Long-pulse plasma discharge on the Large Helical Device

A long-pulse plasma discharge of more than 30 min duration was achieved on the Large Helical Device (LHD). A plasma of ne = 0.8 × 1019 m−3 and Ti0 = 2.0 keV was sustained with PICH = 0.52 MW, PECH = 0.1 MW and averaged PNBI = 0.067 MW. The total injected heating energy was 1.3 GJ. One of the keys to the success of the experiment was a dispersion of the local plasma heat load to divertors, accomplished by sweeping the magnetic axis inward and outward. Causes limiting the long pulse plasma discharge are discussed. An ion impurity penetration limited further long-pulse discharge in the 8th experimental campaign (2004).

Masaki Osakabe | Takashi Shimozuma | Osamu Motojima | H. Chikaraishi | N. Ohyabu | Hiroshi Yamada | Osamu Kaneko | Shigeru Morita | Fujio Shimpo | Tokihiko Tokuzawa | H. Ogawa | Y. Takeiri | Takashi Mutoh | Ryuhei Kumazawa | Yuichi Takase | J. G. Kwak | Shin Kubo | Yoshio Nagayama | Motoshi Goto | Yanping Zhao | Hiroe Igami | Kazuo Kawahata | Naoko Ashikawa | Suguru Masuzaki | J. Miyazawa | K. Narihara | T. Notake | Y. Oka | S. Sudo | K. Ida | Mitsuo Shoji | H. Funaba | Akio Komori | Kenji Saito | Tetsuo Seki | Goro Nomura | Mitsuhiro Yokota | Tomohiro Morisaki | Katsuyoshi Tsumori | T. Watari | Kiyohiko Nishimura | Yuji Nakamura | K. Ohkubo | K. N. Sato | C. Takahashi | H. Yamada | K. Kawahata | H. Chikaraishi | H. Igami | T. Morisaki | O. Motojima | N. Ohyabu | T. Mutoh | R. Kumazawa | S. Masuzaki | J. Miyazawa | B. Peterson | N. Ashikawa | T. Tokuzawa | K. Narihara | A. Komori | Y. Takase | H. Ogawa | J. S. Yoon | H. Funaba | O. Kaneko | N. Noda | Y. Oka | M. Osakabe | T. Seki | Y. Takeiri | K. Tsumori | T. Watari | C. Takahashi | K. Ohkubo | S. Sudo | Y. Yoshimura | T. Notake | K. Ida | Byron J. Peterson | Makoto Ichimura | Tomo-Hiko Watanabe | Kenichi Nagaoka | Y. Yoshimura | N. Noda | M. Goto | K. Ikeda | N. Takeuchi | Y. Zhao | K. Ikeda | S. Kubo | Yuki Torii | N. Takeuchi | A. Kato | Masahiro Kobayashi | F. Shimpo | G. Nomura | Masanori Sakamoto | K. Nagaoka | S. Morita | Y. Torii | J. Yoon | Y. Nagayama | M. Sakamoto | A. Kato | M. Shoji | M. Kobayashi | Y. Nakamura | J. Kwak | T. Shimozuma | K. Saito | K. Sato | K. Nishimura | T. Watanabe | M. Ichimura | M. Yokota

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