| 1. |
Kazuo Nakamura, Yifan Zhang, Takumi Onchi, Hiroshi Idei, Makoto Hasegawa, Kazutoshi Tokunaga, Kazuaki Hanada, Takeshi Ido, Ryuya Ikezoe, , Osamu Mitarai, Shoji Kawasaki, Aki Higashijima, Takahiro Nagata, , Shun Shimabukuro, Quaternion Analysis of Transient Phenomena in Matrix Converter without Zero-Sequence Component, IEEJ PES-IEEE PES Thailand Joint Symposium on Advanced Technology in Power Systems 2023, 2023.03. |
| 2. |
K. Nakamura, Y. Zhanga, T. Onchi, H. Idei, M. Hasegawa, K. Tokunaga,K. Hanada, T. Ido, R. Ikezoe, H. Chikaraishib, O. Mitaraic, S. Kawasaki, A. Higashijima, T. Nagata, S. Shimabukuro
, Quaternion Analysis of Transient Phenomena of Motor-Generator, The 31st International Toki Conference on Plasma and Fusion Research (ITC31), 2022.11. |
| 3. |
Kazutoshi Tokunaga, Kyohei Shindo, Akira Fujimoto, Satoru Matsuo, Hiroaki Kurishita, Takeshi Toyama, Makoto Hasegawa, Kazuo Nakamura, Fracture toughness evaluation of rolled and recrystallized tungsten, ⼤洗・アルファ合同研究会, 2022.09. |
| 4. |
K. Nakamura, Y. Zhanga, T. Onchi, H. Idei, M. Hasegawa, K. Tokunaga, K. Hanada, H. Chikaraishi, O. Mitarai, S. Kawasaki, A. Higashijima, T. Nagata, S. Shimabukuro, Quaternion Analysis of Transient Phenomena in Matrix Converter Based on Space-Vector Modulation, The 30th International Toki Conference on Plasma and Fusion Research, 2021.11. |
| 5. |
K. Tokunaga, K. Shindo, S. Matsuo, H. Kurishita, T. Toyama, A. Kurumada, M. Hasegawa, K. Nakamura, Effects of specimen orientation and recrystallization on fatigue precracking and fracture toughness in ITER specification tungsten, 20th International Conference on Fuion Reactor Materials, 2021.10. |
| 6. |
K. Tokunaga, S. Matsuo, H. Kurishita, S. Nagata, B. Tsuchiya, Q. Xu, M. Tokitani, D. Nagata, M. Hasegawa, K. Nakamura, Combined effects of low energy helium irradiation and tensile strain on surface modification in ITER specification tungsten, 20th International Conference on Fusion Reactor materials, 2021.10. |
| 7. |
Kazuo NAKAMURA, Yifan ZHANG, Takumi ONCHI, Hiroshi IDEI, Makoto HASEGAWA, Kazutoshi TOKUNAGA, Kazuaki HANADA, Osamu MITARAI, Shoji KAWASAKI, Aki HIGASHIJIMA, Takahiro NAGATA, Shun SHIMABUKURO
, Quaternion Analysis of Direct Matrix Converter Based on Space-Vector Modulation, The 29th International Toki Conference on Plasma and Fusion Research, 2020.10. |
| 8. |
Kazutoshi Tokunaga, Satoru Matsuo, Hiroaki Kurishita, Takeshi Toyama, Makoto Hasegawa, Kazuo Nakamura, Observation of fatigue induced precracks and evaluation of fracture toughness in an ITER specification tungsten
, GIMRT Joint International Symposium on Radiation Effects in Materials and Actinide Science: GIMRT-REMAS2020, 2020.09. |
| 9. |
K. Tokunaga, S. Matsuo, H. Kurishita, T. Toyama, M. Hasegawa, K. Nakamura, Fatigue pre-cracking and fracture toughness evaluations in an ITER-grade rolled tungsten plate, The Nineteenth International Conference on Fusion Reactor Material (ICFRM-19), 2019.11. |
| 10. |
