論文 - 岡本 敦
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Kazutoshi YASUI, Takaaki FUJITA, Atsushi OKAMOTO, Yuichi KAWACHI
20 巻 頁： 1203049 2025年10月
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Kota TAKEDA, Atsushi OKAMOTO, Takaaki FUJITA, Yuichi KAWACHI, Minami SUGIMOTO, Muneo KOIKE, Koki SATO, Yuto YAMADA, Kazuhiro TORII
20 巻 頁： 1201038 2025年7月
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Koki SATO, Atsushi OKAMOTO, Takaaki FUJITA, Yuichi KAWACHI, Mimami SUGIMOTO, Muneo KOIKE, Yuto YAMADA, Kota TAKEDA, Kazuhiro TORII, Hiroyuki TAKAHASHI
20 巻 頁： 1201031 2025年6月
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Yuichi KAWACHI, Atsushi OKAMOTO, Koki SATO, Yuto YAMADA, Kota TAKEDA, Takaaki FUJITA
20 巻 頁： 1201030 2025年5月
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Measurement of ion temperature during the intermittent negative spike in floating potential 査読有り 国際誌
Yuto YAMADA, Atsushi OKAMOTO, Takaaki FUJITA, Yuichi KAWACHI, Minami SUGIMOTO, Koki SATO, Muneo KOIKE, Kota TAKEDA, Kazuhiro TORII, Shinji YOSHIMURA
20 巻 頁： 1201027 2025年5月
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Three-Dimensional Analysis of Eddy Current in TOKASTAR-2 査読有り 国際誌
Tsunoda, K; Fujita, T; Okamoto, A; Morizawa, S; Kato, S; Oshiro, T; Nakagawa, S; Murase, T; Isobe, M; Shimizu, A
PLASMA AND FUSION RESEARCH 20 巻 2025年1月
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Power Balance in TOKASTAR-2 Small Tokamak for Feasibility Study on Light Source Application 招待有り 査読有り Open Access
Okamoto, A., Kimata, S., Tsunoda, K., Kado, K., Yasuda, K., Fujita, T.
Proceedings of the 15th Asia Pacific Physics Conference 頁： 219 - 227 2024年12月
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Yagasaki, K; Okamoto, A; Sugimoto, M; Higuchi, S; Koike, M; Sato, K; Yamada, Y; Fujita, T
JOURNAL OF NUCLEAR SCIENCE AND TECHNOLOGY 2024年5月
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Laser Thomson scattering system for anisotropic electron temperature measurement in NUMBER 査読有り 国際誌 Open Access
A. Okamoto, S. Higuchi, K. Sato, Y. Yamada, M. Koike, M. Sugimoto and T. Fujita
Journal of Instrumentation 18 巻 頁： C10013-0 - C10013-8 2023年10月
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Volumetric Recombination in the Linear ECR Plasma Device NUMBER 査読有り 国際誌 Open Access
Yagasaki, K; Okamoto, A; Fujita, T; Sugimoto, M; Higuchi, S; Koike, M; Sato, K; Yamada, Y
PLASMA AND FUSION RESEARCH 18 巻 頁： 2401082-1 - 2401082-7 2023年10月
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Structure of intermittent variation of floating potential in a converging field following a magnetic beach ECR plasma source 査読有り 国際誌 Open Access
Okamoto Atsushi, Higuchi Shunya, Yamada Yuto, Sato Koki, Koike Muneo, Yagasaki Konan, Sugimoto Minami, Fujita Takaaki
JAPANESE JOURNAL OF APPLIED PHYSICS 62 巻 ( SL ) 2023年9月
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Optimization of Magnetic Field Based on Electron Orbit Measurement in TOKASTAR-2 Helical Plasmas 査読有り 国際誌 Open Access
KADO, K; FUJITA, T; OKAMOTO, A; ARIMOTO, H; TSUNODA, K; MORIZAWA, S
PLASMA AND FUSION RESEARCH 17 巻 2022年6月
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Power balance in the smallest tokamak 査読有り 国際誌 Open Access
Kimata Sora, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Yasuda Kouhei, Kado Keitaro, Tsunoda Keishi
AIP ADVANCES 12 巻 ( 4 ) 2022年4月
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On electron temperature rise in divertor relevant recombining plasma along magnetic field line 査読有り 国際誌 Open Access
Takahashi H., Winarto M. N., Okamoto A., Boonyarittipong P., Seino T., Kusabiraki K., Sakata Y., Yoshimura K., Nishimura R., Kitajima S., Matsuyama A., Tobita K.
