Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Masahiko Nakasuga"'
Autor:
Tohru Mizuuchi, Fumimichi Sano, Kinzo Sakamoto, Tokuhiro Obiki, Masahiko Nakasuga, Kazunobu Nagasaki, Shinji Kobayashi, Victor Tribaldos, H. Shidara, Yuji Nakamura, Hiroyuki Okada, Katsumi Kondo
Publikováno v:
Journal of Plasma and Fusion Research. 81:48-56
Power absorption profiles of electron cyclotron resonance heating (ECRH) are calculated for a helical-axis heliotron device, Heliotron J, by a ray tracing code, TRECE. The three-dimensional structure of flux surfaces and magnetic field is considered
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::78354a89ffc7b1d3213564c5d4da4e59
https://doi.org/10.1585/jspf.81.48
https://doi.org/10.1585/jspf.81.48
Autor:
T. Takamiya, S. Nakazawa, Y. Morita, Hiroyuki Okada, Masahiko Nakasuga, Keisuke Ohashi, Katsumi Kondo, H. Shidara, H. Kawazome, Y. Fukagawa, K. Takahashi, K. Yaguchi, Yuji Nakamura, Y. Ijiri, Yasuhiro Suzuki, K. Tohshi, T. Senju, S. Nishio, Tohru Mizuuchi, Kiyoshi Hanatani, Y. Ohno, Hidetoshi Yukimoto, Tokuhiro Obiki, M. Shibano, K. Sakamoto, Kazunobu Nagasaki, Y. Nishioka, Satoshi Yamamoto, Shinji Kobayashi, S Tuboi, M. Kaneko, Fumimichi Sano, Masaki Yamada, Y. Manabe
Publikováno v:
Plasma Science and Technology. 6:2371-2376
Spontaneous transition of the plasma confinement mode was observed in the helical-axis heliotron device Heliotron J for three different plasma heating schemes, i.e. ECH-only, NBI-only and the combination of ECH and NBI. The transition seems to occur
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cb77009eb316c96837de4448c82df86
https://doi.org/10.1088/1009-0630/6/4/005
https://doi.org/10.1088/1009-0630/6/4/005
Autor:
Victor Tribaldos, Y. Ijiri, Masahiro Wakatani, S. Nishio, M. Shibano, S. Tsuboi, Yasuhiro Suzuki, T. Senju, Y. Fukagawa, K. Yaguchi, Kiyoshi Hanatani, M. Kaneko, H. Shidara, Hidetoshi Yukimoto, S. Nakazawa, Kazunobu Nagasaki, Kinzo Sakamoto, Y. Ohno, Shinji Kobayashi, Yuji Nakamura, Tohru Mizuuchi, Masahiko Nakasuga, Tokuhiro Obiki, Masaki Yamada, Sakae Besshou, K. Takahashi, Hayato Kawazome, T. Takamiya, Y. Nishioka, Keisuke Ohashi, K. Toshi, Katsumi Kondo, Hiroyuki Okada, Y. Manabe, Fumimichi Sano, Shigeru Konoshima
Publikováno v:
Journal of Plasma and Fusion Research. 80:883-888
The plasma confinement properties of Heliotron J plasmas and the toroidal current are investigated. A plasma energy of 2.5 kJ has been achieved by 70 GHz‐0.35 MW electron cyclotron heating (ECH). The energy confinement time is within the expected v
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2a136555dc1d205c5559020993b66cf5
https://doi.org/10.1585/jspf.80.883
https://doi.org/10.1585/jspf.80.883
Autor:
Y. Ijiri, Y. Nishioka, Yuji Nakamura, Hiroyasu Kubo, S. Kaneko, Y. Morita, Masahiro Wakatani, H. Kawazome, S. Tsuboi, K. Sakamoto, M. Iriguchi, Hiroyuki Okada, K. Takahashi, T. Takamiya, Kiyoshi Hanatani, H. Tsuru, Y. Ohno, Sakae Besshou, K. Yaguchi, Tokuhiro Obiki, K. Tomiyama, W.L. Ang, Hidetoshi Yukimoto, M. Takeda, S. Nishio, Nobuhiro Nishino, Francisco L. Tabarés, Kazunobu Nagasaki, S. Maeno, M. Shibano, T. Mizuuchi, Y. Fukagawa, Masaki Yamada, Shinji Kobayashi, Masahiko Nakasuga, K. Tohshi, Katsumi Kondo, H. Shidara, S. Nakazawa, T. Senju, Y. Manabe, Fumimichi Sano, Victor Tribaldos
Publikováno v:
Nuclear Fusion. 44:47-55
Studies of global energy confinement and toroidal plasma current behaviour for the second harmonic 70 GHz ECH at B = 1–1.5 T are described with emphasis on the magnetic configuration effects in the helical-axis heliotron 'Heliotron J'. At low densi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::52f3f260ff0d586c6d317704b235312a
https://doi.org/10.1088/0029-5515/44/1/005
https://doi.org/10.1088/0029-5515/44/1/005
Autor:
V.V. Chechkin, Sakae Besshou, Suguru Masuzaki, T. Mizuuchi, Hiroyuki Okada, Kazunobu Nagasaki, V. S. Voitsenya, Fumimichi Sano, Tokuhiro Obiki, L. E. Sorokovoj, O. Motojima, Masahiko Nakasuga, Katsumi Kondo
