Zobrazeno 1 - 10
of 180
pro vyhledávání: '"Sadayoshi, MURAKAMI"'
Autor:
Yuya Morishita, Sadayoshi Murakami, Naoki Kenmochi, Hisamichi Funaba, Ichihiro Yamada, Yoshinori Mizuno, Kazuki Nagahara, Hideo Nuga, Ryosuke Seki, Masayuki Yokoyama, Genta Ueno, Masaki Osakabe
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-11 (2024)
Abstract Magnetic fusion plasmas, which are complex systems comprising numerous interacting elements, have large uncertainties. Therefore, future fusion reactors require prediction-based advanced control systems with an adaptive system model and cont
Externí odkaz:
https://doaj.org/article/63e455de52fe42378329afec9f5375d4
Autor:
Yasuhiro, Yamamoto, Sadayoshi, Murakami, Chang, Ching-Chieh, T.A. Kumar, Santhosh, N. Talmadge, Joseph, M. Likin, Konstantin, T. Anderson, David, Hiroyuki, Yamaguchi, Hiromi, Takahashi, Katsumi, Ida, Mikiro, Yoshinuma, Exp. group, LHD
Publikováno v:
Proc. of 28th IAEA Fusion Energy Conference (FEC 2020).
The toroidal flow generation mechanism by electron cyclotron heating (ECH) in stellarator / heliotrons is clarified by comparing the LHD and HSX experiment results. Radial diffusion of energetic electrons by ECH produces a cancelling return current,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=jairo_______::a112a27ab95a33cc95169d9a259b8a5d
https://repo.qst.go.jp/records/85939
https://repo.qst.go.jp/records/85939
Autor:
Yuya Morishita, Ryosuke Seki, Sadayoshi Murakami, Masayuki Yokoyama, H. Nuga, Genta Ueno, Masaki Osakabe
Publikováno v:
Journal of Fusion Energy. 41
We develop a rapid simulation code for neutral beam injection (NBI) heating analysis, FIT3D-RC, to evaluate the power deposition in NBI-heated plasmas of the Large Helical Device (LHD). This code evaluates the beam ion birth profile using the Gaussia
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::38fbdf6cd3d24317c0ad21471806f68a
https://doi.org/10.1007/s10894-021-00313-5
https://doi.org/10.1007/s10894-021-00313-5
Autor:
Haiqing Liu, A. Higashijima, Nobuaki Yoshida, Sadayoshi Murakami, Akiyoshi Hatayama, Yasuhisa Oya, Kengoh Kuroda, Xiang Gao, T. Shikama, Yoshihiko Nagashima, S. Kawasaki, Hiroshi Idei, Yuichi Takase, Ryuya Ikezoe, Takahiro Nagata, Makoto Hasegawa, Makoto Oya, Shun Shimabukuro, Takumi Onchi, Kazuaki Hanada, Jinping Qian, Ikuji Takagi, Kazuo Nakamura
Publikováno v:
Nuclear Materials and Energy, Vol 27, Iss, Pp 101013-(2021)
QUEST (Q-shu university experiment with steady state spherical tokamak) is a midsize spherical tokamak capable of steady-state operation, comprising all-metal plasma-facing walls and a hot wall (HW) to address issues pertaining to fuel particle balan
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f249926638a7e0c1c8d13c0df7d6ded2
http://www.sciencedirect.com/science/article/pii/S2352179121000892
http://www.sciencedirect.com/science/article/pii/S2352179121000892
Autor:
Atsushi Fukuyama, Shin Kubo, Takahiro Nagata, Yuichi Takase, M. Sakaguchi, Hiroshi Idei, K. Mishra, Makoto Hasegawa, Akira Ejiri, Masaharu Fukuyama, M. Ono, Yoshihiko Nagashima, Satoru Kobayashi, A. Higashijima, Toru Ii Tsujimura, Shinichiro Kojima, Katsumasa Nakamura, Osamu Watanabe, Tsuyoshi Imai, Kengoh Kuroda, Naoki Matsumoto, Tsuyoshi Kariya, S. Shimabukoro, Takumi Onchi, Kazuaki Hanada, Miu Yunoki, Sadayoshi Murakami
