N
Naomichi Ezumi
Researcher at University of Tsukuba
Publications - 70
Citations - 880
Naomichi Ezumi is an academic researcher from University of Tsukuba. The author has contributed to research in topics: Divertor & Plasma. The author has an hindex of 13, co-authored 61 publications receiving 800 citations.
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Journal ArticleDOI
Static and dynamic behaviour of plasma detachment in the divertor simulator experiment NAGDIS-II
Noriyasu Ohno,Daisuke Nishijima,Shuichi Takamura,Yoshihiko Uesugi,M. Motoyama,N. Hattori,H. Arakawa,Naomichi Ezumi,Sergei Krasheninnikov,A. Pigarov,U. Wenzel +10 more
TL;DR: In this paper, the static and dynamic behavior of detached recombining plasmas in the linear divertor plasma simulator NAGDIS-II was investigated. But the results of the analysis were limited to a single tokamak diveror.
Journal ArticleDOI
Recent advances in the LHD experiment
O. Motojima,Nobuyoshi Ohyabu,A. Komori,Osamu Kaneko,Hiroshi Yamada,Kazuo Kawahata,Y. Nakamura,Katsumi Ida,Tsuyoshi Akiyama,N. Ashikawa,W. A. Cooper,Akira Ejiri,M. Emoto,Naomichi Ezumi,H. Funaba,Atsushi Fukuyama,P. R. Goncharov,Motoshi Goto,Hiroshi Idei,Katsunori Ikeda,Shigeru Inagaki,Mitsutaka Isobe,Shinichiro Kado,H. Kawazome,K. V. Khlopenkov,T. Kobuchi,Katsumi Kondo,A. Kostrioukov,Shin Kubo,Ryuhei Kumazawa,Yunfeng Liang,J. F. Lyon,Atsushi Mase,Suguru Masuzaki,T. Minami,J. Miyazawa,Tomohiro Morisaki,S. Morita,S. Murakami,Sadatsugu Muto,Takashi Mutoh,K. Nagaoka,Yoshio Nagayama,Noriyoshi Nakajima,Katsumasa Nakamura,Hideya Nakanishi,K. Narihara,Y. Narushima,K. Nishimura,Nobuhiro Nishino,N. Noda,Takashi Notake,H. Nozato,Satoshi Ohdachi,Yoshihide Oka,Hiroyuki Okada,S. Okamura,Masaki Osakabe,T. Ozaki,B.J. Peterson,Akio Sagara,T. Saida,K. Saito,Satoru Sakakibara,Mizuki Sakamoto,Ryuichi Sakamoto,Mamiko Sasao,Kuninori Sato,Masahide Sato,Tetsuo Seki,Takashi Shimozuma,Mamoru Shoji,Hajime Suzuki,Y. Takeiri,N. Takeuchi,Naoki Tamura,Kenji Tanaka,M. Y. Tanaka,Y. Teramachi,K. Toi,T. Tokuzawa,Y. Tomota,Yuki Torii,Katsuyoshi Tsumori,K.Y. Watanabe,T. Watari,Y. Xu,Ichihiro Yamada,S. Yamamoto,T. Yamamoto,Masayuki Yokoyama,Shinji Yoshimura,Yasuo Yoshimura,Mikiro Yoshinuma,Nobuyuki Asakura,Takaaki Fujita,T. Fukuda,Takaki Hatae,S. Higashijima,Akihiko Isayama,Yutaka Kamada,H. Kubo,Y. Kusama,Y. Miura,T. Nakano,H. Ninomiya,T Oikawa,Naoyuki Oyama,Yukio Sakamoto,K. Shinohara,T. Suzuki,Hidenobu Takenaga,Kenkichi Ushigusa,Tomoaki Hino,Makoto Ichimura,Yuichi Takase,Fumimichi Sano,Hideki Zushi,Takashi Satow,Shinsaku Imagawa,Toshiyuki Mito,I. Ohtake,T. Uda,Kimitaka Itoh,Kunizo Ohkubo,S. Sudo,K. Yamazaki,K. Matsuoka,Y. Hamada,Masami Fujiwara +129 more
TL;DR: In the first four years of the LHD experiment, several encouraging results have emerged, the most significant of which is that MHD stability and good transport are compatible in the inward shifted axis configuration as mentioned in this paper.
