Overview of the Large Helical Device
| Autor: | Hiroshi Idei, K. Yamazaki, Hisamichi Funaba, Hiroshi Yamada, Kunizo Ohkubo, S. Yamamoto, K.Y. Watanabe, Katsuyoshi Tsumori, Naoko Ashikawa, Byron J. Peterson, Shigeru Inagaki, Kazuo Toi, Tetsuo Seki, S. Murakami, M. Fujiwara, Satoshi Ohdachi, Kazuo Kawahata, Tomo-Hiko Watanabe, Hajime Suzuki, Masayuki Yokoyama, Yoshio Nagayama, Ryuichi Sakamoto, Ichihiro Yamada, Kimitaka Itoh, Tokihiko Tokuzawa, Takashi Mutoh, T. Watari, S. Tanahashi, Takashi Shimozuma, Osamu Kaneko, N. Inoue, I. Ohtake, Shinichiro Kado, Sadatsugu Muto, K. Murai, Kazumichi Narihara, Yasuji Hamada, Mamiko Sasao, M. Takechi, Suguru Masuzaki, Kenji Tanaka, K. Saito, Soichiro Yamaguchi, Sadao Satoh, S. Morita, Satoru Sakakibara, Mamoru Shoji, Katsumi Ida, Akio Sagara, Masaki Osakabe, Tomohiro Morisaki, Masao Okamoto, Shigeru Sudo, Akio Komori, Mitsutaka Isobe, Ryuhei Kumazawa, Yasuo Yoshimura, Katsunori Ikeda, M. Sato, Takashi Satow, Hideya Nakanishi, Masahiko Emoto, P. deVries, Keisuke Matsuoka, Takashi Minami, Y. Nakamura, T. Kobuchi, Yoshihide Oka, N. Noda, H. Sasao, Shin Kubo, J. Miyazawa, Osamu Motojima, Nobuyoshi Ohyabu, Yasuhiko Takeiri, K. Nishimura, Motoshi Goto, Kuninori Sato, T. Ozaki |
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| Rok vydání: | 2000 |
| Předmět: | |
| Zdroj: | Plasma Physics and Controlled Fusion. 42:1165-1177 |
| ISSN: | 1361-6587 0741-3335 |
| DOI: | 10.1088/0741-3335/42/11/303 |
| Popis: | The Large Helical Device (LHD) experiments have started after a construction period of eight years, and two experimental campaigns were performed in 1998. The magnetic field was raised up to 2.75 T at a magnetic axis position of 3.6 m at the end of the second campaign. In the third campaign, started in July in 1999, the plasma production with ECH of 0.9 MW and auxiliary heating with NBI of 3.5 MW have achieved an electron temperature of 3.5 keV and an ion temperature of 2.4 keV. The maximum stored energy has reached 0.75 MJ with an averaged electron density of 7.7×1019 m-3 by hydrogen pellet injection. The ICRF heating has sustained the plasma for longer than 2 s and the initial stored energy of the NBI target plasma has increased from 0.27 MJ to 0.335 MJ. The major characteristic of the LHD plasma is the formation of the temperature pedestal, which leads to some enhancement of energy confinement over the ISS95 scaling law. The confinement characteristic is gyro-Bohm and the maximum energy confinement has reached 0.28 s. The LHD has also shown its high potentiality for steady-state operation by realizing a 22 s discharge in the second campaign. |
| Databáze: | OpenAIRE |
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