Organization
Institute of Integrated Research Laboratory for Zero-Carbon Energy Associate Professor
Title
Associate Professor
External link
TSUTSUI HIROAKI
Degree
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Doctor of Engineering ( The University of Tokyo )
Research Areas
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Energy Engineering / Fundamental plasma
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Energy Engineering / Nuclear fusion
Education
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The University of Tokyo
- 1989
Country： Japan
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The University of Tokyo Graduate School, Division of Engineering
- 1989
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The University of Tokyo The Faculty of Engineering Department of Applied Physics
- 1984
Country： Japan
Research History
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-:
1990
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-:東京工業大学 原子炉工学研究所 助手
1990
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:東京工業大学 工学部・電気電子工学科 助手
1989 - 1990
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:
1989 - 1990
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:日本原子力研究所 核融合研究部・理論解析研究室 核融合特別研究生
1989
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:
1989
Professional Memberships
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日本応用数理学会
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日本原子力学会
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プラズマ・核融合学会
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日本物理学会
Committee Memberships
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日本原子力学会 核融合工学部会 運営委員
2009 - 2010
Papers
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Plasma physics and control studies planned in JT-60SA for ITER and DEMO operations and risk mitigation Invited Reviewed
M Yoshida, G Giruzzi, N Aiba, J F Artaud, J Ayllon-Guerola, L Balbinot, O Beeke, E Belonohy, P Bettini, W Bin, A Bierwage, T Bolzonella, M Bonotto, C Boulbe, J Buermans, M Chernyshova, S Coda, R Coelho, S Davis, C Day, G De Tommasi, M Dibon, A Ejiri, G Falchetto, A Fassina, B Faugeras, L Figini, M Fukumoto, S Futatani, K Galazka, J Garcia, M Garcia-Muñoz, L Garzotti, L Giacomelli, L Giudicotti, S Hall, N Hayashi, C Hoa, M Honda, K Hoshino, M Iafrati, A Iantchenko, S Ide, S Iio, R Imazawa, S Inoue, A Isayama, E Joffrin, K Kamiya, Y Ko, M Kobayashi, T Kobayashi, G Kocsis, A Kovacsik, T Kurki-Suonio, B Lacroix, P Lang, Ph Lauber, A Louzguiti, E de la Luna, G Marchiori, M Mattei, A Matsuyama, S Mazzi, A Mele, F Michel, Y Miyata, J Morales, P Moreau, A Moro, T Nakano, M Nakata, E Narita, R Neu, S Nicollet, M Nocente, S Nowak, F P Orsitto, V Ostuni, Y Ohtani, N Oyama, R Pasqualotto, B Pégourié, E Perelli, L Pigatto, C Piccinni, A Pironti, P Platania, B Ploeckl, D Ricci, P Roussel, G Rubino, R Sano, K Särkimäki, K Shinohara, S Soare, C Sozzi, S Sumida, T Suzuki, Y Suzuki, T Szabolics, T Szepesi, Y Takase, M Takech, N Tamura, K Tanaka, H Tanaka, M Tardocchi, A Terakado, H Tojo, T Tokuzawa, A Torre, N Tsujii, H Tsutsui, Y Ueda, H Urano, M Valisa, M Vallar, J Vega, F Villone, T Wakatsuki, T Wauters, M Wischmeier, S Yamoto, L Zani
Plasma Physics and Controlled Fusion 64 ( 5 ) 054004 - 054004 2022.5
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Stabilization of vertical plasma position in the PHiX tokamak with saddle coils
S. Naito, M. Murayama, S. Hatakeyama, D. Kuwahara, Y. Suzuki, H. Tsutsui, S. Tsuji-Iio
Nuclear Fusion 2021.11
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Estimating ripple transport of moderately-confined fast tritons by D-D fusion in JT-60SA Tokamak Reviewed
Anggi B. Kurniawan, Hiroaki Tsutsui, Keiji Tani, Kouji Shinohara
Plasma and Fusion Research 15 ( SpecialIssue1 ) 2020
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The effects of resonant magnetic perturbations and charge-exchange reactions on fast ion confinement and neutron emission in the Mega Amp Spherical Tokamak Reviewed
K. G. McClements, K. Tani, R. J. Akers, Y. Q. Liu, K. Shinohara, H. Tsutsui, S. Tsuji-Iio
Plasma Physics and Controlled Fusion 60 ( 9 ) 2018.7
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Structural Limitations of Energy Storage Systems Based on the Virial Theorem Reviewed
Shinichi Nomura, Hiroaki Tsutsui
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 27 ( 4 ) 5700106 2017.6
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Tsuyoshi Yagai, Haruka Akai, R. Dong Ryun, Hiroharu Kamada, Shinichi Nomura, Hiroaki Tsutsui, Taketsune Nakamura, Hirotaka Chikaraishi, Nagato Yanagi, Shinsaku Imagawa
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 27 ( 4 ) 2017.6
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Application of a non-steady-state orbit-following Monte-Carlo code to neutron modeling in the MAST spherical tokamak Reviewed
K. Tani, K. Shinohara, T. Oikawa, H. Tsutsui, K. G. McClements, R. J. Akers, Y. Q. Liu, M. Suzuki, S. Ide, Y. Kusama, S. Tsuji-Iio
PLASMA PHYSICS AND CONTROLLED FUSION 58 ( 10 ) 2016.10
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Strain Distribution of Complex-Bending YBCO Tape in Force-Balanced Coil Applied to SMES Reviewed
T. Yagai, Y. Kimura, H. Kamada, S. Nomura, T. Nakamura, H. Tsutsui, H. Yoshida, M. Kudo, H. Chikaraishi, N. Yanagi, S. Imagawa
IEEE Transactions on Applied Superconductivity 26 ( 4 ) 2016.6
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Yusuke Kimura, Hiroharu Kamada, Shinichi Nomura, Tsuyoshi Yagai, Taketsune Nakamura, Hiroaki Tsutsui, Hirotaka Chikaraishi, Nagato Yanagi, Shinsaku Imagawa
IEEE Transactions on Applied Superconductivity 26 ( 4 ) 2016.6
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Edgewise Bending Strain in Helical Coils with Geodesic Windings Based on Virial Theorem Reviewed
Hiroaki Tsutsui, Shunji Tsuji-Iio, Shinichi Nomura, Tsuyoshi Yagai, Taketsune Nakamura, Hirotaka Chikaraishi, Nagato Yanagi, Shinsaku Imagawa
IEEE Transactions on Applied Superconductivity 26 ( 4 ) 2016.6
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Flywheel induction motor-generator for magnet power supply in small fusion device Reviewed
S. Hatakeyma, F. Yoshino, H. Tsutsui, S. Tsuji-Iio
REVIEW OF SCIENTIFIC INSTRUMENTS 87 ( 4 ) 2016.4
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Commissioning of a non-circular VDE-free tokamak with saddle coils
T. Kobayashi, S. Hatakeyama, M. Watanabe, H. Tsutsui, S. Tsuji-Iio
42nd European Physical Society Conference on Plasma Physics, EPS 2015 2015
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22aAP-3 Density gradient dependence of electron heat transport
Asahi Y., Ishizawa A., Watanabe T. -H., Sugama H., Tsutsui S., Tsuji-Iio S.
