference and International Cryogenic Materials Conference (CEC-ICMC 2021), 2021.07. |
391. | Takanobu Kiss, Somjaijaroen Natthawirot, Kanta Yokoo, Kazutaka Imamura, Kohei Higashikawa, For More Robust and Reliable Coated Conductors (Invited), International Workshop on Coated Conductors for Applications 2021 (The Virtual 2021 CCA), 2021.10. |
392. | 木須 隆暢, 超電導線材の基礎 (Invited), 第6回超電導スクール(2021), 2021.11. |
393. | KISS,Takanobu; TAKARABE,Yusuke; SHIGEOKA,Shun; WU,Zeyu; IMAMURA,Kazutaka; HIGASHIKAWA,Kohei; YOKOE,Daisaku; ITOH,Taishi; KATO,Takeharu; MIURA,Hideaki; HATTORI,Taisuke; OYA,Masayoshi; TONOOKA,Shun, Hybrid Microscopy to Clarify Failure Mechanisms of REBCO Tapes in Meter-Class Pancake-Coils, 27th International Conference on Magnet Technology (MT27), 2021.11. |
394. | 木須 隆暢, 今村 和孝, Natthawirot Somjaijaroen, 呉 澤宇, 東川 甲平, リール式磁気顕微鏡観察における深層学習を用いた画像認識による長尺高温超伝導テープ線材中の局所欠陥の自動検出, 第69回応用物理学会春季学術講演会, 2022.03. |
395. | Takanobu Kiss, Peihong Zhang, Yuhsuke Oda, Keita Kawasaki, Zeyu Wu, Kenji Suzuki, Kohei Higashikawa, Shigeru Sato, Novel continuous bending test method applicable to a small diameter less than 10 mm and a development of flexible REBCO joints, 10th MEM Mechanical and Electromagnetic Properties of Composite Superconductors, 2022.07, In this study, bending properties of REBCO tapes and their joints have been investigated by a novel continuous bending property test method of small diameter, and we have succeeded in realizing excellent flexible joining to retain the initial Ic of 95 % or more at the minimum bending diameter of 6 mm. REBCO wire is much superior to BSCCO wire on bending property because of the thin film deposited on the thin substrate. However, the bending test of small diameter has not been sufficiently investigated due to the restriction of the size of the jig, etc. In this study, we proposed a novel bending test method in which REBCO tapes were bent in a loop. Based on image analysis of the loops, we found that the shape of the loop can be described by the clothoid curve in which the curvature linearly changes along the trajectory. This allows us to control the loop diameter by the sample length. Experimental results showed good agreement with that of theoretical analysis. Applying this bending test method, we examined bending characteristics of REBCO tape and bonded samples. While the critical bending diameter was 12 mm in the REBCO tape strand, the bonded samples showed excellent flexibility which surpassed the characteristics of the strand as the position of superconducting layer approaches closer to the neutral line in the bonded sample. We have achieved 6 mm in diameter as the minimum value in the joint. Acknowledgements: This work was supported by JSPS KAKENHI Grant Number JP19H05617.. |
396. | 木須 隆暢, マルチスケール、マルチモーダル計測による希土類系高温超電導コイルの劣化機構解明に関する取組, 電気学会調査専門委員会「希土類系高温超電導コイルの劣化対策」, 2022.07. |
397. | 木須 隆暢, N. Somjaijaroen, 呉 澤宇, 寺崎 拓也, 今村 和孝, 東川 甲平, 深層学習を用いた磁気顕微画像解析による高温超伝導テープ線材の電流阻害因子の可視化, 第83回応用物理学会秋季学術講演会, 2022.09. |
398. | Takanobu Kiss, [Invited] Fundamentals of High-temperature Superconducting Tapes and Their Energy Applications, Tutorial Lecture, National Symposium on Cryogenics and Superconductivity 28(NSC28), 2022.10. |
