Characteristics of sawtooth oscillations observed in the compact helical system
Characteristics of sawtooth oscillations observed in the compact helical system
复制标题
紧凑螺旋系统中观察到的锯齿振荡特征
DOI:
10.1063/1.1687420
复制
发表时间:
2004
影响因子:
2.2
通讯作者:
Y. Yoshimura
中科院分区:
文献类型:
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作者:
S. Takagi;K. Toi;M. Takechi;S. Murakami;Koshi Tanaka;S. Nishimura;M. Isobe;K. Matsuoka;T. Minami;S. Okamura;M. Osakabe;C. Takahashi;Y. Yoshimura
Sawtooth oscillations are often detected in the signals of several diagnostics during tangential neutral beam injection (NBI) heating in the compact helical system (CHS) [K. Matsuoka et al., Plasma Pysics and Controlled Nuclear Fusion Research, 1988 (International Atomic Energy Agency, Vienna, 1989), Vol. 2, p. 441]. The sawtooth crashes are closely related to the q=2 (q is the safety factor) rational surface located on the normalized minor radius ρ∼0.5 and most of the crashes indicate a character of an annular crash. The disturbance of plasma parameters on the magnetic axis depends on the toroidal plasma beta and the size of the q=2 surface. The time scale of the crash is fairly large to be 0.5–1.0 ms which is an order of magnitude larger than that in tokamaks. Two types of m/n=2/1 (m and n are poloidal and toroidal mode numbers, respectively) magnetic fluctuations, which are fishbone-like burst mode (FB) and low frequency ideal/resistive interchange mode (LF mode), grow just before the crash. Those inte...
影响因子:
3.3
作者:
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
通讯作者:
A. Gibson;T. Sekiguchi;K. Lackner;S. Bodner;R. Hancox
DOI:
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发表时间:
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影响因子:
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