研究者詳細 - 岡本　敦

論文 - 岡本　敦

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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

Power Balance in TOKASTAR-2 Small Tokamak for Feasibility Study on Light Source Application 招待有り査読有り

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

Development of a simple calculation method for the conductance of rarefied gas flow in cylindrical pipe applicable to divertor exhaust investigation of nuclear fusion reactor 査読有り国際誌

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

Laser Thomson scattering system for anisotropic electron temperature measurement in NUMBER 査読有り国際誌

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

Volumetric Recombination in the Linear ECR Plasma Device NUMBER 査読有り国際誌

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

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

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

Optimization of Magnetic Field Based on Electron Orbit Measurement in TOKASTAR-2 Helical Plasmas 査読有り国際誌

KADO, K; FUJITA, T; OKAMOTO, A; ARIMOTO, H; TSUNODA, K; MORIZAWA, S

PLASMA AND FUSION RESEARCH 17 巻 2022年6月

Power balance in the smallest tokamak 査読有り国際誌

Kimata Sora, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Yasuda Kouhei, Kado Keitaro, Tsunoda Keishi

AIP ADVANCES 12 巻 ( 4 ) 2022年4月

On electron temperature rise in divertor relevant recombining plasma along magnetic field line 査読有り国際誌

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

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

Itakura, Y; Fujita, T; Okamoto, A

PLASMA AND FUSION RESEARCH 17 巻頁： 1403016 2022年

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

Radial Profile Estimation of Electron Density in a Linear Plasma Device NUMBER Using a Single Line-of-Sight Signal 査読有り

Sugimoto Minami, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Higuchi Shunya, Yagasaki Konan

PLASMA AND FUSION RESEARCH 16 巻 2021年

Ion Collision Effect in Collisional Radiative Processes in Magnetized Plasma 招待有り査読有り

Okamoto Atsushi

PROCEEDINGS OF THE 14TH ASIA-PACIFIC PHYSICS CONFERENCE 2319 巻頁： 030007 2021年

Study on Stabilization of Vertical Position of Tokamak Plasma with Local Helical Coils in TOKASTAR-2 査読有り

Yasuda Kouhei, Fujita Takaaki, Okamoto Atsushi, Arimoto Hideki, Ikeda Ryohei, Kimata Sora, Kado Keitaro

PLASMA AND FUSION RESEARCH 15 巻 2020年11月

High-Speed Analysis of Heating and Current Drive with Neutral Beam Injection in Tokamak Plasma 査読有り

Funabashi Ryoya, Fujita Takaaki, Okamoto Atsushi

PLASMA AND FUSION RESEARCH 15 巻 2020年10月

Dependence of Plasma Parameters in Hydrogen Discharges on Magnetic Field Configuration and Neutral Pressure in the DT-ALPHA Device 査読有り

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

Development of an ion beam measurement instrument for divertor simulation experiments in radio-frequency plasma 査読有り

Takahashi Hiroyuki, Okamoto Atsushi, Kitajima Sumio, Tobita Kenji

AIP ADVANCES 10 巻 ( 8 ) 2020年8月

Dependence of Operation Density on the Density Profile Shape in DEMO Plasmas with Ar Injection for Divertor Heat Load Reduction 査読有り

Sakai Ryosuke, Fujita Takaaki, Okamoto Atsushi

PLASMA AND FUSION RESEARCH 15 巻 2020年5月

Magnetic Field Dependence of Transition to High Electron Density Phase in a Linear Plasma Device NUMBER 査読有り

Hachikubo Hiroki, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Ochiai Ryosuke, Sugimoto Minami, Iizuka Kento

PLASMA AND FUSION RESEARCH 15 巻頁： 2401042 2020年

Equilibrium Analysis of Tokamak Plasma Including the Eddy Current Effects in TOKASTAR-2 査読有り

Ikeda Ryohei, Fujita Takaaki, Arimoto Hideki, Okamoto Atsushi, Yasuda Kouhei, Kimata Sora, Kado Keitaro

PLASMA AND FUSION RESEARCH 15 巻頁： 2402047 2020年

Development and Evaluation of Ion Energy Analyzer for Energetic Ion Measurement in a Linear Plasma Device NUMBER 査読有り

Ochiai Ryosuke, Okamoto Atsushi, Fujita Takaaki, Arimoto Hideki, Hachikubo Hiroki, Sugimoto Minami, Iizuka Kento

PLASMA AND FUSION RESEARCH 15 巻頁： 2401040 2020年

Variation of Doppler Broadening in High-Temperature Bubbles Created in an ECR Plasma 査読有り国際誌

Okamoto, A; Yoshimura, S; Terasaka, K; Tanaka, MY

PLASMA AND FUSION RESEARCH 14 巻頁： 1201165 2019年12月

Derivation of bootstrap current fraction scaling formula for 0-D system code analysis 査読有り国際誌

Sakai Ryosuke, Fujita Takaaki, Okamoto Atsushi

FUSION ENGINEERING AND DESIGN 149 巻 2019年12月

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

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

Economy of Tokamak Neutron Source for Transmutation of Transuranics 査読有り

Sakai Ryosuke, Fujita Takaaki, Okamoto Atsushi

PLASMA AND FUSION RESEARCH 14 巻頁： 1405040 2019年2月

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

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

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

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

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

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

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

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

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

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

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

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

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

Asymmetry of velocity distribution function and inhomogeneity-induced flow associated with neutral depletion structure in an ECR plasma 査読有り

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

Effects of Roughness and Temperature on Low-energy Hydrogen Ion Reflection from Silicon and Graphite Surfaces 査読有り

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

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

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

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

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

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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