399. | Takanobu Kiss, [Invited] Recent Advancement of Characterization Technologies to Improve the Quality of High‐Temperature Superconducting Wires and the Reliability of Coil Windings(基調講演), National Symposium on Cryogenics and Superconductivity 28(NSC28), 2022.10, Recent progress of high-temperature superconducting (HTS) wire is significant and commercially available 100’s-meters-class wires show superior homogeneity according to the standard characterization methods such as Hall probe array (TapeStarTM) measurements and/or reel-to-reel four probe measurements. However, the yield of coiling is still not high enough for practical applications especially in large scale HTS based magnets and the mechanism of the failure in the coil winding is not yet clarified. In this study, we have developed characterization techniques to visualize localized current blocking obstacles in long length HTS wires based on magnetic microscopy in conjunction with deep-learning based image analysis. This allows us to detect local obstacles in practical HTS wires and collect information on statistics including obstacle size distribution which were hardly possible to be obtained by the conventional local critical current criterion. In-field current transport properties have also been successfully measured in-situ operand conditions at extremely low electric-field range down to 10-12 V/m, which is inevitable as a base for superconducting magnets in NMR or MRI application. Obtained properties show good agreement with our theoretical model. Local degradation in pancake coil windings has also been visualized. This makes it possible to clarify the degradation mechanisms of the coil windings. Those insights based on the advanced characterization techniques are essential to improve practical HTS wire performances and the reliability of coiling the wires. Acknowledgements: This work was supported by JSPS KAKENHI Grant Number JP19H05617.. |
400. | Takanobu Kiss, Natthawirot Somjaijaroen, Mingyang Gao, Kazutaka Imamura, Zeyu Wu, Kohei Higashikawa, Advancement of magnetic microscopy by introducing deep-learning based image analyses for high performance characterization of REBCO coated conductors, 2022 The Applied Superconductivity Conference (ASC2022), 2022.10. |
401. | 木須 隆暢, [Invited] 超電導線材の基礎, 第7回超電導スクール(2022), 2022.11. |
402. | 木須 隆暢, SOMJAIJAROEN Natthawirot, 今村 和孝, 寺崎 拓也, 呉 澤宇, 東川 甲平, 機械学習を用いた磁気顕微鏡観察による長尺REBCO線材内の局所Ic不均一性の検出:画像分類と物体検出の比較, 2022年度秋季低温工学・超電導学会研究発表会, 2022.12. |
403. | Takanobu Kiss, Natthawirot Somjaijaroen, Kazutaka Imamura, Takuya Terazaki, Zeyu Wu, Kohei Higashikawa, [Invited] Automatic Detection of Local Inhomogeneity in REBCO Coated Conductor by High-Speed Reel-to-Reel Scanning Hall Probe Magnetic Microscopy Coupled with Machine Learning Based Image Analysis(招待講演), 2022 International Forum on Applied Superconductivity and Magnetism, 2022.12. |
404. | 木須隆暢, Natthawirot Somjaijaroen, 呉 澤宇, 今村和孝, 寺﨑拓也, 東川甲平, 機械学習画像解析を導入したリール式高速磁気顕微鏡観察による長尺REBCO高温超伝導線材内の局所欠陥ドメインの自動検出, 令和5年電気学会全国大会, 2023.03. |
405. | 木須 隆暢,張 佩宏,川﨑 啓太,小田 祐輔,呉 澤宇,東川 甲平,鈴木 賢次, 希土類系高温超伝導コート線材のループ状曲げ特性解析と新規連続曲げ試験法の検討, 2023年第70回応用物理学会春季学術講演会, 2023.03. |
406. | 呉 澤宇, 東川 甲平, 木須 隆暢, 磁化緩和測定に基づいた高温超伝導線材の電流輸送特性の非接触・非破壊評価法, 令和5年度九州パワーアカデミー総会およびフォーラムプログラム, 2023.06. |
407. | Zeyu Wu, Kohei Higashikawa, Natthawirot Somjaijaroen, Kazutaka Imamura, Takanobu Kiss, High-resolution Detection of Localized Jc inhomogeneity in long-length REBCO Coated Conductor by Combining Magnetic Microscopy and Deep Learning-based Object Detection, MT-28 International Conference on Magnet Technology, 2023.09. |