PHYSICS OF PLASMAS 29 巻 ( 3 ) 頁： 032508 2022年3月
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Edge Transport Barrier Models for Simulating H-Mode Operation Scenarios in DEMO with Integrated Plasma Transport Code TOTAL 査読有り 国際誌 Open Access
Itakura, Y; Fujita, T; Okamoto, A
PLASMA AND FUSION RESEARCH 17 巻 頁： 1403016 2022年
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Stabilization of plasma vertical position of elongated tokamak using upper and lower triangular coils 査読有り 国際誌
Yasuda K., Fujita T., Okamoto A., Arimoto H., Kimata S., Kado K., Tsunoda K.
PHYSICS OF PLASMAS 28 巻 ( 8 ) 2021年8月
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Radial Profile Estimation of Electron Density in a Linear Plasma Device NUMBER Using a Single Line-of-Sight Signal 査読有り Open Access
Sugimoto Minami, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Higuchi Shunya, Yagasaki Konan
PLASMA AND FUSION RESEARCH 16 巻 2021年
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Ion Collision Effect in Collisional Radiative Processes in Magnetized Plasma 招待有り 査読有り Open Access
Okamoto Atsushi
PROCEEDINGS OF THE 14TH ASIA-PACIFIC PHYSICS CONFERENCE 2319 巻 頁： 030007 2021年
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Study on Stabilization of Vertical Position of Tokamak Plasma with Local Helical Coils in TOKASTAR-2 査読有り Open Access
Yasuda Kouhei, Fujita Takaaki, Okamoto Atsushi, Arimoto Hideki, Ikeda Ryohei, Kimata Sora, Kado Keitaro
PLASMA AND FUSION RESEARCH 15 巻 2020年11月
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High-Speed Analysis of Heating and Current Drive with Neutral Beam Injection in Tokamak Plasma 査読有り Open Access
Funabashi Ryoya, Fujita Takaaki, Okamoto Atsushi
PLASMA AND FUSION RESEARCH 15 巻 2020年10月
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Dependence of Plasma Parameters in Hydrogen Discharges on Magnetic Field Configuration and Neutral Pressure in the DT-ALPHA Device 査読有り Open Access
Seino Tomohiro, Takahashi Hiroyuki, Boonyarittipong Peerapat, Saikyo Takeshi, Ogasawara Kenta, Okamoto Atsushi, Kitajima Sumio, Tobita Kenji
PLASMA AND FUSION RESEARCH 15 巻 2020年8月
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Development of an ion beam measurement instrument for divertor simulation experiments in radio-frequency plasma 査読有り Open Access
Takahashi Hiroyuki, Okamoto Atsushi, Kitajima Sumio, Tobita Kenji
AIP ADVANCES 10 巻 ( 8 ) 2020年8月
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Dependence of Operation Density on the Density Profile Shape in DEMO Plasmas with Ar Injection for Divertor Heat Load Reduction 査読有り Open Access
Sakai Ryosuke, Fujita Takaaki, Okamoto Atsushi
PLASMA AND FUSION RESEARCH 15 巻 2020年5月
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Magnetic Field Dependence of Transition to High Electron Density Phase in a Linear Plasma Device NUMBER 査読有り Open Access
Hachikubo Hiroki, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Ochiai Ryosuke, Sugimoto Minami, Iizuka Kento
PLASMA AND FUSION RESEARCH 15 巻 頁： 2401042 2020年