Journal ArticleDOI
Extension of the operational regime of the LHD towards a deuterium experiment
Yasuhiko Takeiri,Yasuhiko Takeiri,Tomohiro Morisaki,Tomohiro Morisaki,Masaki Osakabe,Masaki Osakabe,Masayuki Yokoyama,Masayuki Yokoyama,Satoru Sakakibara,Satoru Sakakibara,Hiroyuki R. Takahashi,Hiroyuki R. Takahashi,Yuji Nakamura,Yuji Nakamura,T. Oishi,T. Oishi,Gen Motojima,Gen Motojima,Sadayoshi Murakami,K. Ito,Akira Ejiri,Shinsaku Imagawa,Shinsaku Imagawa,Shigeru Inagaki,Mitsutaka Isobe,Mitsutaka Isobe,Shin Kubo,Sadao Masamune,Toshiyuki Mito,Toshiyuki Mito,Izumi Murakami,Izumi Murakami,K. Nagaoka,Kazunobu Nagasaki,K. Nishimura,Mizuki Sakamoto,Ryuichi Sakamoto,Ryuichi Sakamoto,Takashi Shimozuma,Kyosuke Shinohara,Hideo Sugama,Hideo Sugama,K.Y. Watanabe,Joon-Wook Ahn,Naofumi Akata,Naofumi Akata,Tsuyoshi Akiyama,Naoko Ashikawa,Naoko Ashikawa,J. Baldzuhn,T. Bando,E. Bernard,F. Castejón,Hirotaka Chikaraishi,M. Emoto,Todd Evans,Naomichi Ezumi,Keisuke Fujii,Hisamichi Funaba,Motoshi Goto,Motoshi Goto,Takuya Goto,Takuya Goto,D. Gradic,Y. Gunsu,Shinji Hamaguchi,Hiroki Hasegawa,Hiroki Hasegawa,Y. Hayashi,C. Hidalgo,Takeshi Higashiguchi,Yoshiki Hirooka,Yoshiki Hirooka,Yoshimitsu Hishinuma,Ritoku Horiuchi,Ritoku Horiuchi,Katsuji Ichiguchi,Katsuji Ichiguchi,Katsumi Ida,Katsumi Ida,Takeshi Ido,Hiroe Igami,Katsunori Ikeda,Seiji Ishiguro,Seiji Ishiguro,R. Ishizaki,Akihiro Ishizawa,Atsushi Ito,Atsushi Ito,Y. Ito,A. Iwamoto,Shuji Kamio,Kensaku Kamiya,Osamu Kaneko,Ryutaro Kanno,Ryutaro Kanno,Hiroshi Kasahara,Daiji Kato,Daiji Kato,T. Kato,Kazuo Kawahata,Gakushi Kawamura,Gakushi Kawamura,Masashi Kisaki,Sumio Kitajima,W.H. Ko,Makoto I. Kobayashi,Makoto I. Kobayashi,Shinji Kobayashi,T. Kobayashi,T. Kobayashi,Kazunori Koga,Akira Kohyama,Ryuhei Kumazawa,J.H. Lee,D. López-Bruna,Ryohei Makino,Suguru Masuzaki,Yutaka Matsumoto,Hiroto Matsuura,Osamu Mitarai,Osamu Mitarai,H. Miura,J. Miyazawa,J. Miyazawa,Naoki Mizuguchi,Chanho Moon,S. Morita,S. Morita,Toseo Moritaka,Kiyofumi Mukai,Kiyofumi Mukai,Takeo Muroga,Takeo Muroga,Sadatsugu Muto,Takashi Mutoh,Tetsuro Nagasaka,Tetsuro Nagasaka,Yoshio Nagayama,Yoshio Nagayama,Noriyoshi Nakajima,Hideya Nakanishi,Hideya Nakanishi,Haruhisa Nakano,Haruhisa Nakano,Motoki Nakata,Motoki Nakata,Yoshiro Narushima,Yoshiro Narushima,Daisuke Nishijima,Arata Nishimura,Seiya Nishimura,Takeo Nishitani,Masaki Nishiura,Yuji Nobuta,H. Noto,Masanori Nunami,Masanori Nunami,Tetsuhiro Obana,Tetsuhiro Obana,Kunihiro Ogawa,Kunihiro Ogawa,Satoshi