408. | Zeyu Wu, K. Higashikawa, A. Queraltó, C. Pop, K. Gupta, X. Obradors, T. Puig, T. Kiss, Spatially Resolved Analysis of Local Jc in a Combinatorial Inkjet Printing for Transient LiquidAssisted Growth Chemical Solution Deposition, The 11th Asian Conference on Applied Superconductivity and Cryogenics / 3rd Asian International Cryogenic Materials Conference(ACASC-Asian ICMC 2023), 2023.10. |
409. | Zeyu Wu, Kohei Higashikawa, Natthawirot Somjaijaroen, Kazutaka Imamura,Takanobu Kiss, Analysis of Current Blocking Obstacles in Long-length Coated Conductors by the Combination of High-Throughput Reel-to-Reel Magnetic Microscopy and Machine Learning, The 36th International Symposium on Superconductivity (ISS2023) , 2023.11. |
410. | 呉 澤宇, Somjaijaroen Natthawirot, 東川 甲平, 木須 隆暢, 機械学習を導入したリール式磁気顕微鏡観察による長尺REBCO線材の局所不均一性の解析:Classification modelとObject detection modelの比較, 2023年度秋季第106回低温工学・超電導学会研究発表会, 2023.12. |
411. | 呉 澤宇, 今村 和孝, 東川 甲平, 木須 隆暢, リール式高速磁気顕微鏡観察と機械学習の融合によるREBCOコート線材の電流阻害因子の解析:線材作製プロセスの違いによる比較検討, 2024年第71回応用物理学会春季学術講演会, 2024.03. |
412. | 木須 隆暢, 呂 琳, 鈴木 匠, 東川 甲平, Bi-2223線材の局所Jc均一性に対する半田接合補強材の効果, 2020年度春季低温工学・超電導学会研究発表会, 2020.07. |
413. | Takanobu Kiss, Yudai Onitsuka, Zeyu Wu, Kohei Higashikawa,
Taketsune Nakamura, Takato Machi, Akira Ibi, Teruo Izumi, Systematization of Critical Current Evaluation Methods for Long Length High-Temperature Superconducting Wires, The 5th Asian Applied Physics Conference (Asian-APC), 2020.11. |
414. | 木須 隆暢, 楊 明旭, 呉 澤宇, 鈴木 賢次, 東川 甲平, 佐藤 茂, 音波振動による高温超伝導CC線材の半田フリー低抵抗接合, 2020年度秋季低温工学・超電導学会研究発表会, 2020.12. |
415. | 呉 澤宇, 田中 佑斗, 東川 甲平, 木須 隆暢, REBCO高温超伝導テープ線材の4.2 K高磁界中の連続Ic測定, 第83回応用物理学会秋季学術講演会, 2022.09. |
416. | Zeyu Wu, Kohei Higashikawa, Takanobu Kiss, Continuous Measurement on Electric-field versus Current-density Characteristics in the Electric-field Window from 10-2 down to 10–11 V/m, 2022 The Applied Superconductivity Conference (ASC2022), 2022.10. |
417. | Z. Wu, N. Somjaijaroen, K. Imamura, T. Terazaki, K. Higashikawa, T. Kiss, Automatic Detection of Ic Inhomogeneity in Long REBCO Tape Combining Deep Learningbased Object Detection and Magnetic Microscopy, The 7th Asian Applied Physics Conference (Asian-APC), 2022.11. |
418. | 呉 澤宇, 岸川 創紀, 東川 甲平, 木須 隆暢, ホール素子磁気顕微法に基づいた広い電界領域10-5 ~ 10-11 V/mに亘る電界電流特性計測, 2022年度秋季低温工学・超電導学会研究発表会, 2022.12. |
419. | 呉 澤宇,田中 佑斗,東川 甲平,木須 隆暢, リール式磁気顕微鏡を用いたダイナミック磁化測定による長尺REBCOテープ線材の局所電界―電流密度特性の連続測定に関する検討, 2023年第70回応用物理学会春季学術講演会, 2023.03. |
420. | 呉 澤宇, 鄭 依城, 東川 甲平, 木須 隆暢, 磁気計測による積層REBCOテープのE-J特性評価, 2023年度春季第105回 低温工学・超電導学会研究発表会, 2023.05. |
学会活動 |
所属学会名
Institute of Electrical and Electronics Engineers
応用物理学会
公益社団法人 低温工学・超電導学会
受賞 |
国際交流奨励賞, 低温工学・超電導学会, 2023.06.
2021年度九州パワーアカデミー教育研究支援助成「研究奨励表彰」, 九州パワーアカデミー, 2023.06.
The 3rd Asian Applied Physics Conference Outstanding Presentation Award, JSAP Kyushu Charpter, 2019.11.
2018年度 公益社団法人 低温工学・超電導学会 九州・西日本支部 支部奨励賞, 公益社団法人 低温工学・超電導学会 九州・西日本支部, 2018.12.
研究資金 |
科学研究費補助金の採択状況(文部科学省、日本学術振興会)
2019年度~2023年度, 基盤研究(S), 分担, 高温超伝導線材・導体・コイル巻線の評価技術の体系化と高信頼性マグネットへの展開.
2023年度~2025年度, 若手研究, 代表, 高温超伝導線材の実用環境下における電流輸送特性の非破壊・非接触計測法の開発.
2022年度~2023年度, 研究活動スタート支援, 代表, 高温超伝導線材の10桁の電界領域に亘る電流輸送特性のオペランド計測とモデリング.
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