Internal disruptions in Heliotron E
Internal disruptions in Heliotron E
复制标题
Heliotron E 的内部中断
DOI：
10.1063/1.872980
复制
发表时间：
1998
影响因子：
2.2
通讯作者：
M. Wakatani
中科院分区：
文献类型：
--
作者：
B. Carreras;V. Lynch;H. Zushi;K. Ichiguchi;M. Wakatani
在 Heliotron E 中 [K.哦，核。 Fusion 25, 1243 (1985)] 移入真空磁场配置，q 分布从磁轴处的略高于 2 到等离子体边缘处的 0.4 变化。对于低β等离子体，电阻交换模式是等离子体核心处主要的低n不稳定性。它们在低波动水平下饱和。高于阈值时，理想的 m/n=2/1 模式变得不稳定。它们可以是谐振模式或非谐振模式，具体取决于 q(0) 的值。无论哪种情况，它们的非线性演化都会导致 r/a=0.3 半径内的压力突然崩溃（锯齿振荡）。当β进一步增加时，q=2表面移出等离子体，当q(0)<1.85时，理想的m/n=2/1模式得到有效稳定。结果，锯齿振荡被抑制。
In Heliotron E [K. Uo, Nucl. Fusion 25, 1243 (1985)] shifted-in vacuum magnetic field configuration, the q profile varies from just above 2 at the magnetic axis to 0.4 at the plasma edge. For low-β plasmas, resistive interchange modes are the dominant low-n instabilities at the plasma core. They saturate at low fluctuation levels. Above a threshold value, the ideal m/n=2/1 modes become unstable. They can be resonant or nonresonant modes depending on the value of q(0). In either case, their nonlinear evolution leads to a sudden crash of the pressure within the r/a=0.3 radius (sawtooth oscillation). When beta is increased further, the q=2 surface moves out of the plasma, and the ideal m/n=2/1 modes are effectively stabilized when q(0)<1.85. As a result, the sawtooth oscillations are suppressed.
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