Ohdachi,Satoshi Ohdachi,M. Ohno,Noriyasu Ohno,Hiroaki Ohtani,Hiroaki Ohtani,M. Okamoto,Yasuhisa Oya,T. Ozaki,Byron J. Peterson,Byron J. Peterson,M. Preynas,S. Sagara,S. Sagara,K. Saito,Hiroyuki A. Sakaue,Akio Sanpei,Shinsuke Satake,Shinsuke Satake,M. Sato,Takuya Saze,Takuya Saze,Oliver Schmitz,Ryosuke Seki,Ryosuke Seki,Tetsuo Seki,I. A. Sharov,Akihiro Shimizu,Masaharu Shiratani,Mamoru Shoji,C. Skinner,R. Soga,Torsten Stange,Chihiro Suzuki,Yasuhiro Suzuki,Yasuhiro Suzuki,Suguru Takada,Kazuya Takahata,Kazuya Takahata,Arimichi Takayama,Sadatsugu Takayama,Y. Takemura,Y. Takemura,Y. Takeuchi,Hitoshi Tamura,Naoki Tamura,Hirohiko Tanaka,Kenji Tanaka,M. Y. Tanaka,M. Y. Tanaka,Teruya Tanaka,Teruya Tanaka,Yasunori Tanaka,Shinichiro Toda,Yasushi Todo,Yasushi Todo,Kazuo Toi,Mieko Toida,Masayuki Tokitani,Masayuki Tokitani,Tokihiko Tokuzawa,Hayato Tsuchiya,Toru Ii Tsujimura,Katsuyoshi Tsumori,Katsuyoshi Tsumori,Shunsuke Usami,Shunsuke Usami,José Luis Velasco,Hao Wang,Tomo-Hiko Watanabe,Tsuguhiro Watanabe,Juro Yagi,Juro Yagi,Miyuki Yajima,Hiroshi Yamada,Hiroshi Yamada,Ichihiro Yamada,Osamu Yamagishi,N. Yamaguchi,Y. Yamamoto,Nagato Yanagi,Nagato Yanagi,Ryo Yasuhara,E. Yatsuka,Nobuaki Yoshida,Mikiro Yoshinuma,Mikiro Yoshinuma,Shinji Yoshimura,Yasuo Yoshimura +250 more
Journal ArticleDOI
Development of net-current free heliotron plasmas in the Large Helical Device
A. Komori,Hiroshi Yamada,Satoru Sakakibara,Osamu Kaneko,Kazuo Kawahata,Takashi Mutoh,Nobuyoshi Ohyabu,Shinsaku Imagawa,Katsumi Ida,Yoshio Nagayama,Takashi Shimozuma,K.Y. Watanabe,Toshiyuki Mito,Masahiro Kobayashi,K. Nagaoka,Ryuichi Sakamoto,N. Yoshida,Satoshi Ohdachi,Naoko Ashikawa,Y. Feng,T. Fukuda,Hiroe Igami,Shigeru Inagaki,Hiroshi Kasahara,Shin Kubo,Ryuhei Kumazawa,Osamu Mitarai,Sadayoshi Murakami,Yuji Nakamura,Masaki Nishiura,Tomoaki Hino,Suguru Masuzaki,Kenji Tanaka,Kazuo Toi,A. Weller,Mikiro Yoshinuma,Yoshiro Narushima,Noriyasu Ohno,Tetsuji Okamura,Naoki Tamura,K. Saito,Tetsuo Seki,Shigeru Sudo,Hirohiko Tanaka,Tokihiko Tokuzawa,Nagato Yanagi,Masayuki Yokoyama,Yasuo Yoshimura,Tsuyoshi Akiyama,Hirotaka Chikaraishi,Malay Bikas Chowdhuri,Masahiko Emoto,Naomichi Ezumi,Hisamichi Funaba,Luis Garcia,P. R. Goncharov,Motoshi Goto,Katsuji Ichiguchi,Makoto Ichimura,Hiroshi Idei,T. Ido,S. Iio,Katsunori Ikeda,M. Irie,Akihiko Isayama,T. Ishigooka,Mitsutaka Isobe,T. Ito,Kimitaka Itoh,Atsushi Iwamae,Shinji Hamaguchi,Takataro Hamajima,Sumio Kitajima,Shinichiro Kado,Daiji Kato,T. Kato,Shinji