Stability of resistive and ideal ballooning modes in the Texas Experimental Tokamak and DIII‐D
Stability of resistive and ideal ballooning modes in the Texas Experimental Tokamak and DIII‐D
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DOI：
10.1063/1.860038
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发表时间：
1992-07
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影响因子：
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通讯作者：
D. McCarthy;P. Guzdar;J. Drake;T. Antonsen;A. Hassam
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文献类型：
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作者：
D. McCarthy;P. Guzdar;J. Drake;T. Antonsen;A. Hassam
利用包含电子温度和磁波动的简化Braginskii方程检验了漂移电阻气胀模式的稳定性。德克萨斯实验托卡马克（TEXT）[物理学。发现边缘等离子体在很宽的模数范围内是不稳定的。对于低模式数（m<70），等离子体不稳定到漂移电阻气球模式，其增长率与电阻率（γ ~ η）成线性比例。随着模态数的增加，发现了以通常的γ ~ η1/3尺度向阻性气胀模的转变。对DIII‐D [Phys]中的参数进行了类似的分析。流体学报[B] 21,1405(1990)]，适用于L模态和H模态。结果表明，L模不稳定，但β β i /6，其中β i是理想不稳定的临界β。H模式对电阻模式是弱不稳定的，对于更不稳定的理想模式，H模式仅比β阈值低约2倍。
The stability of drift resistive ballooning modes is examined using the reduced Braginskii equations, which include electron temperature and magnetic fluctuations. The Texas Experimental Tokamak (TEXT) [Phys. Fluids B 2, 2879 (1990)] edge plasma is found to be unstable for a broad range of mode numbers. For low mode numbers (m<70), the plasma is unstable to the drift resistive ballooning mode, which has a growth rate that scales linearly with the resistivity (γ∼η). As the mode number increases, a transistion is found to the resistive ballooning mode with the usual scaling of γ∼η1/3. A similar analysis is made for parameters from DIII‐D [Phys. Fluids B 2, 1405 (1990)] for both the L mode and the H mode. It is found that the L mode is unstable to the resistive mode, but β ