Zobrazeno 1 - 10
of 315
pro vyhledávání: '"Yuichi TAKASE"'
Publikováno v:
Plasma, Vol 5, Iss 2, Pp 247-257 (2022)
Traditionally, spherical tokamak (ST) reactors are considered to operate in a steady state. This paper analyses the advantages of a pulsed ST reactor. The methodology developed for conventional tokamak (CT) reactors is used and it is shown that advan
Externí odkaz:
https://doaj.org/article/e412d63c00c14357a0f02ce63be2a6c2
Autor:
Hibiki Yamazaki, Naoto Tsujii, James H.P. Rice, Yuki Aoi, Yongtae Ko, Yi Peng, Kyohei Matsuzaki, Yuki Osawa, Osamu Watanabe, Yuichi Takase, Akira Ejiri, Kotaro Iwasaki
No description supplied
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::c1bcfeefbf68846302d3ae5d13a260a2
Autor:
Naoto Tsujii1 tsujii@k.u-tokyo.ac.jp, Yuichi Takase1, Akira Ejiri1, Takahiro Shinya2, Satoru Yajima1, Hibiki Yamazaki1, Hiro Togashi1, Moeller, Charles P.3, Roidl, Benedikt1, Wataru Takahashi1, Kazuya Toida1, Yusuke Yoshida1
Publikováno v:
EPJ Web of Conferences. 11/29/2017, Vol. 157, p1-7. 7p.
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
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
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
Autor:
Akira EJIRI, Hibiki YAMAZAKI, Yuichi TAKASE, Naoto TSUJII, Osamu WATANABE, Yi PENG, Kotaro IWASAKI, Yuki AOI, Yongtae KO, Kyohei MATSUZAKI, James H.P. RICE, Yuki OSAWA, Charles P. MOELLER, Yasuo YOSHIMURA, Hiroshi KASAHARA, Kenji SAITO, Tetsuo SEKI, Shuji KAMIO
Publikováno v:
Plasma and Fusion Research. 17:1402037-1402037
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
Autor:
Yusuke Yoshida, Takahiro Shinya, Akira Ejiri, Yuichi Takase, Naoto Tsujii, S. Yajima, Yasushi Todo, B. Roidl
Publikováno v:
Benedikt Roidl, Yasushi Todo, Yuichi Takase, Naoto Tsujii, Akira Ejiri, Yusuke Yoshida, Satoru Yajima, Takahiro Shinya, A simulation environment to simulate lower-hybrid-wave-driven plasmas efficiently, Computer Physics Communications, Volume 230, 2018, Pages 38-49
In this study a hybrid simulation environment to investigate the lower-hybrid-wave-driven tokamak plasmas is presented, and its application to the spherical tokamak TST-2 is described. These plasma are formed and driven by radio-frequency waves witho
Autor:
Kotaro Iwasaki, Yi Peng, Osamu Watanabe, Akira Ejiri, Yongtae Ko, Hibiki Yamazaki, Charles P. Moeller, Yuichi Takase, Yuki Aoi, Kyohei Matsuzaki, James H.P. Rice, Yuki Osawa, Yasuo Yoshimura, Naoto Tsujii
Publikováno v:
Nuclear Fusion. 61:116047
Presence of a large population of fast particles may qualitatively modify the tokamak equilibrium from the one that can be described by the standard magneto-hydrodynamics (MHD). The kinetic modification of the MHD equilibrium was studied for a lower-