Kobayashi,Katsumi Kondo,Sadao Masamune,Yutaka Matsumoto,Noriaki Matsunami,Takashi Minami,Clive Michael,H. Miura,J. Miyazawa,Naoki Mizuguchi,Tomohiro Morisaki,S. Morita,Gen Motojima,Izumi Murakami,Sadatsugu Muto,Kazunobu Nagasaki,Noriyoshi Nakajima,Y. Nakamura,Hideya Nakanishi,Haruhisa Nakano,Kazumichi Narihara,Arata Nishimura,Hiroaki Nishimura,K. Nishimura,Seiya Nishimura,Nobuhiro Nishino,Takashi Notake,Tetsuhiro Obana,Kunihiro Ogawa,Yoshihide Oka,T. Ohishi,Hiroyuki Okada,Kenji Okuno,Kotaro Ono,Masaki Osakabe,T. Osako,T. Ozaki,Byron J. Peterson,Hiroyuki A. Sakaue,Mamiko Sasao,Shinsuke Satake,Kuninori Sato,M. Sato,Akihiro Shimizu,Masaharu Shiratani,Mamoru Shoji,Hideo Sugama,Chihiro Suzuki,Yasuhiro Suzuki,Kazuya Takahata,Hiroyuki Takahashi,Yuichi Takase,Yasuhiko Takeiri,Hidenobu Takenaga,Shinichiro Toda,Yasushi Todo,Masayuki Tokitani,Hayato Tsuchiya,Katsuyoshi Tsumori,Hajime Urano,E. V. Veshchev,F. Watanabe,Tomo-Hiko Watanabe,Tsuguhiro Watanabe,Ichihiro Yamada,S. Yamada,Osamu Yamagishi,Soichiro Yamaguchi,Shinji Yoshimura,Tomokazu Yoshinaga,Osamu Motojima +146 more
TL;DR: A review of the physical parameters of net-current free heliotron plasmas can be found in this paper, where the ion temperature has reached 5.2?keV at the density of 1.6? 1019?m?3, which is associated with the suppression of ion heat conduction loss.
Journal ArticleDOI
Extension of operation regimes and investigation of three-dimensional currentless plasmas in the Large Helical Device
Osamu Kaneko,Osamu Kaneko,Hiroshi Yamada,Hiroshi Yamada,Shigeru Inagaki,M. W. Jakubowski,Shin Kajita,Sumio Kitajima,Kobayashi,Kobayashi,Kazunori Koga,Tomohiro Morisaki,S. Morita,S. Morita,Takashi Mutoh,Takashi Mutoh,Satoru Sakakibara,Satoru Sakakibara,Yasuhiro Suzuki,Yasuhiro Suzuki,Hiroyuki Takahashi,Kenji Tanaka,Kazuo Toi,Yasuo Yoshimura,Tsuyoshi Akiyama,Y. Asahi,Naoko Ashikawa,Hirotaka Chikaraishi,Hirotaka Chikaraishi,A. W. Cooper,D. S. Darrow,Evgeny A. Drapiko,P. Drewelow,Xiaodi Du,Akira Ejiri,Masahiko Emoto,Todd Evans,Naomichi Ezumi,Keisuke Fujii,T. Fukuda,Hisamichi Funaba,Hisamichi Funaba,Masaru Furukawa,David Gates,Motoshi Goto,Motoshi Goto,Takuya Goto,W. Guttenfelder,Shinji Hamaguchi,Masahiro Hasuo,Tomoaki Hino,Y. Hirooka,Y. Hirooka,Katsuji Ichiguchi,Katsuji Ichiguchi,Katsumi Ida,Katsumi Ida,Hiroshi Idei,Takeshi Ido,Hiroe Igami,Katsunori Ikeda,Shinsaku Imagawa,Shinsaku Imagawa,Tsuyoshi Imai,Mitsutaka Isobe,Mitsutaka Isobe,Masafumi Itagaki,T. Ito,Kimitaka Itoh,Sanae