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Equilibrium Analysis of Tokamak Plasma Including the Eddy Current Effects in TOKASTAR-2 査読有り Open Access
Ikeda Ryohei, Fujita Takaaki, Arimoto Hideki, Okamoto Atsushi, Yasuda Kouhei, Kimata Sora, Kado Keitaro
PLASMA AND FUSION RESEARCH 15 巻 頁： 2402047 2020年
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Development and Evaluation of Ion Energy Analyzer for Energetic Ion Measurement in a Linear Plasma Device NUMBER 査読有り Open Access
Ochiai Ryosuke, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Hachikubo Hiroki, Sugimoto Minami, Iizuka Kento
PLASMA AND FUSION RESEARCH 15 巻 頁： 2401040 2020年
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Variation of Doppler Broadening in High-Temperature Bubbles Created in an ECR Plasma 査読有り 国際誌 Open Access
Okamoto, A; Yoshimura, S; Terasaka, K; Tanaka, MY
PLASMA AND FUSION RESEARCH 14 巻 頁： 1201165 2019年12月
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Derivation of bootstrap current fraction scaling formula for 0-D system code analysis 査読有り 国際誌 Open Access
Sakai Ryosuke, Fujita Takaaki, Okamoto Atsushi
FUSION ENGINEERING AND DESIGN 149 巻 2019年12月
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Volumetric Recombination under Existence of Energetic Electron and Ion in DT-ALPHA
Atsushi Okamoto and Hiroyuki Takahashi
Topical Seminar on "Physics, Diagnostics and Analysis of Magnetic Fusion Divertor Plasmas", The 10th International Symposium of Advanced Energy Science, 4-6 Sep. 2019, Uji, Kyoto ( Parallel Seminar I ) 頁： 1050 2019年9月
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Influence of the formation of a bi-Maxwellian distribution on volumetric recombining plasma spectroscopy 査読有り
Takahashi H., Okamoto A., Boonyarittipong P., Saikyo T., Ogasawara K., Seino T., Tobita K., Kitajima S.
PHYSICS OF PLASMAS 26 巻 ( 3 ) 頁： 033506 2019年3月
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Economy of Tokamak Neutron Source for Transmutation of Transuranics 査読有り Open Access
Sakai Ryosuke, Fujita Takaaki, Okamoto Atsushi
PLASMA AND FUSION RESEARCH 14 巻 頁： 1405040 2019年2月
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Validation of ion temperature measurement using an ion sensitive probe technique in finite boundary RF plasma 査読有り
Takahashi H., Ogasawara K., Boonyarittipong P., Saikyo T., Seino T., Kitajima S., Okamoto A., Tobita K.
PHYSICS OF PLASMAS 26 巻 ( 2 ) 頁： 022511 2019年2月
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High-Density Plasma Production in Converging Field Following a Magnetic Beach Plasma Source 査読有り
Okamoto Atsushi, Ochiai Ryosuke, Satou Katsuya, Hachikubo Hiroki, Sugimoto Minami, Fujita Takaaki, Takahashi Hiroyuki
PLASMA AND FUSION RESEARCH 14 巻 頁： 2401005 2019年
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Extended Range of Stable Radial Position of Tokamak Plasma in TOKASTAR-2 査読有り
Muraoka Kenji, Fujita Takaaki, Arimoto Hideki, Okamoto Atsushi, Itou Hiromasa, Sugioka Ryoichi, Minoura Masato, Yasuda Kouhei, Yokoyama Ryoma, Yamauchi Takahiro
PLASMA AND FUSION RESEARCH 13 巻 頁： 1402111 2018年9月