Meeting Abstracts of the Physical Society of Japan 70 840 - 840 2015
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Nonlinear Entropy Transfer in ETG-TEM Turbulence via TEM Driven Zonal Flows Reviewed
Yuuichi ASAHI, Akihiro ISHIZAWA, Tomohiko WATANABE, Hideo SUGAMA, Hiroaki TSUTSUI, Shunji TSUJI-IIO
Plasma and Fusion Research 10 ( 0 ) 1403047 - 1403047 2015
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23pCM-6 Development of A Small VDE-Free Non-circular Tokamak
Hatakeyama Shoichi, Watanabe Masaki, Kobayashi Takayuki, Murayama Masamichi, Tsutsui Hiroaki, Tsuji-Iio Shunji
Meeting Abstracts of the Physical Society of Japan 70 904 - 904 2015
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Regulation of electron temperature gradient turbulence by zonal flows driven by trapped electron modes Reviewed
Y. Asahi, A. Ishizawa, T. -H. Watanabe, H. Tsutsui, S. Tsuji-Iio
PHYSICS OF PLASMAS 21 ( 5 ) 052306 2014.5
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Numerical techniques for parallel dynamics in electromagnetic gyrokinetic Vlasov simulations Reviewed
S. Maeyama, A. Ishizawa, T.-H. Watanabe, N. Nakajima, S. Tsuji-Iio, H. Tsutsui
Computer Physics Communications 184 ( 11 ) 2462-2473 2013.6
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Feasibility Study on Large Scale SMES for Daily Load Leveling Using Force-Balanced Helical Coils Reviewed
Shinichi Nomura, Hirotaka Chikaraichi, Hiroaki Tsutsui, Ryuichi Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 23 ( 3 ) 2013.6
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Analysis of Stress Distribution in Helical Coils With Geodesic Windings Based on Virial Theorem Reviewed
Hiroaki Tsutsui, Takayuki Habuchi, Shunji Tsuji-Iio, Ryuichi Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 22 ( 3 ) 2012.6
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A hybrid method of semi-Lagrangian and additive semi-implicit Runge-Kutta schemes for gyrokinetic Vlasov simulations Reviewed
S. Maeyama, A. Ishizawa, T.-H. Watanabe, N. Nakajima, S. Tsuji-Iio, H. Tsutsui
Computer Physics Communications 183 ( 9 ) 1986-1992 2012.5
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Effects of ELM mitigation coils on energetic particle confinement in ITER steady-state operation Reviewed
K. Tani, K. Shinohara, T. Oikawa, H. Tsutsui, S. Miyamoto, Y. Kusama, T. Sugie
Nuclear Fusion 52 ( 1 ) 2012.1
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Optimization of the Stress Distribution of Helical Coils With a Cable-in-Conduit Configuration Reviewed
Takayuki Habuchi, Hiroaki Tsutsui, Shunji Tsuji-Iio, Ryuichi Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 21 ( 5 ) 3494 - 3500 2011.10
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Acoustic Emission in a Superconducting Force-Balanced Helical Coil Reviewed
Shinichi Nomura, Kenji Tsuboi, Kazuyuki Ito, Hiroaki Tsutsui, Shunji Tsuji-Iio, Akira Ninomiya, Ryuichi Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 21 ( 3 ) 1636 - 1639 2011.6
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A numerical method for parallel particle motions in gyrokinetic Vlasov simulations Reviewed
S. Maeyama, A. Ishizawa, T.-H. Watanabe, N. Nakajima, S. Tsuji-Iio, H. Tsutsui
Plasma and Fusion Research 6 2401028 2011.2
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Force Balance and Stability of Toroidal Helical Coil with Circular Cross Section
HABUCHI Takayuki, TSUTSUI Hiroaki, TSUJI-IIO Shunji, SHIMADA Ryuichi
Plasma and Fusion Research 6 2405150 - 2405150 2011
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An efficient numerical method for gyrokinetic 8 f Vlasov simulations in helical plasmas
S. Maeyama, A. Ishizawa, T. H. Watanabe, N. Nakajima, S. Tsuji-Iio, H. Tsutsui
38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts 35 1828 - 1831 2011
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Helical coils for the positional stability and elongation of tokamak plasma
S. Hatakeyama, M. Soya, H. Tsutsui, S. Tsuji-Iio, R. Shimada, T. Akiyama, K. Y. Watanabe
38th EPS Conference on Plasma Physics 2011, EPS 2011 - Europhysics Conference Abstracts 35 1112 - 1115 2011
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Effects of time-varying E x B flow on slab ion-temperature-gradient turbulence Reviewed
S. Maeyama, A. Ishizawa, T. -H. Watanabe, M. M. Skoric, N. Nakajima, S. Tsuji-lio, H. Tsutsui
PHYSICS OF PLASMAS 17 ( 6 ) 062305 2010.6
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3-Dimensional Stress Analysis of Virial-Limit Coils Reviewed
T. Habuchi, H. Tsutsui, S. Tsuji-Iio, R. Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 20 ( 3 ) 1924 - 1927 2010.6
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超電導磁気エネルギー貯蔵用電磁力平衡コイルの実証モデル開発 Reviewed
野村新一, 粕谷幸司, 田中規博, 坪井謙児, 筒井広明, 嶋田隆一, 二ノ宮晃, 石郷岡猛
電気学会論文誌B 電力・エネルギー部門誌 129 ( 11 ) 1311 - 1318 2009.11
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Ripple Loss of Alpha Particles in a Low-Aspect Ratio Tokamak Reactor Reviewed
TANI Keiji, NISHIO Satoshi, TOBITA Kenji, TSUTSUI Hiroaki, MIMATA Hideyuki, TSUJI IIO Shunji, AOKI Takayuki
IEEJ Transactions on Fundamentals and Materials 129 ( 9 ) 569 - 574 2009.9
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Design considerations for SMES systems applied to HVDC links Reviewed
Shinichi Nomura, Norihiro Tanaka, Kenji Tsuboi, Hiroaki Tsutsui, Shunji Tsuji-Iio, Ryuichi Shimada
EPE: 2009 13TH EUROPEAN CONFERENCE ON POWER ELECTRONICS AND APPLICATIONS, VOLS 1-9 2905 - 2914 2009
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Ripple loss of alpha particles in a low-aspect ratio tokamak reactor Reviewed
Keiji Tani, Satoshi Nishio, Kenji Tobita, Hiroaki Tsutsui, Hideyuki Mimata, Shunji Tsuji-Iio, Takayuki Aoki
IEEJ Transactions on Fundamentals and Materials 129 ( 9 ) 2009
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Numerical Study of the Ripple Resonance Diffusion of Alpha Particles in Tokamaks
MIMATA Hideyuki, TANI Keiji, TSUTSUI Hiroaki, TOBITA Kenji, TSUJI-IIO Shunji, SHIMADA Ryuichi
Plasma and Fusion Research 4 8 - 8 2009
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Experimental results of a 7-T force-balanced helical coil for large-scale SMES Reviewed
Shinichi Nomura, Koji Kasuya, Norihiro Tanaka, Kenji Tsuboi, Hiroaki Tsutsui, Shunji Tsuji-Iio, Ryuichi Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 18 ( 2 ) 701 - 704 2008.6
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Finite Larmor radius effects on ripple diffusion in tokamaks Reviewed
H. Mimata, K. Tani, K. Tobita, H. Tsutsui, S. Tsuji-Iio, R. Shimada
PROGRESS IN NUCLEAR ENERGY 50 ( 2-6 ) 638 - 642 2008
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Interconnected Power Systems with Superconducting Magnetic Energy Storage Reviewed
Shinichi Nomura, Takushi Hagita, Hiroaki Tsutsui, Yoshihisa Sato, Ryuichi Shimada
Electrical Engineering in Japan 164 ( 2 ) 37 - 43 2008
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Performance test of dual modulator polarimeters in two different configurations for magneto-optic measurement of fusion devices Reviewed
Kenji Higuchi, Tsuyoshi Akiyama, Yoshifumi Azuma, Shunj I. Tsuji-Iio, Hiroaki Tsutsui, Ryuichi Shimada
FUSION ENGINEERING AND DESIGN 82 ( 5-14 ) 1263 - 1270 2007.10
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Numerical evaluation of ripple-induced diffusion of suprathermal ion in tokamaks Reviewed
H. Mimata, K. Tani, K. Tobita, H. Tsutsui, S. Tsuji-Iio, R. Shimada
34th EPS Conference on Plasma Physics 2007, EPS 2007 - Europhysics Conference Abstracts 31 ( 3 ) 1785 - 1788 2007
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Development of a One Tenth Sized Model Coil for 100-MJ Class SMES Using Force-Balanced Coil Concept
S. Nomura, K. Kasuya, N. Tanaka, H. Tsutsui, S. Tsuji-Iio, R. Shimada
IEEE Transactions on Applied Superconductivity 17 ( 2 ) 1998 - 2001 2007
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Power Factor Correction Using Magnetic Energy Recovery Current Switches
Taku Takaku, Takanori Isobe, Jun Narushima, Hiroaki Tsutsui, Ryuichi Shimada
Electrical Engineering in Japan 160 ( 3 ) 56 - 62 2007
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超電導磁気エネルギー貯蔵付き系統間連系風力発電設備
野村新一, 粕谷幸司, 田中規博, 筒井広明, 飯尾俊二, 嶋田隆一
設計工学 42 ( 7 ) 382 - 389 2007
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Compatibility of reduced activation ferritic steel wall with high performance plasma on JFT-2M
K. Tsuzuki, K. Kamiya, K. Shinohara, M. Bakhtiari, H. Ogawa, G. Kurita, M. Takechi, S. Kasai, M. Sato, M. Sato, H. Kawashima, K. Uehara, K. Hoshino, Y. Kusama, M. Yamamoto, T. Shibata, K. Kikuchi, H. Amemiya, Y. Sadamoto, Y. Nagashima, A. Ejiri, T. Hino, Y. Hirohata, H. Tsutsui, R. Shimada, T. Ido, Y. Hamada
NUCLEAR FUSION 46 ( 11 ) 966 - 971 2006.11
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Flexible power interconnection with SMES
Shinichi Nomura, Hiroaki Tsutsui, Shunji Tsuji-Iio, Ryuichi Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 16 ( 2 ) 616 - 619 2006.6
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Voltage rating reduction of magnet power supplies using a magnetic energy recovery switch
