九州大学-研究者情報 [山中隆志 (助教) 基幹教育院自然科学実験系部門]

山中隆志（やまなかたかし）

データ更新日：2023.12.12

助教　／　基幹教育院自然科学実験系部門

1 主な研究テーマ

2 従事しているプロジェクト研究

3 研究業績

3.1 原著論文

3.2 総説, 論評, 解説,...

3.3 学会発表等

4 学会活動

4.1 所属学会名

4.2 学会大会・会議・シンポ...

5 研究資金

5.1 科学研究費補助金の採択...

主な研究テーマ

シリコンストリップ検出器を用いたミューオン異常磁気モーメントおよび電気双極子モーメントの測定
キーワード：ミューオン, 異常磁気モーメント, 電気双極子モーメント, シリコンストリップ検出器
2017.05.

従事しているプロジェクト研究

ミュオン異常磁気能率・電気双極子能率の超精密測定
2020.07～2026.03, 代表者：三部勉, 大学共同利用機関法人高エネルギー加速器研究機構, 素粒子原子核研究所, 大学共同利用機関法人高エネルギー加速器研究機構
多くの実験事実と、数学的な整合性を基盤に築き上げられた素粒子標準理論は、様々な素粒子現象を定量的に説明する極めて堅牢な理論である。しかしながら、近年の研究により必然的に素粒子標準理論を超える新しい物理法則（新物理）の存在が要請される。ミュオン異常磁気能率(g－2)は素粒子標準理論よりも大きな値を持つことが示唆されており、新しい測定が求められている。本研究ではJ-PARCの大強度陽子ビームの特徴を最大限に生かし、新しい実験技術と組み合わせることにより、従来とは異なる研究手法によりミュオンg－2および電気双極子能率(EDM)の超精密測定を行い、素粒子標準理論と比較することで新物理の存在に迫る。.

ミュオン異常磁気能率の精密測定による新物理法則の探索
2017.05～2020.03, 代表者：齊藤直人, 大学共同利用機関法人高エネルギー加速器研究機構, 大学共同利用機関法人高エネルギー加速器研究機構.