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Determining the Closed Flux Surface in a Helical Plasma in TOKASTAR-2 with an Electrostatic Probe 査読有り
Itou Hiromasa, Fujita Takaaki, Arimoto Hideki, Okamoto Atsushi, Muraoka Kenji, Sugioka Ryoichi, Yasuda Kohei, Yokoyama Ryoma, Minoura Masato, Yamauchi Takahiro
PLASMA AND FUSION RESEARCH 13 巻 頁： 1402039 2018年5月
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Divertor Plasma Simulation Experiment Using Hydrogen Ionizing Plasma and Helium Ion Beam in an RF Plasma Source DT-ALPHA 査読有り
Takahashi Hiroyuki, Kobayashi Takahiko, Boonyarittipong Peerapat, Saikyo Takeshi, Ishikawa Yusuke, Ogasawara Kenta, Okamoto Atsushi, Tobita Kenji, Kitajima Sumio, Hashizume Hidetoshi
PLASMA AND FUSION RESEARCH 13 巻 頁： 3401053 2018年
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Estimation of Tokamak Plasma Position and Shape in TOKASTAR-2 Using Magnetic Field Measurement 査読有り
Yasuda Kouhei, Arimoto Hideki, Okamoto Atsushi, Fujita Takaaki, Minoura Masato, Yokoyama Ryoma, Yamauchi Takahiro
PLASMA AND FUSION RESEARCH 13 巻 頁： 3402072 2018年
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Application of He I Line Intensity Ratio Method to Tokamak Plasma in TOKASTAR-2 査読有り
Yokoyama Ryoma, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Minoura Masato, Yasuda Kohei, Yamauchi Takahiro
PLASMA AND FUSION RESEARCH 13 巻 頁： 3402047 2018年
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Magnetic Field Configuration Dependence of Plasma Production and Parallel Transport in a Linear Plasma Device NUMBER 査読有り
Hamada Daichi, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Satou Katsuya, Ochiai Ryosuke
PLASMA AND FUSION RESEARCH 13 巻 頁： 3401044 2018年
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Development of Ion Sensitive Probe and Its Application to RF Plasma Device DT-ALPHA 査読有り
Kobayashi Takahiko, Takahashi Hiroyuki, Kitajima Sumio, Okamoto Atsushi, Tobita Kenji, Boonyarittipong Peerapat, Saikyo Takeshi, Ishikawa Yusuke, Ogasawara Kenta, Hashizume Hidetoshi
PLASMA AND FUSION RESEARCH 13 巻 頁： 3401090 2018年
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Development of a High Energy Hydrogen Beam Injection System for Divertor Plasma Simulation Experiments on the DT-ALPHA Device 査読有り
Boonyarittipong Peerapat, Takahashi Hiroyuki, Kitajima Sumio, Okamoto Atsushi, Tobita Kenji, Kobayashi Takahiko, Saikyo Takeshi, Ishikawa Yusuke, Ogasawara Kenta, Hashizume Hidetoshi
PLASMA AND FUSION RESEARCH 13 巻 頁： 3402102 2018年
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Influence of electron energy distribution on helium recombining plasma diagnostics using line emissions 査読有り
Takahashi H., Okamoto A., Kitajimal S., Kobayashi T., Boonyarittipong P., Miura T., Nakamura D., Kon J., Saikyo T., Tanaka Y., Goto M.
CONTRIBUTIONS TO PLASMA PHYSICS 57 巻 ( 8 ) 頁： 322-328 2017年9月
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Optimization study of normal conductor tokamak for commercial neutron source 査読有り
Fujita T., Sakai R., Okamoto A.
NUCLEAR FUSION 57 巻 ( 5 ) 頁： 056019 - 1-7 2017年5月
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Experimental study of the volumetric recombination under energetic ion flow using a radio-frequency plasma source 査読有り
H. Takahashi, A. Okamoto, D. Nakamura, T. Miura, P. Boonyarittipong, and S. Kitajima
Physics of Plasmas 23 巻 頁： 112510-1 - 112510-7 2016年11月
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Asymmetry of velocity distribution function and inhomogeneity-induced flow associated with neutral depletion structure in an ECR plasma 査読有り Open Access
K. Terasaka, M. Hattori, K. Ogiwara, S. Yoshimura, M. Aramaki, A. Okamoto, and M. Y. Tanaka
Physics of Plasmas 23 巻 頁： 112120-1 - 112120-5 2016年11月
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Helium Volumetric Recombining Plasma Formation for Energetic Ion Injection in Radio-Frequency Plasma Device DT-ALPHA 査読有り
H. Takahashi, A. Okamoto, T. Miura, D. Nakamura, P. Boonyarittipong, S. Sekita and S. KItajima
Plasma and Fusion Research 11 巻 頁： 2402059 2016年
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Measurement of Tokamak Plasma with the External Helical Field Using a High-Speed Camera in TOKASTAR-2 査読有り
T. Sakito, H. Arimoto, T. Fujita, A. Okamoto, Y. Shimooka, H. Itou, R. Sugioka, K. Muraoka, K. Yasuda and R. Yokoyama
Plasma and Fusion Research 11 巻 頁： 2402074 2016年
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Particle Pinch Model of Passing/Trapped High-Z Impurity with Centrifugal Force Effect 査読有り
Y. Shimizu, T. Fujita, A. Okamoto, H. Arimoto, N. Hayashi, K. Hoshino, T. Nakano and M. Honda
Plasma and Fusion Research 11 巻 頁： 2403082 2016年
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Development of Magnetic Flux Surface Measurement Method on TOKASTAR-2 査読有り
Y. Shimooka, H. Arimoto, T. Fujita, A. Okamoto, T. Sakito, H. Itou, K. Muraoka, R. Sugioka, K. Yasuda and R. Yokoyama
Plasma and Fusion Research 11 巻 頁： 2402110 2016年
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Energetic Helium Ion Injection into Helium Recombining Plasma in Radio-Frequency Plasma Source 査読有り
H. Takahashi, A. Okamoto, T. Takahashi, and S. Kitajima
Fusion Science and Technology 68 巻 頁： 109-195 2015年
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Observation of Intermittent Transition by Electrode Biasing in Heliotron J 査読有り
K. Shimizu, S. Kitajima, A. Okamoto, Y. Sato, J. Tachibana, T. Oku, M. Takayama, F. Sano, T. Mizuuchi, K. Nagasaki, H. Okada, S. Kado, S. Kobayashi, S. Yamamoto, S. Ohshima, Y. Suzuki, M. Yokoyama, and H. Takahashi
Plasma and Fusion Research 10 巻 頁： 3402061 2015年
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Exploration of spontaneous vortex formation and intermittent behavior in ECR plasmas: The HYPER-I experiments 査読有り
S. Yoshimura, K. Terasaka, E. Tanaka, M. Aramaki, A. Okamoto, K. Nagaoka and M. Y. Tanaka
Journal of Plasma Physics 81 巻 頁： 345810204 2015年
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講座「今日から始める磁場閉じ込めプラズマ実験」プラズマ容器を真空にひくよ！ 招待有り
岡本敦
プラズマ・核融合学会誌 90 巻 ( 9 ) 頁： 553-561 2014年9月
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Development of In-Situ Energetic Ion Injector for Magnetically Confined Plasmas using Hydrogen Storage Electrode 査読有り
A. Okamoto, T. Oku, S. Koike, Y. Sato, K. Ishii, and S. Kitajima
Review of Scientific Instruments 85 巻 頁： 02B302 2014年
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Effect of Energetic Ion on Spatial Distribution of Recombining Plasma 査読有り
A. Okamoto, A. Daibo, S. Kitajima, T. Kumagai, H. Takahashi, T. Takahashi, and S. Tsubota
JPS Conference Proceedings 1 巻 頁： 015010 2014年
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Ion Flow Measurement Using a Directional Langmuir Probe in the Radio Frequency Plasma Source DT-ALPHA 査読有り