Takanori Isobe, Taku Takaku, Takeshi Munakata, Hiroaki Tsutsui, Shunji Tsuji-Iio, Ryuichi Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 16 ( 2 ) 1646 - 1649 2006.6
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超電導磁気エネルギー貯蔵付き系統間連系設備 Reviewed
野村新一, 萩田拓史, 筒井広明, 佐藤義久, 嶋田隆一
電気学会論文誌B 電力・エネルギー部門誌 126 ( 2 ) 251 - 256 2006.2
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Fusion power supplies using magnetic energy recovery switch Reviewed
Takanori Isobe, Taku Takaku, Takeshi Munakata, Hiroaki Tsutsui, Shunji Tsuji-Iio, Tatsuya Matsukawa, Ryuichi Shimada
21ST IEEE/NPSS SYMPOSIUM ON FUSION ENGINEERING - SOFE 05 610 - 613 2006
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Finite Larmor radius effects on ripple-induced α-particle diffusion in spherical tokamaks Reviewed
H. Mimata, K. Tani, K. Tobita, H. Tsutsui, S. Tsuji-Iio, R. Shimada
33rd EPS Conference on Plasma Physics 2006, EPS 2006 3 1660 - 1663 2006
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Advanced configuration of superconducting magnetic energy storage
S Nomura, N Watanabe, C Suzuki, H Ajikawa, M Uyama, S Kajita, Y Ohata, H Tsutsui, S Tsuji-Iio, R Shimada
ENERGY 30 ( 11-12 ) 2115 - 2127 2005.8
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Construction of a 7-T force-balanced helical coil
S Nomura, Y Ohata, T Hagita, H Tsutsui, S Tsuji-Iio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 15 ( 2 ) 1911 - 1914 2005.6
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Wind farms linked by SMES systems
S Nomura, Y Ohata, T Hagita, H Tsutsui, S Tsuji-Iio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 15 ( 2 ) 1951 - 1954 2005.6
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Simulation modeling of fully non-inductive buildup scenario in high bootstrap current tokamaks without center solenoids Reviewed
Y. Nakamura, H. Tsutsui, K. Tobita, N. Takei, Y. Takase, T. Ozeki, S. C. Jardin
32nd EPS Conference on Plasma Physics 2005, EPS 2005, Held with the 8th International Workshop on Fast Ignition of Fusion Targets - Europhysics Conference Abstracts 2 998 - 1001 2005
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Confinement of Alpha Particles in a Low-Aspect-Ratio Tokamak Reactor
Keiji Tani, Kenji Tobita, Satoshi Nishio, Shunji Tsuji-Iio, Hiroaki Tsutsui, Takayuki Aoki
IEEJ Transactions on Fundamentals and Materials 125 ( 11 ) 938 - 942 2005
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Numerical simulation on current spike behaviour of JT-60U disruptive plasmas
N Takei, Y Nakamura, H Tsutsui, R Yoshino, Y Kawano, T Ozeki, K Tobita, S Tsuji-Iio, R Shimada, SC Jardin
PLASMA PHYSICS AND CONTROLLED FUSION 46 ( 12 ) 1815 - 1830 2004.12
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Helically wound coils for high field magnets
S Nomura, Y Ohata, T Hagita, H Tsutsui, S Tsuji-Iio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 14 ( 2 ) 709 - 712 2004.6
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Design and fabrication of a 7-T force-balanced helical coil
S Nomura, Y Ohata, T Hagita, H Tsutsui, S Tsuji-Iio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 14 ( 2 ) 739 - 742 2004.6
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Tilted toroidal coils for superconducting magnetic energy storage systems
M Fabbri, D Ajiki, F Negrini, R Shimada, H Tsutsui, F Venturi
IEEE TRANSACTIONS ON MAGNETICS 39 ( 6 ) 3546 - 3550 2003.11
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Design of compact high field tokamak based on virial theorem
H Tsutsui, T Ito, K Nakayama, S Nomura, S Tsuji-Iio, R Shimada
FUSION ENGINEERING AND DESIGN 66-68 1183 - 1187 2003.9
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Demonstration of the stress-minimized force-balanced coil concept for SMES
S Nomura, H Tsutsui, N Watanabe, C Suzuki, S Kajita, Y Ohata, T Takaku, E Koizumi, S Tsuji-Lio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 13 ( 2 ) 1852 - 1855 2003.6
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Distribution of stress in force-balanced coils on virial theorem
H Tsutsui, S Nomura, N Watanabe, C Suzuki, S Kajita, Y Ohata, S Tsuji-Iio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 13 ( 2 ) 1840 - 1843 2003.6
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Axisymmetric MHD Simulation of Current Hole Formation by ITB-driven Bootstrap Current Reviewed
Nakamura Y., Jardin S. C., Tsutsui H., Takei N., Sakamoto Y., Fujita T., Sugihara M., Ozeki T., Tobita K., Iio S.
Meeting Abstracts of the Physical Society of Japan 58 ( 0 ) 175 - 175 2003
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Experimental study on a high-temperature superconducting helical coil
S Nomura, C Suzuki, N Watanabe, M Uyama, E Koizumi, H Tsutsui, S Tsuji-Iio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 12 ( 1 ) 788 - 791 2002.3
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Application of Force-Balanced Coil to a Tokamak Device
J. Kondoh, T. Fujita, H. Tsutsui, Y. Sato, S. Tsuji-iio, R. Shimada
Electrical Engineering in Japan 130 ( 3 ) 39 - 48 2000
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Force-balanced coil for large scale SMES
S Nomura, T Osaki, J Kondoh, H Tsutsui, S Tsuji-Iio, Y Sato, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 9 ( 2 ) 354 - 357 1999.6
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Equilibrium Analysis of Tokamak Plasma by Multi-Layers Method
Hiroaki TSUTSUI, Ryuichi SHIMADA
Journal of Plasma and Fusion Research 72 ( 11 ) 1252 - 1258 1996
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STABILITY OF FORCE-FREE SPHEROMAK PLASMA IN SPHEROIDAL FLUX CONSERVER
S KANEKO, H TSUTSUI
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 57 ( 1 ) 108 - 116 1988.1
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MAGNETOHYDRODYNAMIC STABILITY OF SPHEROMAK PLASMA IN TOROIDAL FLUX CONSERVER WITH RECTANGULAR CROSS SECTION-III STABILITY FOR SYMMETRIC MODES
S KANEKO, YP WANG, H TSUTSUI
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 56 ( 11 ) 4188 - 4189 1987.11
Books
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小特集 球状トカマクの実用炉への展望 低アスペクト比トカマク炉のアルファ粒子閉じ込め
プラズマ核融合学会誌 2004
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Confinement of Alpha Particles in a Low Aspect Ratio Tokamak Reactor
Journal of Plasma and Fusion Research 2004
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JFT-2Mにおけるフェライト鋼内壁全面設置の設計・製作
プラズマ・核融合学会 第19回年会予稿集 2002
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ビリアル限界コイルを用いた小型トカマク装置の渦電流解析
プラズマ・核融合学会 第19回年会予稿集 2002
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ビリアル限界コイルを用いた小型トカマク装置の初期運転
プラズマ・核融合学会 第19回年会予稿集 2002
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エネルギー貯蔵用応力最小化電磁力平衡コイルの実証実験 －実証実験結果－
第67回2002年度秋季 低温工学・超電導学会 講演概要集 2002
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エネルギー貯蔵用応力最小化電磁力平衡コイルの実証実験－実験装置概要－
第67回2002年度秋季 低温工学・超電導学会 講演概要集 2002
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Stress Analysis of the Force-Balanced Coil by Finite Element Method
2002
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Demonstration of the Stress-Minimized Force-Balanced Coil Concept for Energy Storage -Experimental results-
2002
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Demonstration of the Stress-Minimized Force-Balanced Coil Concept for Energy Storage - Outline of the Experimental Device -
2002
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Optimal Winding of Superconducting Magnetic Energy Storage Coils on the Virial Theorem
67th Meeting on Cryogenics and Superconductivity 2002
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Design and Installation of Ferritic Steel Inside Wall on JFT-2M
2002
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Eddy current analysis of a Small Tokamak Device with the use of Virial Limited Coil
2002
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Initial operation of a Small Tokamak Device with the use of Virial Limit Coil
2002
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Advanced Material Tokamak Experiment using Low Activated Ferritic Steel in JFT-2M
2002
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有限要素法による電磁力平衡コイルの応力解析
第67回2002年度秋季 低温工学・超電導学会 講演概要集 2002
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Virial定理による超電導磁気エネルギー貯蔵用コイルの最適化
第67回2002年度秋季 低温工学・超電導学会 講演概要集 2002
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JFT-2Mにおける低放射化フェライト鋼の先進材料プラズマ試験
第4回核融合エネルギー連合講演会予稿集 2002
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Virial限界コイルを用いたトカマク装置の電流立ち上げ過程
第4回核融合エネルギー連合講演会予稿集 2002
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ビリアル限界コイルを用いた小型トカマク装置の製作
第4回核融合エネルギー連合講演会予稿集 2002
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BREAKDOWN ANALYSIS OF TOKAMAK BY COLLISIONAL IONIZATION MODEL
Proc. of International Symposium PLASMA-2001 on Research and Applications of Plasmas, Warsaw, Poland, Sep. 19-21, 2001 2001
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Plasma Production in a Tokamak with Force-Balanced Coils
Proc. 17th IAEA Fusion Energy Conf., Yokohama, 1998 2001
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BREAKDOWN ANALYSIS OF TOKAMAK BY COLLISIONAL IONIZATION MODEL