研究業績

主要原著論文

全てを見る→

1.	Tetsuichi Kishishita, Yutaro Sato, Yoichi Fujita, Eitaro Hamada, Tsutomu Mibe, Tsubasa Nagasawa, Shohei Shirabe, Masayoshi Shoji, Taikan Suehara, Manobu M. Tanaka, Junji Tojo, Yuki Tsutumi, Takashi Yamanaka, Tamaki Yoshioka, SliT: A strip-sensor readout chip with subnanosecond time walk for the J-PARC muon g-2/EDM experiment, IEEE Transactions on Nuclear Science, 10.1109/TNS.2020.3012924, 67, 19, 2089-2095, 2020.07, [URL], A new silicon-strip readout chip named “SliT” has been developed for the measurement of the muon anomalous magnetic moment and electric dipole moment at J-PARC. The SliT chip is designed in the Silterra 180 nm CMOS technology with mixed-signal integrated circuits. An analog circuit incorporates a conventional charge-sensitive amplifier, shaping amplifiers, and two distinct discriminators for each of the 128 identical channels. A digital part includes storage memories, an event building block, a serializer, and LVDS drivers. A distinct feature of the SliT is utilization of the zero-crossing architecture, which consists of a CR-RC filter followed by a CR circuit as a voltage differentiator. This architecture allows generating hit signals with subnanosecond amplitude-independent time walk, which is the primary requirement for the experiment. The test results show a time walk of 0.38 +/- 0.16 ns between 0.5 and 3 MIP signals. The equivalent noise charge is 1547 +/- 75 e- (rms) at Cdet = 33 pF as a strip-sensor capacitance. The SliT128C satisfies all requirements of the J-PARC muon g-2/EDM experiment..
2.	T. Aoyagi, Y. Honda, H. Ikeda, M. Ikeno, K. Kawagoe, T. Kohriki, T. Kume, T. Mibe, K. Namba, S. Nishimura, N. Saito, O. Sasaki, N. Sato, Y. Sato, H. Sendai, K. Shimomura, S. Shirabe, M. Shoji, T. Suda, T. Suehara, T. Takatomi, M. Tanaka, J. Tojo, K. Tsukada, T. Uchida, T. Ushizawa, H. Wauke, T. Yamanaka and T. Yoshioka, Performance evaluation of a silicon strip detector for positrons/electrons from a pulsed a muon beam, Journal of Instrumentation, 10.1088/1748-0221/15/04/P04027, 15, P04027, 2020.04, [URL], A high-intensity pulsed muon beam is becoming available at the at the Japan Proton Accelerator Research Complex (J-PARC). Many experiments to study fundamental physics using this high-intensity muon beam are proposed. An experiment to measure the muon magnetic moment anomaly (g-2) and the muon electric dipole moment (EDM) is one of these experiments and it requires a tracking detector for positrons from muon decay. Fine segmentation is required in a detector to tolerate the high rate of positrons. The time resolution is required to be much better than the muon anomalous spin precession period while a buffer depth of a front-end electronics needs to be much longer than the accelerated muon lifetime. Requirements of this detector also meet requirements of a measurement of the muonium hyperfine structure interval at the J-PARC and another experiment to measure the proton charge radius at Tohoku University. We have developed a single-sided silicon strip sensor with a 190 um pitch, a front-end electronics with a sampling rate of 200 MHz and a buffer memory depth of 8192, and a data acquisition system based on DAQMiddleware for the J-PARC muon g-2/EDM experiment. We have fabricated detector modules consisting of this sensor and the front-end electronics. Performance of fabricated detector modules was evaluated at a laboratory and a beam test using the positron beam at Tohoku University. The detector is confirmed to satisfy all requirements of the experiments except for the time walk, which will be solved by the next version of a front-end electronics..
3.	M. Abe, S. Bae, G. Beer, G. Bunce, H. Choi, S. Choi, M. Chung, W. da Silva, S. Eidelman, M. Finger,Y. Fukao, T. Fukuyama, S. Haciomeroglu, K. Hasegawa, K. Hayasaka, N. Hayashizaki, H. Hisamatsu, T. Iijima, H. Iinuma, H. Ikeda, M. Ikeno, K. Inami, K. Ishida, T. Itahashi, M. Iwasaki, Y. Iwashita, Y. Iwata, R. Kadono, S. Kamal, T. Kamitani, S. Kanda, F. Kapusta, K. Kawagoe, N. Kawamura, B. Kim, Y. Kim, T. Kishishita, R. Kitamura, H. Ko, T. Kohriki, Y. Kondo, T. Kume, M. J. Lee, S. Lee, W. Lee, G. M. Marshall, Y. Matsuda, T. Mibe, Y. Miyake, T. Murakami, K. Nagamine, H. Nakayama, S. Nishimura, D. Nomura,T. Ogitsu, S. Ohsawa,K. Oide,Y. Oishi, S. Okada,A. Olin, Z. Omarov, M. Otani, G. Razuvaev, A. Rehman, N. Saito, N. F. Saito, K. Sasaki, O. Sasaki, N. Sato, Y. Sato, Y. K. Semertzidis, H. Sendai, Y. Shatunov, K. Shimomura, M. Shoji, B. Shwartz, P. Strasser1, Y. Sue, T. Suehara, C. Sung, K. Suzuki, T.Takatomi, M.Tanaka, J.Tojo,Y. Tsutsumi,T. Uchida,K. Ueno, S.Wada, E.Won, H.Yamaguchi, T.Yamanaka, A.Yamamoto, T.Yamazaki, H.Yasuda,M.Yoshida, and T.Yoshioka, A new approach for measuring the muon anomalous magnetic moment and electric dipole moment, Progress of Theoretical and Experimental Physics, 10.1093/ptep/ptz030, 2019, 5, 053C02, 2019.05, This paper introduces a new approach to measure the muon magnetic moment anomaly aμ = (g − 2)/2 and the muon electric dipole moment (EDM) dμ at the J-PARC muon facility. The goal of our experiment is to measure aμ and dμ using an independent method with a factor of 10 lower muon momentum, and a factor of 20 smaller diameter storage-ring solenoid compared with previous and ongoing muon g − 2 experiments with unprecedented quality of the storage magnetic field. Additional significant differences from the present experimental method include a factor of 1000 smaller transverse emittance of the muon beam (reaccelerated thermal muon beam), its efficient vertical injection into the solenoid, and tracking each decay positron from muon decay to obtain its momentum vector. The precision goal for aμ is a statistical uncertainty of 450 parts per billion (ppb), similar to the present experimental uncertainty, and a systematic uncertainty less than 70 ppb. The goal for EDM is a sensitivity of 1.5 × 10^−21 e · cm..
4.	ATLAS Collaboration, Search for squarks and gluinos in final states with jets and missing transverse momentum using 36 fb^-1 of √s = 13 TeV pp collision data with the ATLAS detector, PHYSICAL REVIEW D, 10.1103/PhysRevD.97.112001, 97, 112001, 2018.06, A search for the supersymmetric partners of quarks and gluons (squarks and gluinos) in final states containing hadronic jets and missing transverse momentum, but no electrons or muons, is presented. The data used in this search were recorded in 2015 and 2016 by the ATLAS experiment in √s=13 TeV proton-proton collisions at the Large Hadron Collider, corresponding to an integrated luminosity of 36.1 fb^−1. The results are interpreted in the context of various models where squarks and gluinos are pair produced and the neutralino is the lightest supersymmetric particle. An exclusion limit at the 95% confidence level on the mass of the gluino is set at 2.03 TeV for a simplified model incorporating only a gluino and the lightest neutralino, assuming the lightest neutralino is massless. For a simplified model involving the strong production of mass-degenerate first- and second-generation squarks, squark masses below 1.55 TeV are excluded if the lightest neutralino is massless. These limits substantially extend the region of supersymmetric parameter space previously excluded by searches with the ATLAS detector..
5.	ATLAS Collaboration, Search for squarks and gluinos in final states with jets and missing transverse momentum at √s=13 TeV with the ATLAS detector, The European Physical Journal C, 10.1140/epjc/s10052-016-4184-8, 76, 392, 2016.06, [URL], A search for squarks and gluinos in final states containing hadronic jets, missing transverse momentum but no electrons or muons is presented. The data were recorded in 2015 by the ATLAS experiment in √s= 13 TeV proton--proton collisions at the Large Hadron Collider. No excess above the Standard Model background expectation was observed in 3.2 fb^−1 of analyzed data. Results are interpreted within simplified models that assume R-parity is conserved and the neutralino is the lightest supersymmetric particle. An exclusion limit at the 95% confidence level on the mass of the gluino is set at 1.51 TeV for a simplified model incorporating only a gluino octet and the lightest neutralino, assuming the lightest neutralino is massless. For a simplified model involving the strong production of mass-degenerate first- and second-generation squarks, squark masses below 1.03 TeV are excluded for a massless lightest neutralino. These limits substantially extend the region of supersymmetric parameter space excluded by previous measurements with the ATLAS detector..