Adrian S. Sabau,, Kazutoshi Tokunaga, Michael G. Littletona James O. Kiggans Jr., Charles R. Schaich, Ralph B. Dinwiddie, Daniel T. Moore, Yoshio Ueda, and Yutai Katoh, A 6 MW/m2 High-heat flux Testing Facility of Irradiated Materials using Infrared Plasma-Arc Lamps, The Technology of Fusion Energy (TOFE 2018), 2018.11. |
| 11. |
K. Tokunaga, Effects of helium irradiation on surface modification of tungsten due to tensile stress, 25th Congress of International Federation for Heat Treatment and Surface Engineering, 2018.09. |
| 12. |
K. Tokunaga, S. Matsuo, M. Hasegawa, K. Nakamura, K. Suzuki, M. Yamazaki, T. Toyama, A. Kimura, S. Kondo, O. Hashitomi, T. Ohmura, Impact of high energy ion irradiation on thermal and particle loading properties of plasma facing materials, The 9th Inyernational Symposium of Advanced Energy Science ~Interplay for Zero-Emission Energy~, 2018.09. |
| 13. |
K. Tokunaga, High heat loading properties of tungsten coatings on F82H and bonding with bulk tungsten and F82H, Base of Introducting Talents of Discipline to University for Advanced Clean Energy Materials and Technologu 2018 Academic Symposium on Nuclear Materials, 2018.07. |
| 14. |
K. Ibano, A.S. Sabau, K. Tokunaga, M. Akiyoshi, J.O. Kiggans, C.R. Schaich, D.T. Moore, Y . Katoh , and Y. Ueda , Surface morphology of Tungsten-F82H material after High-Heat Flux Testing using Plasma-Arc Lamps
, 18th International Conference on Fusion Reactor Materials , 2017.11. |
| 15. |
M. Matsuyama, H. Zuzhi, K. Tokunaga, A. Kuzmin, K. Hanada , EFFECTS OF PLASMA EXPOSURE ON TRITIUM RETENTION IN FUSION REACTOR MATERIALS
, 18th International Conference on Fusion Reactor Materials , 2017.11. |
| 16. |
Kazutoshi Tokunaga, Takashi Ukita, Hiroaki Kurishita, Satoru Matsuo, Kuniaki Araki, Makoto Hasegawa, Kazuto Nakamura, EFFECTS OF REPEATED HIGH HEAT LOADING ON SURFACE MODIFICATION OF TUNGSTEN AND TUNGSTEN ALLOYS , 18th International Conference on Fusion Reactor Materials , 2017.11. |
| 17. |
Kazutoshi Tokunaga, Takashi Ukita, Hiroaki Osaki, Hiroaki Kurishita, Satoru Matsuo, Masanori Yamazaki, Katsuya Suzuki, Takeshi Toyama, Kuniaki Araki, Makoto Hasegawa, Kazuo Nakamura, MECHANICAL PROPERTIES OF ITER GRADE TUNGSTEN IN THE STRESS-RELIEVED AND RECRYSTALLISED STATES , 18th International Conference on Fusion Reactor Materials , 2017.11. |
| 18. |
Kazuo Nakamura, Md. Mahbub Alam, YanZheng Jiang, Osamu Mitarai, Kenichi Kurihara, Manabu Takechi, Makoto Hasegawa, Kazutoshi Tokunaga, Kuniaki Araki, Hideki Zushi, Kazuaki Hanada, Akihide Fujisawa, Hiroshi Idei, Yoshihiko Nagashima, Shoji Kawasaki, Aki Higashijima, Takahiro Nagata, Atsushi Fukuyama
, Plasma Equilibrium Based on RF-Driven Current Profile with Toroidal Flow on QUEST , 13th International Symposium on Fusion Nuclear Technology, 2017.09. |
| 19. |
K. Tokunaga, T. Hotta, K. Araki, A. Kurumada, M. Tokitani, S. Masuzaki, K. Ezato, S. Suzuki, M. Enoeda, Akiba, M. Hasegawa, K. Nakamura
, Heat Loading Behavior and Thermomechanical Analyses on Plasma Spray Tungsten Coated Reduced-activation Ferritic/martensitic Steel
, 13th International Symposium on Fusion Nuclear Technology, 2017.09. |