I. Itoh,A. Iwamoto,Kensaku Kamiya,Tsuyoshi Kariya,Hiroshi Kasahara,Naohiro Kasuya,Daiji Kato,T. Kato,Kazuo Kawahata,Kazuo Kawahata,Fumihiro Koike,Shin Kubo,Ryuhei Kumazawa,Daisuke Kuwahara,Samuel Lazerson,H. Lee,Suguru Masuzaki,Suguru Masuzaki,S. Matsuoka,Hiroto Matsuura,Akinobu Matsuyama,Clive Michael,D. R. Mikkelsen,Osamu Mitarai,Toshiyuki Mito,Toshiyuki Mito,J. Miyazawa,J. Miyazawa,Gen Motojima,Kiyofumi Mukai,A. Murakami,Izumi Murakami,Izumi Murakami,Sadayoshi Murakami,Takeo Muroga,Takeo Muroga,Sadatsugu Muto,Sadatsugu Muto,K. Nagaoka,Kazunobu Nagasaki,Yoshio Nagayama,Yoshio Nagayama,Noriyoshi Nakajima,Noriyoshi Nakajima,Hiroaki Nakamura,Y. Nakamura,Y. Nakamura,Hideya Nakanishi,Hideya Nakanishi,Haruhisa Nakano,T. Nakano,Kazumichi Narihara,Yoshiro Narushima,Yoshiro Narushima,K. Nishimura,Seiya Nishimura,Masaki Nishiura,Y. M. Nunami,Y. M. Nunami,Tetsuhiro Obana,Kunihiro Ogawa,Satoshi Ohdachi,Satoshi Ohdachi,Noriyasu Ohno,Nobuyoshi Ohyabu,T. Oishi,M. Okamoto,Atsushi Okamoto,Masaki Osakabe,Yasuhisa Oya,T. Ozaki,N. A. Pablant,Byron J. Peterson,Byron J. Peterson,Akio Sagara,Akio Sagara,K. Saito,Ryuichi Sakamoto,Ryuichi Sakamoto,Hiroyuki A. Sakaue,Mamiko Sasao,Kuninori Sato,M. Sato,Keiji Sawada,Ryosuke Seki,Tetsuo Seki,V.Y. Sergeev,S. E. Sharapov,I. A. Sharov,Akihiro Shimizu,Takashi Shimozuma,Masaharu Shiratani,Mamoru Shoji,Shigeru Sudo,Shigeru Sudo,Hideo Sugama,Hideo Sugama,Chihiro Suzuki,Kazuya Takahata,Kazuya Takahata,Yasuhiko Takeiri,Yasuhiko Takeiri,Y. Takemura,M. Takeuchi,Hitoshi Tamura,Naoki Tamura,Hirohiko Tanaka,Teruya Tanaka,Teruya Tanaka,M. Tingfeng,Yasushi Todo,Yasushi Todo,Masayuki Tokitani,Masayuki Tokitani,Kazutoshi Tokunaga,Tokihiko Tokuzawa,Hayato Tsuchiya,Katsuyoshi Tsumori,Yoshio Ueda,Leonid Vyacheslavov,K.Y. Watanabe,K.Y. Watanabe,Tomo-Hiko Watanabe,Tsuguhiro Watanabe,Tsuguhiro Watanabe,B. Wieland,Ichihiro Yamada,S. Yamada,Shoji Yamamoto,Nagato Yanagi,Nagato Yanagi,Ryo Yasuhara,Masayuki Yokoyama,Masayuki Yokoyama,Nobuaki Yoshida,Shinji Yoshimura,Tomokazu Yoshinaga,Mikiro Yoshinuma,Mikiro Yoshinuma,A. Komori,A. Komori +209 more
TL;DR: In this article, the authors reported the progress of physical understanding as well as parameter improvement of net-current-free helical plasma for the Large Helical Device since the last Fusion Energy Conference in Daejeon in 2010, and focused on the optimization of plasma edge conditions to extend the operation regime towards higher ion temperature and more stable high density and high beta.