T. Kumagai, A. Okamoto, H. Takahashi, A. Daibo, T. Takahashi, S. Tsubota, and S. Kitajima
JPS Conference Proceedings 1 巻 頁： 015043 2014年
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Bursting high-frequency fluctuation observed in biased plasma in TU-Heliac 査読有り
S. Koike, S. Kitajima, A. Okamoto, K. Ishii, Y. Sato, J. Tachibana, T. Oku, K. Shimizu, S. Inagaki, Y. Suzuki, H. Takahashi and M. Takayama
Nuclear Fusion 54 巻 頁： 114013 2014年
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Electron Energy Distribution in a Divertor Simulating Device with an RF Source 査読有り
H. Takahashi, A. Okamoto, T. Kumagai, A. Daibo, T. Takahashi, S. Tsubota and S. KItajima
Plasma and Fusion Research 9 巻 頁： 3401065 2014年
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Development of a High CMRR Magnetic Probe for the Biased Plasma in TU-Heliac 査読有り
S. Koike, S. Kitajima, A. Okamoto, K. Ishii, Y. Sato, J. Tachibana, T. Oku, K. Shimizu, S. Inagaki, Y. Suzuki, H. Takahashi and M. Takayama
Plasma and Fusion Research 9 巻 頁： 1202053 2014年
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Direct Measurement of Ion Temperature and Poloidal Rotation Velocity with Doppler Spectroscopy during Bifurcation in Tohoku University Heliac 査読有り
T. Oku, S. Kitajima, K. Ishii, Y. Sato, J. Tachibana, S. Koike, K. Shimizu, A. Okamoto, H. Takahashi, M. Takayama and S. Inagaki
Plasma and Fusion Research 9 巻 頁： 3402051 2014年
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Development of ion source for simulation of edge localized mode in divertor plasma 査読有り
A. Daibo, A. Okamoto, H. Takahashi, T. Kumagai, T. Takahashi, S. Tsubota and S. Kitajima
Review of Scientific Instruments 85 巻 頁： 02B307 2014年
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Effects of Roughness and Temperature on Low-energy Hydrogen Ion Reflection from Silicon and Graphite Surfaces 査読有り Open Access
N. Tanaka, S. Kato, T. Miyamoto, M. Nishiura, K. Tsumori, Y. Matsumoto, T. Kenmotsu, A. Okamoto, S. Kitajima, M. Wada, M. Sasao, and H. Yamaoka
Review of Scientific Instruments 85 巻 頁： 02C311 2014年
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Line Spectra Observation of the Rydberg He Atoms due to Volumetric Recombination in the RF Plasma Source DT-ALPHA 査読有り
H. Takahashi, A. Okamoto, Y. Kawamura, T. Kumagai, A. Daibo, and S. Kitajima
Transactions of Fusion Science and Technology 63 巻 頁： 404-407 2013年
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Development of Multi-Port Imaging System for Divertor Simulating Linear Device 査読有り
A. Okamoto, Y. Kawamura, H. Takahashi, T. Kumagai, A. Daibo, and S. Kitajima
Transactions of Fusion Science and Technology 63 巻 頁： 205-208 2013年
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Distribution of Footprint Marked by Energetic Alpha Particle Bombardment on the First Wall 査読有り
A. Okamoto, M. Isobe, S. Kitajima, and M. Sasao
Journal of Nuclear Materials 438 巻 頁： S883-S886 2013年
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An experimental comparison of gross and net erosion of Mo in the DIII-D divertor 査読有り
P.C. Stangeby, D.L. Rudakov, W.R. Wampler, J.N. Brooks, N.H. Brooks, D.A. Buchenauer, J.D. Elder, A. Hassanein, A.W. Leonard, A.G. McLean, A. Okamoto, T. Sizyuk, J.G. Watkins, C.P.C. Wong
Journal of Nuclear Materials 438 巻 頁： S309-S312 2013年
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Transition of poloidal viscosity by electrode biasing in the Large Helical Device 査読有り
S. Kitajima, H. Takahashi, K. Ishii, Y. Sato, M. Kanno, J. Tachibana, A. Okamoto, M. Sasao, S. Inagaki, M. Takayama, S. Masuzaki, M. Shoji, N. Ashikawa, M. Tokitani, M. Yokoyama, Y. Suzuki, S. Satake, T. Ido, A. Shimizu, C. Suzuki, Y. Nagayama, T. Tokuzawa, K. Nishimura, T. Morisaki and the LHD Experiment Group
Nuclear Fusion 53 巻 頁： 073014 2013年