| 20. |
K. Tokunaga, S. Matsuo, K. Araki, M. Hasegawa, K. Nakamura, H. Kurishita, M. Yamazaki, A. Kimura, S. Kondo, O. Hashitomi, T. Ohmura, Impact of high energy ion irradiation on thermal and particle loading properties of plasma facing materials, The 8th International Symposium of Advanced Energy Science ～Interdisciplinary Approach to Zero-Emission Energy～ , 2017.09. |
| 21. |
K. Tokunaga, T. Ukitaa, K. Araki, T. Fujiwara, Y. Miyamoto, M. Hasegawa, K. Nakamura, H. Kurishita, S. Matsuo
, Surface modification of tungsten materials by non-steady state repeated high heat loading and elastic-plastic thermal stress analyses , 22nd International Conference on Plasma Surface Interactions in Controlled Fusion Devices, 2016.05. |
| 22. |
A.S. Sabau, K. Tokunaga, J.J. Henry, J.O. Kiggans, Y. Ueda, L.L. Snead, Y. Katoh, M. Akiyoshi, Degradation of Tungsten Coated Steel During High-Heat Flux Testing Using Plasma-ARC Lamps, 17th International Conference on Fusion Reactor Materials, 2015.10. |
| 23. |
K. Tokunaga, H. Osaki, H. Kuisgita, s. Matsuo, S. Nagata, B. Tsuchiya, M. Tokitani, K. Araki, A. Kawaguchi, T. Fujiwara, M. Hasegawa, K. Nakamura, EFFECT OF LOW ENERGY HELIUM IRRADIATION ON MECHANICAL PROPERTIES OF TUNGSTEN, 17th International Conference on Fusion Reactor Materials, 2015.10. |
| 24. |
K. Tokunaga, T. Ukita, H. Osaki, H. Kurishita, S. Matsuo, A. Kurumada, K. Araki, A. Kawaguchi, T. Fujiwara, M. Hasegawa, K. Nakamura, Evaluation of Mechanical Strength Properties on ITER Grade Tungsten and Application for Thermal Stress Analyses of Divertor Plate, 17th International Conference on Fusion Reactor Materials, 2015.10. |
| 25. |
M. M. Alam, K. Nakamura, F. Xia, O. Mitarai, M. Hasegawa, K. Tokunaga, K. Araki, H. Zushi, K. Hanada, A. Fujisawa, H. Idei,Y. Nagashima, S. Kawasaki, H. Nakashima, A. Higashijima, Comparison of Current Density Profiles Based on Particle Orbit-Driven Current in Steady-State Plasma on QUEST, The 12th International Symposium on Fusion Nuclear Technology, 2015.09. |
| 26. |
K. Nakamura, M. M. Alam, Y. Jiang, O. Mitarai, K. Kurihara, Y. Kawamata, M. Sueoka, M. Takechi, M. Hasegawa, K. Tokunaga, K. Araki, H. Zushi, K. Hanada, A. Fujisawa, H. Idei, Y. Nagashima, S. Kawasaki, H. Nakashima, A. Higashijima, A. Fukuyama, Analysis of Plasma Equilibrium Based on Orbit-Driven Current Density Profile in Steady-State Plasma on QUEST, The 12th International Symposium on Fusion Nuclear Technology, 2015.09. |
| 27. |
Kazutoshi Tokunaga, Hiroaki Osaki, Takashi Ukita, Kuniaki Araki, Tadashi Fujiwara, Makoto Hasegawa, Kazuo Nakamura Hiroaki Kurishita, Satoru Matsuo, Elasto Plastic Analyses of Thermal Stress on Tungsten Divertor Plate Exposed to High Heat Loading, The 12th International Symposium on Fusion Nuclear Technology, 2015.09. |
| 28. |
K. Tokunaga, K. Araki , A. Kawaguchi. M. Hasegawa, K. Nakamura, H. Osaki, H. Kurishita, S. Matsuo, S. Nagata, B. Tsuchiya, M. Tokitani, A. Kimura, S. Kondo, O. Hashitomi, T. Ohmura, Radiation effects on properties of plasma facing materials in fusion reactor, The 6th International Symposium of Advanced Energy Science - Towards the Realization of Zero-Emission Energy -, 2015.09. |