Proc. of International Symposium PLASMA-2001 on Research and Applications of Plasmas, Warsaw, Poland, Sep. 19-21, 2001 2001
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光弾性変調器を用いた磁場計測の予備実験
プラズマ・核融合学会第18回年会予稿集 2001
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Virial定理によるコイル応力分布の最適化
プラズマ・核融合学会第18回年会予稿集 2001
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Plasma Production in a Tokamak with Force-Balanced Coils
Proc. 17th IAEA Fusion Energy Conf., Yokohama, 1998 2001
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ビリアル限界コイルを用いた小型トカマク装置の設計と製作
プラズマ・核融合学会第18回年会予稿集 2001
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電磁力平衡コイルを用いた小型トカマク装置「等々力1号」の応力分布
プラズマ・核融合学会第17回年会予稿集 2000
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Advanced Design of Superconducting Magnets for Energy Storage (from 1-MWh class to 10-GWh class)
Proc. of International Power Electronics Conference (IPEC-Tokyo 2000) 2000
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Virial定理の磁気閉じ込め装置への適用
第3回核融合エネルギー連合講演会予稿集 2000
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シミュレーションによるプラズマ平衡の動特性解析（講座：「核融合装置におけるプラズマ平衡制御」第5章）
プラズマ核融合学会誌 2000
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Advanced Design of Superconducting Magnets for Energy Storage (from 1-MWh class to 10-GWh class)
Proc. of International Power Electronics Conference (IPEC-Tokyo 2000) 2000
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電磁力平衡コイルを用いた小型トカマク装置「等々力1号」の応力分布
第17回プラズマ核融合学会予稿集 2000
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Study of Plasma Current Start-up of the Middle-sized Tokamak with Force-Balanced Coils
Proc. of ISFNT '99 1999
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FBCトカマク等々力2号の概念設計
プラズマ・核融合学会第16回年回予稿集 1999
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ファラデー効果を利用した核融合炉用定常磁場センサ
プラズマ・核融合学会第16回年回予稿集 1999
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Study of Plasma Current Start-up of the Middle-sized Tokamak with Force-Balanced Coils
Proc. of ISFNT '99 1999
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アスペクト比の大きいSMES用電磁力平衡コイルの検討
電気学会全国大会 1998
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衝突電離モデルによるトカマクの放電開始現象の解析
第2回核融合エネルギー連合講演会講演予稿集 1998
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大容量SMES用電磁力平衡コイルの導体応力低減化
電気学会 超電導応用電力機器、回転機合同研究会 ASC-98-28 1998
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2D-Simulations of Breakdown in Tokamak by Collisional Ionization Model
Proc. of 1998 ICPP and 25th EPS Conf. on Control. Fusion and Plasma Phys. 1998
-
2D-Simulations of Breakdown in Tokamak by Collisional Ionization Model
Proc. of 1998 ICPP and 25th EPS Conf. on Control. Fusion and Plasma Phys. 1998
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多層磁気面法による導体シェル内プラズマの準平衡解析
第15回プラズマ核融合学会予稿集 1998
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High-Field Tokamak Reactor with Force-Balanced Coils as a Volumetric Neutron Source
Proc. 16th IAEA Fusion Energy Conf., Montreal, 1996 1997
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モンテカルロ法によるトカマクの放電開始現象の解析（２）
プラズマ・核融合学会第14回年会予稿集 1997
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Dynamic Analysis of Tokamak Plasma Equilibrium with In-vessel Components
Fourth International Symposium on Fusion Nuclear Technology 1997
-
Dynamic Analysis of Tokamak Plasma Equilibrium with In-vessel Components
Fourth International Symposium on Fusion Nuclear Technology 1997
-
High-Field Tokamak Reactor with Force-Balanced Coils as a Volumetric Neutron Source
Proc. 16th IAEA Fusion Energy Conf., Montreal, 1996 1997
MISC
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Measurement of plasma response to resonant magnetic perturbation in small tokamak HYBTOK-II
大瀧亮祐, 岡本征晃, 渡邊清政, 大野哲靖, 筒井広明
プラズマ・核融合学会年会(Web) 40th 2023
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Stabilization of vertical plasma position with non-axisymmetric magnetic field generated by saddle coils
内藤晋, 桑原大介, 鈴木康浩, 筒井広明, 飯尾俊二
日本物理学会講演概要集(CD-ROM) 76 ( 1 ) 2021
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Effect of non-axisymmetric magnetic field on equilibrium and positional stability in the small tokamak PHiX
内藤晋, 桑原大介, 鈴木康浩, 筒井広明, 飯尾俊二
プラズマ・核融合学会年会(Web) 37th 2020
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The design of elongated tokamak with vertical stability
畠山昭一, 三浦弘雅, 南良貴, 筒井広明, 飯尾俊二, 嶋田隆一, 柴田欣秀, 大野哲靖, 秋山毅志, 鈴木康浩, 渡邊清政
電気学会プラズマ研究会資料 PST-12 ( 68-84 ) 5 - 9 2012.8
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25pYE-5 Analysis of glow discharge in toroidal magnetic field
ASAHI Yuuichi, Tsutsui Hiroaki, Tsuji-Iio Shunji, Shimada Ryuichi
Meeting abstracts of the Physical Society of Japan 67 ( 1 ) 269 - 269 2012.3
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畠山昭一, 征矢正治, 柴田浩平, 宮浦崇, 筒井広明, 飯尾俊二, 嶋田隆一, 金沢由樹, 柴田欣秀, 河上翔, 大野哲靖, 秋山毅志, 鈴木康浩, 渡邊清政
日本物理学会講演概要集 67 ( 1 ) 280 2012.3
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表面電流ポテンシャルを用いた非軸対称磁場再構成手法の検討
宮浦崇, 前山伸也, 筒井広明, 飯尾俊二, 嶋田隆一, 渡邊清政, 鈴木康浩
核融合エネルギー連合講演会(CD-ROM) 9th 2012
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Feasibility study on high field magnets using stress-minimized helical coils
S. Nomura, H. Tsutsui, S. Tsuji-Iio, H. Chikaraishi, R. Shimada
FUSION ENGINEERING AND DESIGN 81 ( 20-22 ) 2535 - 2539 2006.11
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Feasibility study on high field magnets using stress-minimized helical coils
S. Nomura, H. Tsutsui, S. Tsuji-Iio, H. Chikaraishi, R. Shimada
Fusion Engineering and Design 81 ( 20-22 ) 2535 - 2539 2006.11
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Characteristics of plasma operation with the ferritic inside wall and its compatibility with high-performance plasmas in JFT-2M Reviewed
K Tsuzuki, H Kimura, Y Kusama, M Sato, H Kawashima, K Kamiya, K Shinohara, H Ogawa, K Uehara, G Kurita, S Kasai, K Hoshino, N Isei, Y Miura, M Yamamoto, K Kikuchi, T Shibata, M Bakhtiari, T Hino, Y Hirohata, Y Yamauchi, K Yamaguchi, H Tsutsui, R Shimada, H Amemiya, Y Nagashima, T Ido, Y Hamada
FUSION SCIENCE AND TECHNOLOGY 49 ( 2 ) 197 - 208 2006.2
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30pC33P Multi-point magnetic polarimeter using photoeIastic modulation
Higuchi Kenji, Akiyama Tsuyoshi, Azuma Yoshifumi, Tsuji-Iio Shunji, Tsutsui Hiroaki, Shimada Ryuichi
( 23 ) 233 - 233 2006
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01aA22P Loss processes of α particles in Hollow current
Mimata H., Tani K., Azumi M., Tobita K., Tsutsui H., Tsuji-Iio S., Shimada R.
( 23 ) 255 - 255 2006
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Conceptual design of spherical torus with TF-CS hybrid coils based on virial theorem
H. Tsutsui, S. Nomura, S. Tsuji-Iio, R. Shimada
Fusion Engineering and Design 75-79 67 - 70 2005.11
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Conceptual design of spherical torus with TF-CS hybrid coils based on virial theorem
H Tsutsui, S Nomura, S Tsuji-Iio, R Shimada
FUSION ENGINEERING AND DESIGN 75-79 67 - 70 2005.11
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Power Factor Correction Using Magnetic Energy Recovery Current Switches
Taku Takaku, Takanori Isobe, Jun Narushima, Hiroaki Tsutsui, Ryuichi Shimada
IEEJ Transactions on Industry Applications 125 ( 4 ) 372 - 377 2005.9
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Power Factor Correction Using Magnetic Energy Recovery Current Switches
Taku Takaku, Takanori Isobe, Jun Narushima, Hiroaki Tsutsui, Ryuichi Shimada
IEEJ Transactions on Industry Applications 125 ( 4 ) 372 - 377 2005.9
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02aA14P Finite Larmor Radius Effects on Particle Orbit in Ripple Fields
Mimata Hideyuki, Tani Keiji, Tobita Kenji, Tsutsui Hiroaki, Tsuji-Iio Shunji, Shimada Ryuichi
( 22 ) 233 - 233 2005
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01pB19P 3D Analysis of TF-CS Hybrid Coils based on Virial Theorem
TSUTSUI Hiroaki, NOMURA Shinichi, TSUJI-IIO Shunji, SHIMADA Ryuichi
( 22 ) 191 - 191 2005
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A tokamak with nearly uniform coil stress based on the virial theorem
H Tsutsui, K Nakayama, T Ito, H Ajikawa, S Nomura, S Tsuji-Iio, R Shimada
NUCLEAR FUSION 44 ( 9 ) 954 - 965 2004.9
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FEM analysis of stress distribution in force-balanced coils
H Tsutsui, S Kajita, Y Ohata, S Nomura, S Tsuji-Lio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 14 ( 2 ) 750 - 753 2004.6
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Design of force-balanced coils for high field tokamak reactors
H Tsutsui, S Nomura, S Tsuji-Iio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 14 ( 2 ) 1485 - 1488 2004.6
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Design of force-balanced coils for high field tokamak reactors
H. Tsutsui, S. Nomura, S. Tsuji-Iio, R. Shimada
IEEE Transactions on Applied Superconductivity 14 ( 2 ) 1485 - 1488 2004.6
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FEM analysis of stress distribution in force-balanced coils
H. Tsutsui, S. Kajita, Y. Ohata, S. Nomura, S. Tsuji-Iio, R. Shimada
IEEE Transactions on Applied Superconductivity 14 ( 2 ) 750 - 753 2004.6