Publikováno v:
Fusion Engineering and Design. 146:1149-1152
New polarizer and launcher systems on a 28-GHz electron-cyclotron (EC) heating and current drive (HCD) system have been developed for non-inductive second-harmonic EC-plasma-current ramp-up in the QUEST spherical tokamak. A launcher system with two q
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::09da8de6f5b2753da4ff9e470337fb7c
https://doi.org/10.1016/j.fusengdes.2019.02.027
https://doi.org/10.1016/j.fusengdes.2019.02.027
Autor:
Takahiro Nagata, Akiyoshi Hatayama, Haiqing Liu, Kengoh Kuroda, Hiroshi Idei, Kazuo Nakamura, M. Ono, S. Kawasaki, Yoshihiko Nagashima, Yuichi Takase, Nobuaki Yoshida, Makoto Hasegawa, Takumi Onchi, Sadayoshi Murakami, Roger Raman, Yasuhisa Oya, Kazuaki Hanada, Hideki Zushi, H. Long, Ikuji Takagi, A. Higashijima, T. Hirata, Taiichi Shikama, Makoto Oya, K. Okamoto, Z. Wang, Canbin Huang, Jinping Qian, Shun Shimabukuro, Xiang Gao
Publikováno v:
Nuclear Materials and Energy, Vol 19, Iss, Pp 544-549 (2019)
This research investigated fuel particle balance during long duration discharge in an all-metal plasma facing wall (PFW) through intensive QUEST execution. A simple wall model including the plasma-induced deposition layer that creates hydrogen (H) ba
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8a6943ecdd830314f91e8fac0105caf0
http://www.sciencedirect.com/science/article/pii/S2352179118302242
http://www.sciencedirect.com/science/article/pii/S2352179118302242
Autor:
Tsuyoshi Akiyama, Motoshi Goto, Tuomas Tala, Tokihiko Tokuzawa, Clive Michael, Hideaki Yamada, Haruhisa Nakano, Mamoru Shoji, Katsumi Ida, Toru Ii Tsujimura, Kenji Tanaka, Yasuo Yoshimura, Y. Ohtani, Sadayoshi Murakami, Suguru Masuzaki, Hiroto Takahashi, Felix Warmer, Shinsuke Satake, Y. Takemura, Hisamichi Funaba, Kiyofumi Mukai, L. N. Vacheslavov, Masaki Osakabe, Kenichi Nagaoka, Gen Motojima, Tomohiro Morisaki, Ryuichi Sakamoto, Motoki Nakata, Masayuki Yokoyama, S. Morita, Shin Kubo, Ryo Yasuhara, T. Kobayashi, Mikiro Yoshinuma, Toshiki Kinoshita, Ichihiro Yamada, Masanori Nunami, Hiroe Igami, Ryosuke Seki, T. Oishi, Takashi Shimozuma
Publikováno v:
Plasma Physics and Controlled Fusion
Tanaka, K, Nagaoka, K, Ida, K, Yamada, H, Kobayashi, T, Satake, S, Nakata, M, Kinoshita, T, Ohtani, Y, Tokuzawa, T, Takahashi, H, Warmer, F, Mukai, K, Murakami, S, Sakamoto, R, Nakano, H, Osakabe, M, Morisaki, T, Nunami, M, Tala, T, Tsujimura, T, Takemura, Y, Yokoyama, M, Seki, R, Igami, H, Yoshimura, Y, Kubo, S, Shimozuma, T, Akiyama, T, Yamada, I, Yasuhara, R, Funaba, H, Yoshinuma, M, Goto, M, Oishi, T, Morita, S, Motojima, G, Shoji, M, Masuzaki, S, Michael, C A & Vacheslavov, L N 2021, ' Isotope effects on transport in LHD ', Plasma Physics and Controlled Fusion, vol. 63, no. 9, 094001 . https://doi.org/10.1088/1361-6587/abffb6
K Tanaka et al 2021 Plasma Phys. Control. Fusion 63 094001
