Initial physics achievements of large helical device experiments

被引：173

作者：

Motojima, O ^{[1
]}

Yamada, H ^{[1
]}

Komori, A ^{[1
]}

Ohyabu, N ^{[1
]}

Kawahata, K ^{[1
]}

Kaneko, O ^{[1
]}

Masuzaki, S ^{[1
]}

Ejiri, A ^{[1
]}

Emoto, M ^{[1
]}

Funaba, H ^{[1
]}

Goto, M ^{[1
]}

Ida, K ^{[1
]}

Idei, H ^{[1
]}

Inagaki, S ^{[1
]}

Inoue, N ^{[1
]}

Kado, S ^{[1
]}

Kubo, S ^{[1
]}

Kumazawa, R ^{[1
]}

Minami, T ^{[1
]}

Miyazawa, J ^{[1
]}

Morisaki, T ^{[1
]}

Morita, S ^{[1
]}

Murakami, S ^{[1
]}

Muto, S ^{[1
]}

Mutoh, T ^{[1
]}

Nagayama, Y ^{[1
]}

Nakamura, Y ^{[1
]}

Nakanishi, H ^{[1
]}

Narihara, K ^{[1
]}

Nishimura, K ^{[1
]}

Noda, N ^{[1
]}

Kobuchi, T ^{[1
]}

Ohdachi, S ^{[1
]}

Oka, Y ^{[1
]}

Osakabe, M ^{[1
]}

Ozaki, T ^{[1
]}

Peterson, BJ ^{[1
]}

Sagara, A ^{[1
]}

Sakakibara, S ^{[1
]}

Sakamoto, R ^{[1
]}

Sasao, H ^{[1
]}

Sasao, M ^{[1
]}

Sato, K ^{[1
]}

Sato, M ^{[1
]}

Seki, T ^{[1
]}

Shimozuma, T ^{[1
]}

Shoji, M ^{[1
]}

Suzuki, H ^{[1
]}

Takeiri, Y ^{[1
]}

Tanaka, K ^{[1
]}

机构：

[1] Natl Inst Fus Sci, Toki, Gifu 5078292, Japan

来源：

PHYSICS OF PLASMAS | 1999年 / 6卷 / 05期

关键词：

D O I：

10.1063/1.873443

中图分类号：

O35 [流体力学]; O53 [等离子体物理学];

学科分类号：

070204 ; 080103 ; 080704 ;

摘要：

The Large Helical Device (LHD) experiments [O. Motojima, et al., Proceedings, 16th Conference on Fusion Energy, Montreal, 1996 (International Atomic Energy Agency, Vienna, 1997), Vol. 3, p. 437] have started this year after a successful eight-year construction and test period of the fully superconducting facility. LHD investigates a variety of physics issues on large scale heliotron plasmas (R = 3.9 m, a = 0.6 m), which stimulates efforts to explore currentless and disruption-free steady plasmas under an optimized configuration. A magnetic field mapping has demonstrated the nested and healthy structure of magnetic surfaces, which indicates the successful completion of the physical design and the effectiveness of engineering quality control during the fabrication. Heating by 3 MW of neutral beam injection (NBI) has produced plasmas with a fusion triple product of 8 x 10(18) keV m(-3) s at a magnetic field of 1.5 T. An electron temperature of 1.5 keV and an ion temperature of 1.4 keV have been achieved. The maximum stored energy has reached 0.22 MJ, which corresponds to [beta] = 0.7%, with neither unexpected confinement deterioration nor visible magnetohydrodynamics (MHD) instabilities. Energy confinement times, reaching 0.17 s at the maximum, have shown a trend similar to the present scaling law derived from the existing medium sized helical devices, but enhanced by 50%. The knowledge on transport, MHD, divertor, and long pulse operation, etc., are now rapidly increasing, which implies the successful progress of physics experiments on helical currentless-toroidal plasmas. (C) 1999 American Institute of Physics. [S1070-664X(99)90605-5].

引用

页码：1843 / 1850

页数：8

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