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Investigation of Virial-Limit Coil Tokamak with No-Circular Cross Section
I10p 2004
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Axisymmetric MHD Simulation of Disruption Dynamics in High β Tokamak Plasmas
J03a 2004
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Current Profile Behavior during Ramping-up Phase in High Bootstrap Current Tokamak Plasmas
NAKAMURA Yukiharu TSUTSUI, Hiroaki, TAKEI Nahoko, SHIRAI Hiroshi, SUGIHARA Masayoshi GRIBOV Yuri, OZEKI Takahisa, TOBITA Kenji TSUJI-IIO, Shunji, JARDIN S, C
J. Plasma Fusion Res. SERIES 6 196 - 198 2004
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Development of Magnetic Field Sensor Using Faraday Effect
E04a 2004
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Plasma Discharge of a Small Tokamak Device with the Use of Virial Limit Coil
A50p 2004
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低アスペクト比トカマク炉のアルファ粒子閉じ込め
谷啓二, 飛田健次, 西尾敏, 飯尾俊二, 筒井広明, 青木尊之
プラズマ・核融合学会誌 80 ( 11 ) 961 - 934 2004
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Axisymmetric MHD Simulation of ITB Crash and Following Disruption Dynamics of Tokamak Plasmas with High Bootstrap Current
N. Takei, Y. Nakamura, Y. Kawano, H, Tsutsui, T. Ozeki, K. Tobita, M.Sugihara, S. Tsuji-Iio, R. Shimada, S.C. Jardin
J. Plasma Fusion Res. SERIES 6 554 - 557 2004
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Axisymmetric MHD Simulation of ITB Crash and Following Disruption Dynamics of Tokamak Plasmas with High Bootstrap Current
N. Takei, Y. Nakamura, Y. Kawano, H, Tsutsui, T. Ozeki, K. Tobita, M.Sugihara, S. Tsuji-Iio, R. Shimada, S.C. Jardin
J. Plasma Fusion Res. SERIES 6 554 - 557 2004
-
Current Profile Behavior during Ramping-up Phase in High Bootstrap Current Tokamak Plasmas
NAKAMURA Yukiharu TSUTSUI, Hiroaki, TAKEI Nahoko, SHIRAI Hiroshi, SUGIHARA Masayoshi GRIBOV Yuri, OZEKI Takahisa, TOBITA Kenji TSUJI-IIO, Shunji, JARDIN S, C
J. Plasma Fusion Res. SERIES 6 196 - 198 2004
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Conceptual Design of Spherical Torus with TF-CS Hybrid Coils based on Virial Theorem
TSUTSUI Hiroaki, NOMURA Shinichi TSUJI-IIO Shunji, SHIMADA Ryuichi
Abstracts of 21th JSPF Annual Meeting 26aB48P 2004
-
TSCによるディスラプション解析及び、電流立ち上げ過程の検討
筒井広明, 武井奈帆子, 飯尾俊二, 嶋田隆一, 中村幸治, 河野康則 JT, グループ C.E.Kessel, S.C.Jardin
第3回核燃焼プラズマ統合コード研究会 2004
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高ベータトカマクプラズマにおけるディスラプション挙動の軸対称シミュレーション
武井奈帆子, 中村幸治, 河野康則, 筒井広明, 小関隆久, 飛田健次, 杉原正芳, 飯尾俊二, 嶋田隆一, S.C.Jardin
第5回核融合エネルギー連合講演会予稿集 J03a 2004
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Bootstrap Current Effects on Stable Non-Inductive Current Buildup in Low Aspect Ratio Tokamaks
Y. Nakamura, K. Tobita, S.C. Jardi, H. Tsutsui, N. Takei, S. Nishio T. Ozeki M. Sugihara, S. Tsuji-Iio
Proc. 31st EPS Conference on Plasma Physics, London, 28 June - 2 July, 2004 P2.140 2004
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非円形断面Virial 限界コイルを用いたトカマクの検討
筒井広明, 野村新一, 飯尾俊二, 嶋田隆一
第5回核融合エネルギー連合講演会予稿集 I10p 2004
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Plasma Experiment of Small Tokamak Device with the Use of Virial Limit Coil
Abstracts of 21th JSPF Annual Meeting 24aA13P 2004
-
Development of Magnetic Field Sensor Utilizing a He-Ne Zeeman Laser
MIYAZAKI Takeshi AKIYAMA Tsuyoshi TSUTSUI, Hiroaki TSUJI-IIO Shunji, SHIMADA Ryuichi
Abstracts of 21th JSPF Annual Meeting 25pB22P 2004
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ビリアル限界コイルを用いた小型トカマク装置におけるプラズマ放電
上原壮一郎, 榎田拓郎, 筒井広明, 飯尾俊二, 嶋田隆一
第5回核融合エネルギー連合講演会予稿集 A50p 2004
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He-Neゼーマンレーザーを光源とする磁場計測器の開発
プラズマ・核融合学会 第21回年会予稿集 25pB22P 2004
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Virial限界コイルを用いたST炉の検討
プラズマ・核融合学会 第21回年会予稿集 26aB48P 2004
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Plasma Production in a Small High Field Force-Balanced Coil Tokamak Based on Virial Theorem
H. Tsutsui, T. Ito, H. Ajikawa, T. Enokida, K. Hayakawa, S. Nomura, S. Tsuji-Iio, R. Shimada
Proceedings of 20th IEEE/NPSS Symposium on Fusion Engineering October 14-17, 2003 San Diego, CA USA 272 - 275 2004
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ビリアル限界コイルを用いた小型トカマク装置におけるプラズマ実験
上原壮一郎, 下村浩司, 筒井広明, 飯尾俊二, 嶋田隆一
プラズマ・核融合学会 第21回年会予稿集 24aA13P 2004
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Plasma Breakdown Analysis in JFT-2M without the Use of Center Solenoid
H. Tsutsui, S. Tsuji-Iio, R. Shimada, M. Sato, K. Tsuzuki, Y. Kusama, H. Kimura
Proc. 31st EPS Conference on Plasma Physics, London, 28 June - 2 July, 2004 P2.139 2004
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TSC Simulation of ITB Crash and Following Disruption Dynamics on JT-60U High-beta Reversed Shear Plasmas
N. Takei, Y. Nakamura, Y. Kawano, H, Tsutsui, T. Ozeki, K. Tobita, M. Sugihara, S. Tsuji-Iio, R. Shimada, S.C. Jardin
Proc. 31st EPS Conference on Plasma Physics, London, 28 June - 2 July, 2004 P2.141 2004
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光磁気効果を利用した磁場計測器の開発
宮崎健, 早川和弘, 秋山毅志, 筒井広明, 飯尾俊二, 嶋田隆一
第5回核融合エネルギー連合講演会予稿集 E04a 2004
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A Tokamak with Nearly Uniform Coil Stress Based on Virial Theorem
H. Tsutsui, K. Nakayama, T. Ito, H. Ajikawa, S. Nomura, S. Tsuji-Iio, R. Shimada
Proc. 19th IAEA Fusion Energy Conf., Lyon, 2002 FT/P1-13 2003
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TSC Simulation of Disruptive Current Termination on JT-60U Reversed Shear Plasmas
N. Takei, Y. Nakamura, Y. Kawano, H, Tsutsui, T. Ozeki, T. Konishi, S. Tsuji-Iio, R. Shimada, S.C. Jardin
Proc. 30th EPS Conference on Controlled Fusion and Plasma Physics, St Petersburg, Russia, July 7-11, 2003 P-2.127 2003
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TSC Modelling of Current Ramp Scenarios with ITB-Generated Bootstrap Currents in JT-60U Reversed Shear Discharges
Y. Nakamura, H. Tsutsui, N. Takei, Y, Sakamoto, T, Fujita M. Sugihara, T. Ozeki, K. Tobita, T. Konishi, S. Tsuji-Iio, R. Shimada, S.C. Jardin
Proc. 30th EPS Conference on Controlled Fusion and Plasma Physics, St Petersburg, Russia, July 7-11, 2003 P-2.128 2003
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A Tokamak with Nearly Uniform Coil Stress Based on Virial Theorem
H. Tsutsui, K. Nakayama, T. Ito, H. Ajikawa, S. Nomura, S. Tsuji-Iio, R. Shimada
Proc. 19th IAEA Fusion Energy Conf., Lyon, 2002 FT/P1-13 2003
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Current Spike Behaviors on JT-60U Disruptive Plasmas
117 2003
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TSC Simulation of Disruptive Current Termination on JT-60U Reversed Shear Plasmas
N. Takei, Y. Nakamura, Y. Kawano, H, Tsutsui, T. Ozeki, T. Konishi, S. Tsuji-Iio, R. Shimada, S.C. Jardin
Proc. 30th EPS Conference on Controlled Fusion and Plasma Physics, St Petersburg, Russia, July 7-11, 2003 P-2.127 2003
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TSC Modelling of Current Ramp Scenarios with ITB-Generated Bootstrap Currents in JT-60U Reversed Shear Discharges
Y. Nakamura, H. Tsutsui, N. Takei, Y, Sakamoto, T, Fujita M. Sugihara, T. Ozeki, K. Tobita, T. Konishi, S. Tsuji-Iio, R. Shimada, S.C. Jardin
Proc. 30th EPS Conference on Controlled Fusion and Plasma Physics, St Petersburg, Russia, July 7-11, 2003 P-2.128 2003
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26aA36P Plasma Positioning Control of a Small Tokamak Device with the Use of Virial Limit Coil
ENOKIDA Takuro, UEHARA Souichiro, MIYAZAKI Takeshi, TSUTSUI Hiroaki, TSUJI-IIO Shunji, SHIMADA Ryuichi
( 20 ) 123 - 123 2003
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JFT-2Mにおけるプラズマブレークダウン特性
筒井広明, 飯尾俊二, 嶋田隆一, 佐藤正泰, 都筑和泰, 草間義紀
プラズマ・核融合学会プ第20回年会予稿集 124 2003
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ST炉におけるアルファ粒子閉じ込めに関する諸問題
谷啓二, 飛田建次, 西尾敏, 飯尾俊二, 筒井広明, 青木尊之
電気学会 プラズマ研究会資料 PST-03 ( 39 ) 13 - 18 2003
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JT-60Uディスラプションプラズマにおける電流スパイク挙動
武井奈保子, 中村幸治, 筒井広明, 河野康則, 小関隆久, 飯尾俊二, 嶋田隆一, S.C.Jardin
プラズマ・核融合学会第20回年会予稿集 117 2003
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Plasma Position Control of a Small Tokamak Device with the Use of Virial Limit Coil
ENOKIDA Takuro, UEHARA Souichiro, MIYAZAKI Takeshi, TSUTSUI Hiroaki, TSUJI-IIO Shunji, SHIMADA Ryuichi
( 20 ) 123 - 123 2003
-
Plasma Breakdown Analysis in JFT-2M
124 2003
-
On the Confinement of Alpha Particles in a Low-Aspect-Ratio Tokamak Reactor
PST-03 ( 39 ) 13 - 18 2003
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Development of Helically Winding Machine for Force-Balanced Coil and Winding Technique
Shinichi Nomura, Naruaki Watanabe, Hiroki Ajikawa, Hiroaki Tsutsui, Shunji Tsuji-Iio, Ryuichi Shimada, Yoshihisa Sato
IEEJ Transactions on Industry Applications 122 ( 3 ) 288 - 293 2002.9
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Variations of force-balanced coils for SMES
S Nomura, R Shimada, C Suzuki, S Tsuji-Iio, H Tsutsui, N Watanabe
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 12 ( 1 ) 792 - 795 2002.3
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Mathematical approach to current sharing problem of superconducting triple strands
Hiroaki Tsutsui, Shinichi Nomura, Ryuichi Shimada, Shunji Tsuji-Iio