Tanaka, K, Nagaoka, K, Ida, K, Yamada, H, Kobayashi, T, Satake, S, Nakata, M, Kinoshita, T, Ohtani, Y, Tokuzawa, T, Takahashi, H, Warmer, F, Mukai, K, Murakami, S, Sakamoto, R, Nakano, H, Osakabe, M, Morisaki, T, Nunami, M, Tala, T, Tsujimura, T, Takemura, Y, Yokoyama, M, Seki, R, Igami, H, Yoshimura, Y, Kubo, S, Shimozuma, T, Akiyama, T, Yamada, I, Yasuhara, R, Funaba, H, Yoshinuma, M, Goto, M, Oishi, T, Morita, S, Motojima, G, Shoji, M, Masuzaki, S, Michael, C A & Vacheslavov, L N 2021, ' Isotope effects on transport in LHD ', Plasma Physics and Controlled Fusion, vol. 63, no. 9, 094001 . https://doi.org/10.1088/1361-6587/abffb6
K Tanaka et al 2021 Plasma Phys. Control. Fusion 63 094001
Isotope effects are one of the most important issues for predicting future reactor operations. Large helical device (LHD) is the presently working largest stellarator/helical device using super conducting helical coils. In LHD, deuterium experiments
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d40532fa0b84afc77a603bd1b7c9e885
https://hdl.handle.net/21.11116/0000-0008-FC96-321.11116/0000-0008-FC98-1
https://hdl.handle.net/21.11116/0000-0008-FC96-321.11116/0000-0008-FC98-1
Autor:
Yasuhiro, Yamamoto, Sadayoshi, Murakami, Ching-Chieh, Chang, T. A. Kumar, Santhosh, N. Talmadge, Joseph, M. Likin, Konstantin, T. Anderson, David
Publikováno v:
Nuclear Fusion. 62(6):064004
Spontaneous plasma flows have been observed in electron cyclotron heating (ECH) plasmas in the helically symmetric experiment. A smaller parallel flow was observed in the quasi-helically symmetric configuration compared with that observed in the Mirr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=jairo_______::745d6658fcaf54b0110d033dc306baa5
https://repo.qst.go.jp/records/86012
https://repo.qst.go.jp/records/86012
Autor:
Masaki Osakabe, Hiromi Takahashi, Hiroshi Yamada, Kenji Tanaka, Tatsuya Kobayashi, Katsumi Ida, Satoshi Ohdachi, Jacobo Varela, Kunihiro Ogawa, Masahiro Kobayashi, Katsuyoshi Tsumori, Katsunori Ikeda, Suguru Masuzaki, Masahiro Tanaka, Motoki Nakata, Sadayoshi Murakami, Shigeru Inagaki, Kiyofumi Mukai, Mizuki Sakamoto, Kazunobu Nagasaki, Yasuhiro Suzuki, Mitsutaka Isobe, Tomohiro Morisaki, the LHD Experiment Group
Publikováno v:
Nuclear Fusion. 62:042019
In recent deuterium experiments on the large helical device (LHD), we succeeded in expanding the temperature domain to higher regions for both electron and ion temperatures. Suppression of the energetic particle driven resistive interchange mode (EIC
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f64ef370996415eba3253d80f3119caa
https://doi.org/10.1088/1741-4326/ac3cda
https://doi.org/10.1088/1741-4326/ac3cda
Autor:
Masayoshi Nagata, Yuichi Takase, Naoto Tsujii, Hitoshi Tanaka, Sadayoshi Murakami, Kohei Yasuda, Takaaki Fujita, Yutaka Kamada, Shunji Tsuji-Iio, Hiroshi Kasahara, Takumi Onchi, Yasuhiko Takeiri, Kazuaki Hanada, Yasushi Todo, Masaki Uchida, Hiroshi Idei, Yasushi Ono, Akira Ejiri
Publikováno v:
Y. Takase et al 2022 Nucl. Fusion 62 042011
Spherical tokamak (ST) research in Japan has produced many innovative results: (i) plasma start-up to I p > 70 kA was achieved by electron cyclotron wave (ECW) with N ∥ = 0.75, while electron heating to T e > 500 eV was achieved with N ∥ = 0.26 o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::0140f150213e19050329221466e7153a
https://doi.org/10.1088/1741-4326/ac29cf
https://doi.org/10.1088/1741-4326/ac29cf