Publikováno v:
Journal of Nuclear Materials. :1234-1238
The big asymmetry of divertor flows to symmetrically located collectors was observed when divertor plasma flow distributions (DPFD) were measured in Heliotron-E device. Several possible reasons of DPF asymmetry were discussed in previous publications
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::2693b45286aa3a04552089f0ca415307
https://doi.org/10.1016/s0022-3115(02)01524-6
https://doi.org/10.1016/s0022-3115(02)01524-6
Autor:
Fumimichi Sano, Shoichi Okamura, Masami Fujiwara, Hiroyuki Okada, Keisuke Matsuoka, Yuji Nakamura, Sakae Besshou, Osamu Motojima, Tohru Mizuuchi, Nobuyoshi Ohyabu, Masahiko Nakasuga, Kazunobu Nagasaki, Kiyoshi Hanatani, Masahiro Wakatani, Tokuhiro Obiki, Katsumi Kondo
Publikováno v:
Scopus-Elsevier
Experimental results are summarized for major helical devices in Japan: Large Helical Device (LHD), Compact Helical System (CHS), and Heliotron J. The LHD and CHS have planar magnetic axes, while Heliotron J has a nonplanar magnetic axis.The LHD, the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::47e05771e0de3aa3a582323dcead24bd
https://doi.org/10.13182/fst02-a211
https://doi.org/10.13182/fst02-a211
Publikováno v:
Journal of Vacuum Science & Technology A: Vacuum, Surfaces, and Films. 20:848-856
To simulate hydrogen outgassing in an ultrahigh vacuum (UHV) chamber and a fusion device, an outgassing theory based on the recombination limited model is presented, where the time evolution of hydrogen concentration in the wall of the vacuum chamber
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7f85b5f301251a8c4e618385c4082714
https://doi.org/10.1116/1.1471354
https://doi.org/10.1116/1.1471354
Autor:
Masahiko Nakasuga, K. Kondo, F. Sano, Kazunobu Nagasaki, Hiroyuki Okada, O. Motojima, V.V. Chechkin, Sakae Besshou, Suguru Masuzaki, L. E. Sorokovoj, V. S. Voitsenya, Tokuhiro Obiki, T. Mizuuchi
Publikováno v:
Plasma Devices and Operations. 10:227-249
A comprehensive study of the divertor plasma flow (DPF) distribution in the Heliotron-E helical device has been carried out by means of collector arrays under various experimental conditions. A strong inhomogeneity of DPF distribution is observed in
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::faad35e0c33aaa7f0ae29757bea31ae8
https://doi.org/10.1080/1051999021000106619
https://doi.org/10.1080/1051999021000106619
Autor:
Y. Ikeda, K. Toshi, T. Kobayashi, Y. Ijiri, Sakae Besshou, M. Takeda, Y. Liu, Hiroyuki Okada, W.L. Ang, Kiyoshi Hanatani, Yuji Nakamura, K. Yaguchi, K. Tomiyama, Osamu Yamagishi, K. Sakamoto, K. Kondo, T. Mizuuchi, M. Shibano, Masahiko Nakasuga, T. Takamiya, T. Senju, Y. Kawazome, Tokuhiro Obiki, Masahiro Wakatani, Kazunobu Nagasaki, T. Hamada, Fumimichi Sano, H. Shidara, Y. Manabe, K. Aizawa, S. Maeno
Publikováno v:
Nuclear Fusion. 41:833-844
Results obtained in the initial experimental phase of Heliotron J are reported. Electron beam mapping of the magnetic surfaces at a reduced DC magnetic field has revealed that the observed surfaces are in basic agreement with the ones calculated on t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::3cd57adcda73ee8cd562e0be922f6a53
https://doi.org/10.1088/0029-5515/41/7/305
https://doi.org/10.1088/0029-5515/41/7/305
Autor:
Hiroyuki Okada, Masahiko Nakasuga, K. Kondo, Tohru Mizuuchi, Yuji Nakamura, Kazunobu Nagasaki, Tokuhiro Obiki, Fumimichi Sano
Publikováno v:
Journal of Nuclear Materials. :678-682
A new configuration with ι /2 π ∼ 0.5 is proposed as an island divertor configuration in Heliotron J, a small size l =1/ M =4 helical-axis heliotron device. In this case, both the m =8/ n =4 edge islands and the last closed flux surface can keep
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a4755acbf8db9e4fd661ca9e87effb35
https://doi.org/10.1016/s0022-3115(00)00596-1
https://doi.org/10.1016/s0022-3115(00)00596-1