| 29. |
Y. Ueda, A. Sabau, K. Tokunaga, Akiyoshi, K. Ibano, PHENIX Task 1 irradiation matrix, PHENIX Workshop, 2015.05. |
| 30. |
K. Tokunaga, Thermal stress analyses of tungsten divertor plate and heat load tests on tungsten materials using electron beams in Kyushu University, PHENIX Workshop, 2015.05. |
| 31. |
Adrian S. Sabau, Kazutoshi Tokunaga, Jim Kiggans, Evan K. Ohriner, Yutai Katoh, and Lance L. Snead, Facility Status of High-Heat Flux Testing Using Plasma Arc Lamps, 3rd Steering Committee Meeting of PHENIX Program, Georgia Institute of Technology, Atlanta, USA, 2015.02. |
| 32. |
Adrian S. Sabau, Kazutoshi Tokunaga, Jim Kiggans, Evan K. Ohriner, Yutai Katoh, and Lance L. Snead, Accomplishments for Task 1 PHENIX High-Heat Flux Testing Using Plasma Arc Lamps, 3rd Steering Committee Meeting of PHENIX Program, Georgia Institute of Technology, Atlanta, USA, 2015.02. |
| 33. |
Adrian S.Sabau,Kazutoshi Tokunaga, Jim Kiggans, Charles R. Schaich, Evan K. Ohriner, David C. Harper, Yoshio Ueda, Lance L. Snead, High-heat flux Facility for High-Throughput Screening of Irradiated Materials for Fusion Applications using Infrared Plasma Arc Lamps, 21st Topical Meeting on the Technolofy of Fusion Energy,Anaheim, CA,USA, 2014.11. |
| 34. |
K.Tokunaga,K.Araki,H.Osaki,Q.Xu,A.Kimura,S.Kondo,O.Hashitomi,T.Ohmura, Radiation effects on properties of plasma facing materials in fusion reactor, The 5th International Symposium of Advanced Energy Science -Contribution to Zero Emission Energy-, Uji, Kyoto, 2014.10. |
| 35. |
K.Tokunaga,T.Ukita,K.Araki,T.Fujiwara,Y.Miyamoto,M.Hasegawa,K.Nakamura,H.Kurishita,S.Matsuo, Surface modification of tungsten materials by repeated high heat loading, 28th Symposium on Fusion Technolog, San Sebastian,Spain, 2014.10. |
| 36. |
K.Tokunaga,M.Akiyoshi,Y.Ueda, Current status of tungsten related work in J and US - HHF test -, PHENIX Workshop on Planning of Neutron Irradiation Experiments, 2014.09. |
| 37. |
K.Tokunaga,T.Ukita,H.Osaki,H.Kurishita,S.Matsuo,Y.Ueda, Heat load tests of W materials, PHENIX Workshop on Planning of Neutron Irradiation Experiments, 2014.09. |
| 38. |
Adrian S.Sabau,Jim Kiggans,Evan K.Ohriner,Kazutoshi Tokunaga,Yutai Katoh,Lance L.Snead and David C.Harper, Update on High-Heat Flux Testing of Irradiated W-based Materials using Plasma Arc Lamps, Phoenix Task 1 Workshop,Workshop on substantiation for gas-cooled divertor, 2014.06. |
| 39. |
Adrian S. Sabau, Kazutoshi Tokunaga, Yutai Katoh, Lance L. Snead, Scope of Work on High-Heat Flux Testing of Irradiated W-based Materials using Plasma Arc Lamps, Phoenix Task 1 Workshop,Workshop on substantiation for gas-cooled divertor, 2014.06. |
| 40. |
K.Tokunaga,A.S.Sabau,Y.Ueda, High heat loading tests using PAL as US/Japan PHENIX and related research, Phoenix Task 1 Workshop,Workshop on substantiation for gas-cooled divertor, 2014.06. |
| 41. |