IEEE Transactions on Applied Superconductivity 12 ( 1 ) 1488 - 1491 2002.3
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Variations of force-balanced coils for SMES
S. Nomura, R. Shimada, C. Suzuki, S. Tsuji-Iio, H. Tsutsui, N. Watanabe
IEEE Transactions on Applied Superconductivity 12 ( 1 ) 792 - 795 2002.3
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Optimization of SMES coil by using virial theorem
Hiroaki Tsutsui, Shinichi Nomura, Ryuichi Shimada
IEEE Transactions on Applied Superconductivity 12 ( 1 ) 800 - 803 2002.3
-
Bench testing of magneto-optic polarimeters for long-pulsed fusion devices
T Akiyama, R Shimada, M Takahashi, K Terai, S Tsuji-Iio, H Tsutsui
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 12 ( 1 ) 1647 - 1650 2002.3
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Mathematical approach to current sharing problem of superconducting triple strands
H Tsutsui, S Nomura, R Shimada, S Tsuji-Iio
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 12 ( 1 ) 1488 - 1491 2002.3
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Optimization of SMES coil by using virial theorem
H Tsutsui, S Nomura, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 12 ( 1 ) 800 - 803 2002.3
-
Optimization of helical hybrid coil for high field tokamak
H Tsutsui, K Nakayama, S Nomura, R Shimada, S Tsuji-Iio
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 12 ( 1 ) 644 - 647 2002.3
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Optimization of Helical Hybrid Coil for High Field Tokamak
H. Tsutsui, K. Nakayama, S. Nomura, R. Shimada, S. Tsuji-Iio
IEEE Trans. Appl. Supercond. 12 ( 1 ) 644 - 647 2002
-
Design considerations for Force-Balanced Coil applied to SMES
S Nomura, D Ajiki, C Suzuki, N Watanabe, E Koizumi, H Tsutsui, S Tsuji-Iio, R Shimada
IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY 11 ( 1 ) 1920 - 1923 2001.3
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Fiberoptic heterodyne magnetic field sensor for long-pulsed fusion devices
S Tsuji-lio, T Akiyama, E Sato, T Nozawa, H Tsutsui, R Shimada, M Takahashi, K Terai
REVIEW OF SCIENTIFIC INSTRUMENTS 72 ( 1 ) 413 - 416 2001.1
-
30pA21P Preliminary Test on Magnetic Field Measurement with Photoelastic Modulators
Tsuji-Iio Shunji, Akiyama Tsuyoshi, Tsutsui Hiroaki, Shimada Ryuichi
( 18 ) 184 - 184 2001
-
Application of Virial Theorem to Magnetic Confinement Fusion Device
Journal of Plasma and Fusion Research 77 300 - 308 2001
-
Virial定理の磁気閉じ込め核融合装置への応用
筒井広明, 野村新一, 嶋田隆一
プラズマ・核融合学会誌 77 300 - 308 2001
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電磁力平衡コイル用ヘリカル巻線機の開発とコイル製作技術
野村新一, 渡辺成章, 味川浩樹, 筒井広明, 佐藤義久, 飯尾俊二, 嶋田隆一
電気学会産業応用部門大会講演論文集 Ⅰ ( 22 ) 299 - 304 2001
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Study of plasma current start-up of the middle-sized tokamak with force-balanced coils
T Murakami, Y Komatsu, H Tsutsui, S Tsuji-iio, R Shimada, S Murase, S Shimamoto
FUSION ENGINEERING AND DESIGN 51-52 1059 - 1064 2000.11
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Dynamic Analysis of Tokamak Plasma by Multi-Layers Method
Hiroaki TSUTSUI, Ryuichi SHIMADA
Journal of Plasma and Fusion Research 75 1252 - 1258 1999
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Dynamic Analysis of Tokamak Plasma by Multi-Layers Method
TSUTSUI Hiroaki, SHIMADA Ryuichi
Journal of Plasma and Fusion Research 75 ( 10 ) 1252 - 1258 1999
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光ファイバーをセンサーとする電流・磁場計測
飯尾俊二, 嶋田隆一, 筒井広明
平成10年度九州大学応用力学研究所共同研究成果報告書（第２号） 181 - 183 1999
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Transmutation of fission products by high-field tokamak reactor with force-balanced coils
H Tsutsui, H Yamaguchi, J Kondoh, S Tsuji-Iio, R Shimada
FUSION ENGINEERING AND DESIGN 41 431 - 436 1998.9
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Transmutation of Fission Products by High-Field Tokamak with Force-Balanced Coils
H. TSUTSUI, H, YAMAGUCHI J, KONDOH S. TSUJI-IIO R. SHIMADA
Fusion Eng. Des 41 431 - 436 1998
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電磁力平衡コイルのトカマク装置への適用
近藤潤次, 藤田崇, 筒井広明, 佐藤義久, 飯尾俊二, 嶋田隆一
電気学会論文誌Ｂ 118-B ( 2 ) 191 - 198 1998
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Application of Force-Balanced Coil for Tokamak Devices
Junji Kondoh, Takashi Fujita, Hiroaki TSUTSUI, Yoshihisa SATO, Shunji Tsuji-Iio Ryuichi Shimada
T.IEE Japan 118-B ( 2 ) 191 - 198 1998
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Application of Force-Balanced Coil for Tokamak Devices
Junji Kondoh, Takashi Fujita, Hiroaki TSUTSUI, Yoshihisa SATO, Shunji Tsuji-Iio Ryuichi Shimada
T.IEE Japan 118-B ( 2 ) 191 - 198 1998
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Tokamak with force-balanced coil
Kondoh J, Komatsu Y, Tsutsui H, Tsuji-Iio S, Shimada, R
Fusion Engineering, 1997. 17th IEEE/NPSS Symposium 1 265 - 268 1997
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Tokamak with force-balanced coil
Kondoh J, Komatsu Y, Tsutsui H, Tsuji-Iio S, Shimada, R
Fusion Engineering, 1997. 17th IEEE/NPSS Symposium 1 265 - 268 1997
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多層磁気面法によるトカマク・プラズマの平衡解析
プラズマ・核融合学会誌 72 ( 11 ) 1252 - 1258 1996
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MAGNETOHYDRODYNAMIC STABILITY OF SPHEROMAK PLASMA IN TOROIDAL FLUX CONSERVER WITH RECTANGULAR CROSS-SECTION .2. APPLICATION OF MERCIER CRITERION
S KANEKO, H TSUTSUI, T MIYAZAKI, M TAGUCHI
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 54 ( 12 ) 4570 - 4575 1985.12
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MAGNETOHYDRODYNAMIC STABILITY OF SPHEROMAK PLASMA IN TOROIDAL FLUX CONSERVER WITH RECTANGULAR CROSS-SECTION .2. APPLICATION OF MERCIER CRITERION
S KANEKO, H TSUTSUI, T MIYAZAKI, M TAGUCHI
JOURNAL OF THE PHYSICAL SOCIETY OF JAPAN 54 ( 12 ) 4570 - 4575 1985.12
Presentations
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Bootstrap Current Effects on Stable Non-Inductive Current Buildup in Low Aspect Ratio Tokamaks
Y. Nakamura, K. Tobita, S.C. Jardi, H. Tsutsui, N. Takei, S. Nishio T. Ozeki M. Sugihara, S. Tsuji-Iio
Proc. 31st EPS Conference on Plasma Physics, London, 28 June - 2 July, 2004 2004
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Plasma Production in a Small High Field Force-Balanced Coil Tokamak Based on Virial Theorem
H. Tsutsui, T. Ito, H. Ajikawa, T. Enokida, K. Hayakawa, S. Nomura, S. Tsuji-Iio, R. Shimada
Proceedings of 20th IEEE/NPSS Symposium on Fusion Engineering October 14-17, 2003 San Diego, CA USA 2004
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TSC Simulation of ITB Crash and Following Disruption Dynamics on JT-60U High-beta Reversed Shear Plasmas
N. Takei, Y. Nakamura, Y. Kawano, H, Tsutsui, T. Ozeki, K. Tobita, M. Sugihara, S. Tsuji-Iio, R. Shimada, S.C. Jardin
Proc. 31st EPS Conference on Plasma Physics, London, 28 June - 2 July, 2004 2004
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Plasma Breakdown Analysis in JFT-2M without the Use of Center Solenoid
H. Tsutsui, S. Tsuji-Iio, R. Shimada, M. Sato, K. Tsuzuki, Y. Kusama, H. Kimura
Proc. 31st EPS Conference on Plasma Physics, London, 28 June - 2 July, 2004 2004
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Virial限界コイル・トカマクの3次元応力解析
プラズマ・核融合学会 第22回年会 2005
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Design Considerations for Force-Balanced Coil Applied to SMES
The 2000 Applied Superconductivity Conference 2001
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Design Considerations for Force-Balanced Coil Applied to SMES
The 2000 Applied Superconductivity Conference 2001
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Development of Helically Winding Machine for Force-Balanced Coil and Winding Technique
The Transactions of The Institute of Electrical Engineers of Japan 2002
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電磁力平衡コイル用ヘリカル巻線機の開発とコイル製作技術
電気学会論文誌D産業応用部門誌 2002
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Force-Balanced Coil for Large Scale SMES
The 1998 Aoolied Superconductivity Conference 1999
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Force-Balanced Coil for Large Scale SMES
The 1998 Aoolied Superconductivity Conference 1999
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Back-to-Back Interconnection Systems with Energy Storage
IPEC Niigata 2005 2005
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光弾性変調を利用した磁場偏光計測器の多チャンネル化
プラズマ・核融合学会 第23回年会 2006
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Hollow電流分布中のα粒子の損失過程
プラズマ・核融合学会第23回年会 2006
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Finite Larmor Radius Effects on Ripple-Induced alpha-Particle Diffusion in Spherical Tokamaks
33rd EPS Conference on Plasma Physics 2006
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Output Power Improvement of Wind Power Stations Using Superconducting Magnetic Energy Storage
Renewable Energy 2006 2006
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Loss process of α-particle in Hollow Current
2006
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Finite Larmor Radius Effects on Ripple Diffusion in Tokamaks
The Second COE-INES Internatiuonal Symposium 2006
