MHD characteristics in the high beta regime of the Large Helical Device

被引：38

作者：

Sakakibara, S ^{[1
]}

Yamada, H

Watanabe, K

Narushima, Y

Toi, K

Ohdachi, S

Takechi, M

Yamamoto, S

Narihara, K

Tanaka, K

Ashikawa, N

De Vries, P

Emoto, M

Funaba, H

Goto, M

Ida, K

Idei, H

Ikeda, K

Inagaki, S

Inoue, N

Isobe, T

Kado, S

Kaneko, O

Kawahata, K

Khlopenkov, K

Kobuchi, T

Komori, A

Kubo, S

Kumazawa, R

Liang, Y

Masuzaki, S

Minami, T

Miyazawa, J

Morisaki, T

Morita, S

Murakami, S

Muto, S

Mutol, T

Nagayama, Y

Nakamura, Y

Nakanishi, H

Nishimura, K

Noda, N

Notake, T

Ohyabu, N

Oka, Y

Osakabe, M

Ozaki, T

Pavlichenko, RO

Peterson, BJ

机构：

[1] Nagoya Univ, Dept Energy Engn & Sci, Nagoya, Aichi, Japan

[2] Grad Univ Adv Studies, Dept Fus Sci, Hayama, Japan

[3] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[4] Ecole Polytech Fed Lausanne, Ctr Rech Phys Plasmas, Lausanne, Switzerland

来源：

NUCLEAR FUSION | 2001年 / 41卷 / 09期

关键词：

D O I：

10.1088/0029-5515/41/9/306

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 highest volume averaged beta values beta (t) of 2.2% at B-t = 0.75 T (gas puff) and 2.4% at D-t = 1.3 T (pellet) in helical devices have been achieved in LHD. The beta (t) dependence of MHD activities has been investigated in NBI plasmas. The n/m = 1/2 mode, excited in the core region, and the t = 1 resonant modes, in the peripheral region, have been observed. Both of the fluctuation amplitudes increase with beta (t) and pressure gradient. The strong n/m = 1/2 mode, which affects the plasma profile., has been observed in high beta (t) discharges, and the abrupt disappearance of the mode leads to restoration of the T-e profile. Violent instabilities which terminate the plasma and degradation of global energy confinement have not been observed so far.

引用

页码：1177 / 1183

页数：7

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