K.Tokunaga,M.Matsuyama,S.Abe,S.Nagata,B.Tsuchiya,M.Tokitani,K.Araki,T.Fujiwara,Y.Miyamoto,M.Hasegawa,K. Nakamura,K.Hanada,H.Zushi, Effects of plasma exposure on tritium behavior of long term installed samples on first wall in spherical tokamak QUEST, 21th International conference on Plasma Surface Interaction, 2014.05. |
| 42. |
B.Tsuchiya,S.Bandow,S.Nagata,K.Tokunaga,K.Morita, Temperature dependence on vapor and hydrogen absorption characteristics of lithium-zirconium-oxide, 3td International Conference on the Application of Accelerators in Research and Industry,San Antonio,Texas,USA, 2014.05. |
| 43. |
M. Hasegawa, K. Nakamura, H. Zushi, K. Hanada, A. Fujisawa, K. Matsuoka, H. Idei, Y. Nagashima, K. Tokunaga, S. Kawasaki, H. Nakashima, A. Higashijima, Development of plasma control system for steady state operation on QUEST, 9th Asia Plasma and fusion association Conference, 2013.11. |
| 44. |
K. Tokunaga, M. Matsuyama, S. Abe, S. Nagata, B. Tsuchiya, M. Tokitani, K. Araki, T. Fujiwara, Y. Miyamoto, M. Hasegawa, K. Nakamura, K. Hanada, H. Zushi, Behavior on tritium retention of long term installed samples on first wall in spherical tokamak QUEST, 16th International Conference on Fusion Reactor Materials, 2013.10. |
| 45. |
T. Ukita, K. Tokunaga, H. Kurishita, H. Arakawa, K. Araki, T. Fujiwara, Y. Miyamoto, M. Hasegawa, K. Nakamura, Temperature dependence of tensile strength and fracture surface observation of ITER grade tungsten
, 16th International Conference on Fusion Reactor Materials, 2013.10. |
| 46. |
K. Tokunaga, T. Ukita, H. Kurishita, H. Arakawa, K. Araki, T. Fujiwara, Y. Miyamoto, M. Hasegawa, K. Nakamura, Surface modification by high heat loading and elasto plastic analyses of thermal stress of tungsten materials, 16th International Conference on Fusion Reactor Materials, 2013.10. |
| 47. |
H. Osaki, T. Ukita, K. Tokunaga, K. Araki, T. Fujiwara, M. Hasegawa, K. Nakamura, H. Kurishita, K. Ezato, S. Suzuki, M. Enoeda, M. Akiba, A. Kimura, S. Kondo, O. Hashitomi, T. Ohmura, Property change on plasma facing materials for fusion reactor by high energy ion irradiation, The 4th International Symposium of Advanced Energy Science ～ Principle of Zero-Emission Energy ～, 2013.09. |
| 48. |
K. Nakamura, H. Fujita, X. Liu, E. Xue, O. Mitarai, M. Hasegawa, K. Tokunaga, H. Zushi, K. Hanada, A. Fujisawa, K. Matsuoka, H. Idei, Y. Nagashima, S. Kawasaki, H. Nakashima, A. Higashijima, K. Araki, Matrix Converter Design for Feedback Stabilization of Vertical Position Instability on QUEST, 11th International Symposium on Fusion Nuclear Technology, 2013.09. |
| 49. |
K. Tokunaga, T. Ukita, K. Araki, T. Fujiwara, Y. Miyamoto, M. Hasegawa, K. Nakamura, H. Kurishita, Impact of repeated high heat loading on surface modification of tungsten materials, 11th International Symposium on Fusion Nuclear Technology, 2013.09. |
| 50. |
K. Tokunaga, Y. Ueda, Heat load tests of W materials in task 1 of PHENIX, PHENIX Workshop, Planning of Neutron Irradiation Test, Heat response Modeling and Experiments, 2013.07. |
| 51. |