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JT-60Uにおける燃焼模擬実験の数値シミュレーション
プラズマ・核融合学会 第23回年会 2006
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Virial限界コイル・トカマクの3次元応力解析 II
プラズマ・核融合学会 第23回年会 2006
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CHSにおける電子密度揺動の３チャンネルレーザー散乱計測
プラズマ・核融合学会 第23回年会 2006
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CHSにおけるHCNレーザー散乱計測
プラズマ・核融合学会 第22回年会 2005
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リップル磁場中の粒子軌道の有限Larmor半径効果
プラズマ・核融合学会 第22回年会 2005
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HCN Laser Scattering Measurement on CHS
2005
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Finite Larmor Radius Effects on Particle Orbit in Ripple Fields
2005
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Simulation Modeling of Fully Non-Inductive Buildup Scenario in High Bootstrap Current Tokamaks without Center Solenoids
32nd EPS Conference on Plasma Physics 2005
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Fusion Power Supplies using Magnetic Energy Recovery Switch
SOFE2005 2005
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Simulation Modeling of Fully Non-Inductive Buildup Scenario in High Bootstrap Current Tokamaks without Center Solenoids
32nd EPS Conference on Plasma Physics 2005
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Fusion Power Supplies using Magnetic Energy Recovery Switch
SOFE2005 2005
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3D Analysis of TF-CS Hybrid Coils based on Virial Theorem
2005
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Back-to-Back Interconnection Systems with Energy Storage
IPEC Niigata 2005 2005
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Burn control simulation experiments in JT-60U
Fusion Engineering and Design 2007
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Performance test of dual modulator polarimeters in two different configurations for magneto-optic measurement of fusion devices
2007
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Numerical Evaluation of Ripple-Induced Diffusion of Suprathermal Ion in Tokamaks
34th EPS Conference on Plasma Physics 2007
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Numerical Analysis on Burn Control Simulation Experiments in JT-60U
2006
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Multi-point Magnetic Polarimeter Using Photoelastic Modulation
2006
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Three-Channel Laser Scattering Measurement of Electron Density Fluctuations in CHS
2006
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Finite Larmor Radius Effects on Ripple Diffusion in Tokamaks
The Second COE-INES Internatiuonal Symposium 2006
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Burn control simulation experiments in JT-60U
Fusion Engineering and Design 2007
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Performance test of dual modulator polarimeters in two different configurations for magneto-optic measurement of fusion devices
2007
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Output Power Improvement of Wind Power Stations Using Superconducting Magnetic Energy Storage
Renewable Energy 2006 2006
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3D Analysis of TF-CS Hybrid Coils based on Virial Theorem II
2006
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Numerical Evaluation of Ripple-Induced Diffusion of Suprathermal Ion in Tokamaks
34th EPS Conference on Plasma Physics 2007
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Finite Larmor Radius Effects on Ripple-Induced alpha-Particle Diffusion in Spherical Tokamaks
33rd EPS Conference on Plasma Physics 2006
Works
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応力最小化ヘリカルコイルを用いた超伝導電力貯蔵装置の可能性研究
2005
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TF-CSハイブリッド型電磁力平衡コイルを用いた核燃焼球状トカマクの研究
2005
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Study of ITB Crash and Following Disruption Dynamics in Burning Plasmas
2004
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コンパクト炉におけるα粒子閉じ込めに関する研究
2004
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核燃焼プラズマ圧力障壁の不可逆崩壊とディスラプション回避シナリオの研究
2004
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ヘリカルコイルの応力最適化に関する研究
2002 - 2004
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JFT-2M真空容器内エラー磁界の実測とプラズマブレークダウン特性の実験
2001 - 2002
Research Projects
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Investigation of passive stabilization of plasma position by saddle-coil 3D magnetic field
Grant number：21H01061 2021.4 - 2024.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
Grant amount：\17030000 （ Direct Cost: \13100000 、 Indirect Cost：\3930000 ）
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Demonstration of major disruption suppression by passive stabilization of plasma position with simple helical coils
Grant number：17K06990 2017.4 - 2020.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
Iio Shunji
Grant amount：\4810000 （ Direct Cost: \3700000 、 Indirect Cost：\1110000 ）
We experimentally found that the excitation of saddle-type coils can suppress the vertical shift of tokamak plasmas and can sustain the plasma center nearly on the mid-plane of the PHiX tokamak. It is for the first time in the world that saddle-type coils which are commonly employed to suppress surface MHD modes can also stabilize the vertical plasma position in tokamaks. The original objective of demonstration of major disruption suppression by passive stabilization of plasma position, however, has not been attained with simple coils.
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Improvement in tokamak plasma ramp up with closed magnetic surfaces formed with pertubation magnetic field coils
Grant number：26630469 2014.4 - 2017.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Challenging Exploratory Research
Iio Shunji, HATAKEYAMA Shoichi
Grant amount：\4030000 （ Direct Cost: \3100000 、 Indirect Cost：\930000 ）
Since the flux swing speed of future tokamak reactors with superconducting coils is limited, we aimed to reduce the one-turn loop voltage by exploiting the closed magnetic surfaces formed with external magnetic field coils. We mounted perturbation coils on the vacuum chamber of the existing small tokamak in our laboratory so that closed magnetic surfaces can be formed in combination with vertical magnetic field coils.
Although the changes in the one-turn loop voltage were not evident with and without closed magnetic surfaces due to insufficient correction of horizontal error magnetic fields, plasma breakdown without the RF power of electron cyclotron resonance was demonstrated to be possible with closed magnetic surfaces. -
Demonstration of plasma position stability with simple helical coils
Grant number：24360379 2012.4 - 2015.3
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
IIO Shunji, TSUTSUI Hiroaki, SHIMADA Ryuichi, HATAKEYAMA Shoichi
Grant amount：\18330000 （ Direct Cost: \14100000 、 Indirect Cost：\4230000 ）
Plasma position stabilizing effect of simple helical coils were confirmed by experiments on a small tokamak with circular cross-section. Three dimensional free boundary calculation showed that MHD equilibria are possible even with simple helical coils installed on half of torus and toroidal field coils and without axisymmetric vertical fields. The horizontal plasma position does not change much even when the plasma current is doubled.
The toroidal field coils (TFCs) of a newly fabricated small tokamak with elongated cross-section to demonstrate the passive plasma position control with simple helical coils are supported only at the outer side of torus by adoption of edge-wise winding of conductors. Vector control of a flywheel generator with an induction motor enabled nearly constant TFC magnetization longer than a second. -
Analysis of ripple resonance diffusion of alpha particles in burning plasma
Grant number：21560856 2009 - 2011
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C)
TSUTSUI Hiroaki, TSUJI-IIO Shunji, SHIMADA Ryuichi
Grant amount：\4550000 （ Direct Cost: \3500000 、 Indirect Cost：\1050000 ）
The confinement of alpha particles is important in tokamak systems. Guiding center equations which ignores Larmor radius are used in order to evaluate alpha-particles orbits, while the equations are not valid for spherical tokamaks in which the characteristic length of variation of magnetic field is not negligible compared with Larmor radius. Although these differences, which are finite Larmor radius effects, appear as locations of banana tips, the differences are quantitative, not qualitative. Next we analyzed the ripple-resonance diffusion, which are caused by the resonance of banana-particle motions and magnetic field ripples, numerically and theoretically. The diffusion coefficients are enhanced around the ripple resonance energy while they are not so much enhanced in the neighborhood of it. Consequently, they have a local minimum near the resonance energy, and hence they have an M-shaped energy dependence. Ripple resonance is caused by a radial change of the toroidal precession of banana particles, and creates islands in a phase space.