主要総説, 論評, 解説, 書評, 報告書等

全てを見る→

1.	山中隆志, ミュオンg-2/EDMの測定, 日本中間子科学会誌「めそん」2020年秋号 No.52, 2020.08, [URL].

主要学会発表等

全てを見る→

1.	山中　隆志, ミュオンg-2アノマリーとg-2実験の展望, 日本物理学会　2020年秋季大会, 2020.09.
2.	Takashi Yamanaka for the J-PARC E34 Collaboration, Muon g-2/EDM Experiment at J-PARC, 2019 KPS Spring Meeting, 2019.04, A new precise muon g-2/EDM measurement is planned at J-PARC. The recent experiment at BNL measured muon g-2 at 0.54 ppm but there is a discrepancy from the Standard Model expectation by more than three standard deviations. The experiment at J-PARC aims to measure muon g-2 with a different method from BNL or another experiment ongoing at FNAL and also to improve a sensitivity to muon EDM. We use a novel technique of muon beam thermalization, accelerate muons to 300 MeV/c, inject and store them in high precision MRI-type magnet with the storage orbit diameter of 66 cm and 3 T field and focuses with weak magnetic field. Positron tracks from muon decays are reconstructed by the silicon strip detector. By using different approaches from BNL and FNAL, J-PARC experiment will provide a independent measurement. The overall design and its preparation status will be presented..
3.	T. Yamanaka, T. Aoyagi, H. Ikeda, M. Ikeno, T. Ito, K. Ueno, T. Uchida, K. Kawagoe, T. Kishishita, T. Kume, T. Kohriki, N. Saito, O. Sasaki, T. Sata, N. Sato, Y. Sato, M. Shoji, S. Shirabe, T. Suehara, Y. Sue, T. Suda, H. Sendai, T. Takatomi, M. Tanaka, K. Tsukada, Y. Tsutsumi, J. Tojo, K. Namba, S. Nishimura, Y. Honda, M. Matama, T. Mibe, T. Murakami, H. Yasuda, T. Yoshioka, and J-PARC muon g-2/EDM Collaboration, Positron Tracking Detector for J-PARC Muon g-2/EDM Experiment, 15th Vienna Conference on Instrumentation, 2019.02.
4.	Takashi Yamanaka, Muon g-2/EDM measurement at J-PARC, 10th International Workshop on Fundamental Phisics Using Atoms, 2018.01, [URL], A new precise muon g-2/EDM measurement is planned at J-PARC. The recent experiment at BNL measured muon g-2 at 0.5 ppm but there is a discrepancy from the standard model expectation by three standard deviation. The experiment at J-PARC uses a novel technique of ultra-cold muon beam, accelerates muons to 300 MeV/c, injects and stores them in ultra-high precision MRI-type magnet with 66 cm diameter and 3 T field and focuses with weak magnetic field. Positron tracks from muon decays are reconstructed by the silicon strip detector. By using different approaches from BNL and another experiment ongoing at FNL, J-PARC experiment will provide a independent measurement. The overall design and its preparation status will be reported..

学会活動

所属学会名

応用物理学会

高エネルギー研究者会議

日本物理学会

学会大会・会議・シンポジウム等における役割

2023.03.22～2023.03.25, 日本物理学会　2023年春季大会, セッションの座長.

2021.09.14～2021.09.17, 日本物理学会 2021年秋季大会, セッションの座長.

2020.09.14～2020.09.17, 日本物理学会 2020年秋季大会, セッションの座長.

2021.03.12～2021.03.15, 日本物理学会　第76回年次大会, セッションの座長.

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)

2022年度～2024年度, 挑戦的研究（萌芽）, 代表, ペロブスカイト半導体を用いた粒子検出技術の創生.

2022年度～2024年度, 基盤研究(B), 代表, ラビ振動分光によるミュオン質量CPT対称性の精密検証.

九大関連コンテンツ

pure2017年10月2日から、「九州大学研究者情報」を補完するデータベースとして、Elsevier社の「Pure」による研究業績の公開を開始しました。

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