K. Nakamura, H. Fujita, X. Liu, E. Xue, O. Mitarai, K. Kurihara, Y. Kawamata, M. Sueoka, M. Hasegawa, K. Tokunaga, H. Zushi, A. Fujisawa, K. Matsuoka, H. Idei, Y. Nagashima, S. Kawasaki, H. Nakashima, A. Higashijima, K. Araki, A. Fukuyama, Shape Reconstruction of RF-Driven Divertor Plasma on QUEST, 25th Symposium on Fusion Engineering, 2013.06. |
| 52. |
K. Tokunaga, T. Ukita, H. Kurishita, A. Kuniaki, Y. Miyamoto, T. Fujjiwara, M. Hasegawa, K. Nakamura, Elasto Plastic Analyses of Thermal Stress Induced by High Heat Loading on Tungsten Materials, 25th Symposium on Fusion Engineering, 2013.06. |
| 53. |
德永 和俊, 堀田 智宏, 大塚 哲平, 小林 明, 荒木 邦明, 宮本 好雄, 藤原 正, 長谷川 真, 中村, 江里 幸一郎, 鈴木 哲, 榎枝 幹男, 秋場 真人, 長坂 琢弥, 笠田 竜太, 木村 晃彦, Material behavior on heat loading and hydrogen penetration of vacuum plasma spray tungsten coatings on reduced activation Ferritic/martensitic steel, The International Symposium on Visualization in Joining and Welding Science through Advanced Measurements and Simulation, and 2nd International Workshop "In-situ Studies with Photons, Neutrons and Electrons Scattering" , 2012.11. |
| 54. |
長谷川 真, 中村 一男, 図子 秀樹, 花田 和明, 藤澤 彰英, 松岡 啓介, 御手洗 修, 出射 浩, 永島 芳彦, 德永 和俊, 川崎 昌二, 中島 寿年, 東島 亜紀, Development of plasma control system for divertor configuration on QUEST, 27th Symposium on Fusion Technology (SOFT 2012), 2012.09. |
| 55. |
中村 一男, Xiaolong Liu, Erbing Xue, Fan Xia, 御手洗 修, 栗原 研一, 川俣 陽一, 末岡通治, 長谷川 真, 德永 和俊, 図子 秀樹, 花田 和明, 藤澤 彰英, 松岡啓介, 出射 浩, 永島 芳彦, 川崎 昌二, 中島 寿年, 東島 亜紀, 荒木 邦明, Plasma Shape Reproduction with Two Kinds of magnetic Sensors on QUEST, 27th Symposium on Fusion Technology (SOFT 2012), 2012.09. |
| 56. |
德永 和俊, 堀田 智宏, 荒木 邦明, 宮本 好雄, 藤原 正, 長谷川 真, 中村 一男, 御手洗 修, 車田 亮, 時谷 政行, 増﨑 貴, 江里 幸一郎, 鈴木 哲, 榎枝 幹男, 秋場 真人, Thermomechanical behavior of plasma spray tungsten coated reduced-activation ferritic/martensitic steel, 27th Symposium on Fusion Technology (SOFT 2012), 2012.09. |
| 57. |
薛 二兵, 中村 一男, Luo Jiarong, 劉 暁龍, 御手洗 治, 長谷川 真, 德永 和俊, 図子 秀樹, 花田 和明, 藤澤 彰英, 出射 浩, 永島 芳彦, 川崎 昌二, 中島 寿年, 東島 亜紀, 荒木 邦明, PLASMA START-UP FIELD DESIGN IN EAST AND QUEST, 第９回核融合エネルギー連合講演会, 2012.06. |
| 58. |
大塚 哲平, 田邉 哲朗, 德永 和俊, Retention and Release Mechanisms of Tritium in a Vacuum Plasma-Sprayed Tungsten Coating Exposed to Tritium Plasma, 20th International Conference on Plasma Surface Interactions, 2012.05. |
| 59. |
High heat loading properties on tungsten coated low activation material. |
| 60. |
Surface Modification on Tungsten Materials by Repeated Pulse High Heat Loading
. |
| 61. |
Depth profiling of tritium loaded by DC glow discharge in plasma-sprayed tungsten coating on steel
. |
| 62. |
Evaluation of thermal load characteristic on tungsten plasma facing materials
. |
| 63. |
Material properties of tungsten coated materials. |
| 64. |
Recent accomplishment of PISCES. |
| 65. |
Thermal behavior on tungsten coated reduced-activation ferritic/martensitic steel. |
| 66. |
High heat flux experiment on tungsten and tungsten coated materials. |
| 67. |
Developments of an ELM simulator by applying the NBI system. |
| 68. |
Surface modification on tungsten by high heat flux helium beam irradaiton. |