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Study of Spherical Tokamak of Burning Plasma with TF-CS Hybrid Force-Balanced Coils
Grant number：17360440 2005 - 2007
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
TSUTSUI Hiroaki, SHIMADA Ryuichi, TSUJI-IIO Shunji, NOMURA Shinichi, TANI Keiji, NAKAMURA Yukiharu
Grant type：Competitive
Stress distributions of a compact tokamak device Tbdoroki-II with TF-CS hybrid type forte-balanced coils were measured. The measured values were similar to analytically evaluated values, and the reduction of stress was experimentally confirmed.]
A fully-inonduced current start up process of a spherical torus (ST) with a transport model of CDBM was numerically simulated. This results show the possibility of a current oscillation by interactions of profiles of internal transport barrier, pressure and boot strap current. A possibility of an over-drive of plasma current was also shown.
A finite Larmor radius effect in ST is important because of the weakness of magnetic field compared with that of conventional tokamak. A computation code to calculate trajectory and diffusion coefficient without guiding center approximation was developed. The results were compared with those of conventional tokamak by guiding center approximation. Especially, we investigated an anomalous diffusion by a resonance of toroidal field ripple and banana particles, and evaluated an energy dependence of the diffusion coefficients. The result shows that Larmor motion affects the toroidal phase of banana tip, and softens the resonance. In order to investigate the physical mechanism of the resonance, we use the simple equilibrium configuration with a circular cross section of a conventional tokamak. We numerically found that the peaks of diffusion coefficients appears around the resonance energies of axisymmetric magnetic field. Moreover, distortion of trajectories by the resonance in a phase space makes island configurations, transverse motions by collisions enhance the diffusion. -
Study of Burning Spherical Tokamak with TF-CS Hybrid Force-Balanced Coils
2005
Grant-in-Aid for Scientific Research
Grant type：Competitive
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Studies on Irreversible Collapse of Transport Barriers and Disruption Avoidance Scenarios in Burning Plasmas
Grant number：16360464 2004 - 2006
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
NAKAMURA Yukiharu, KOIDE Yoshihiko, SAKAMOTO Yoshiteru, TSUTSUI Hiroaki, SUGIHARA Masayoshi, TAKECHI Manabu
Grant type：Competitive
Purpose of the present study is to provide practical guideline for fusion reactor design and operation scenario with disruption avoidance. Regarding negative shear plasmas with transport barriers difficult to maintain, we have clarified characteristics of frequent disruptions, and provided a stable pathway to attain high-beta, high bootstrap current plasmas while taking a detour of the disruption avoidance.
First, a self-consistent simulation code was developed to model a transport improvement in accordance with the magnetic shear and a consequent formation of the plasma pressure and bootstrap current profiles. Physics models of disruption events such as thermal quench, associated current spike and vertical displacement were formulated. Additionally, physics model of the most common disruption, which has been frequently occurring in low-beta regime discharges, was provided for a guideline along which the disruptions can be avoided. A new neural-net predictor that can be used even for beta-limit typed disruption normally observed without any of precursors and thus too hard to predict, was presented and verified by JT-60U experiments. In regard to high confinement plasmas fitting in with high bootstrap current, we presented steady-state, advanced operation scenarios, i.e., non-inductive current ramp-up and recharging of center solenoid current vigorously using the bootstrap current. Moreover, an innovative burning scenario was proposed to control the structure of transport barriers using a small inductive perturbation of externally applied electric field. Underlying mechanism of a beta-collapse with a regular intermittency observed in JT-60U negative shear discharge was clarified that "Return Current" induced by the NBCD turn-off underwent a spatial diffusion to modify the transport barrier, increasing in the stored energy that led to a MHD instability with a destruction profile localized around peripheral region of the negative shear plasma. The study has presented such the important knowledges useful for the sake of disruption avoidance operation scenarios. -
Study of ITB Crash and Disruption in Burning Plasma
2004
Grant-in-Aid for Scientific Research
Grant type：Competitive
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Development of Multi-Channel Magnetic Field Sensor Utilizing Faraday Elements
Grant number：13480131 2001 - 2004
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
TSUJI Shunji, SHIMADA Ryuichi, TSUTSUI Hiroaki
Grant amount：\17100000 （ Direct Cost: \17100000 ）
To develop a polarimeter which measures magnetic field strength by the use of Faraday elements, the cross Nichole method, polarization modulation method and polarization rotation method were tested and compared.
Although the cross Nichole method does not have enough accuracy, which depends on the polarization angle, it was confirmed that its fast response and low cost is superior to the two heterodyne methods.
The measurement accuracy of the polarization modulation method utilizing two photoelastic modulators also depends on the polarization angle ; the standard deviation has a maximum of about 0.07 deg. around a polarization angle of 22.5 deg. and the signal to noise ratio was evaluated to has a peak of about 150 near 0 deg. The stability of the zero level is much better than that of the polarization rotation method. The variations of the zero level were within 0.01 deg.
For the light source of the polarization rotation, a Zeeman-effect laser was adopted to stabilize the zero level of the phase difference. The lasing, however, becomes unstable when a polarization maintaining optical fiber was used for free optical layout of multi-channel measurements. With an optical isolator, the temperature of which was well controlled to be constant, can reduce the backward light and hence the lasing was managed to be stable. When the whole optical isolator was put in a isotherm box, the measurement accuracy was demonstrated to be 0.01% for a long period of 10000 s.
The Verdet constants of candidate Faraday elements such as lead glass and ZnSe were evaluated under magnetic fields up to 5 T using a superconducting magnet. -
Development of Long-Term Magnetic Field Sensor Utilizing Faraday Rotation in Optical Fiber
Grant number：09558063 1997 - 1999
Japan Society for the Promotion of Science Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B)
TSUJI-IIO Shunji, TERAI Kiyohisa, TSUTSUI Hiroaki, SHIMADA Ryuichi, TAKAHASHI Masao
Grant amount：\12500000 （ Direct Cost: \12500000 ）
Accurate measurements of the plasma current and magnetic fields around the plasma are indispensable for real-time control and data analysis in magnetic fusion devices. Commonly used inductive pickup loops, however, suffer from zero-point drifts of integration in the case of long integration over several hundred seconds. To avoid this problem, a heterodyne polarimeter which measures the Faraday effect was developed as a magnetic field sensor for long-pulsed fusion devices. The wavelength of laser beam was chosen to be 850 nm since the radiation-induced loss in optical fibers is significant below 800 nm while the Faraday rotation angle decreases with increasing wavelength. By the use of a distributed Bragg reflector laser diode and a Faraday isolator, excellent stability of phase measurement was attained. We confirmed that the use of a polarization maintaining fiber between the phase shifter part and the sensor part did not degrade the phase stability when the laser beam coupling to the fiber was optimized. The phase resolution was raised to up to 0.01 deg. by the digital complex demodulation and digital band-pass filtering of beat signals. Hence a low birefringence silica fiber is sufficient for a plasma current sensor of fusion devices instead of a flint glass fiber with a high Verdet constant.
Although the Verdet constant of heavily Tb^<3+>-doped paramagnetic glass is larger than that of ZnSe by about a factor of 1.4, ZnSe is superior to the former in terms of negligible temperature dependence. With a 40-mm long ZnSe sensing rod, resolutions of the magnetic field strength of about 5 and 2 gauss were found to be possible with time responses of 1 ms and 10 ms, respectively. -
ディスラプション時に発生する逃走電子の制御に関する研究
Grant number：05780379 1993
日本学術振興会 科学研究費助成事業 奨励研究(A)
筒井 広明
Grant amount：\900000 （ Direct Cost: \900000 ）
現在、大型トカマク装置における最重要課題の一つがプラズマディスラプションの回避および制御である。逃走電子は、ディスラプション後、数百ミリ秒存在することもあり、その振る舞いを調べることはディスラプション制御に必要不可欠である。
平衡状態は、一般的に自由エネルギー最小状態として実現される。エネルギー的に閉じた系では、その自由エネルギーは通常のポテンシャルエネルギーと一致する。しかし、トカマク装置は外部にエネルギー源(電源)を持つため、その自由エネルギーの扱いには注意を要する。我々は、その自由エネルギーの表式を導き、それを用いて、トカマクのディスラプション現象の模擬に成功した。代表的な結果とては、電流クエンチ時に電流が一旦増加し、その後減少する現象を計算機によって再現した。これは、垂直位置不安定性によってプラズマがAlfven時間で移動しインダクタンスが変化するためである。
更に、大型トカマクにおいては、真空容器の時定数の長さも間題となる。外部から加えた電場がしみこむのに時間がかかり、そのうえ、ディスラプション時に真空容器に流れる誘導電流が、なかなか減衰しないからである。このような状況で、プラズマを有効に制御するため、状態フィードバックを用いた制御(現代制御)を適用した。その結果、真空容器外のコイルを用いて、プラズマの位置及び電流をそれぞれ独立に制御できることを示した。さらに、最適制御理論を適用し、応答の即応性と必要な電源電圧との関係を明らかにした。
また、粒子軌道コードについては現在開発中である。プラズマ点火時においても、真空容器の時定数の長さは問題となる。この問題についても、同様の方法で解析し、Break-Downの条件を解析する予定である。 -
Virial定理を用いた超伝導エネルギー貯蔵に関する研究
Grant type：Competitive
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Optimization of Superconducting Magnetic Energy Storage by use of Virial Theorem
Grant type：Competitive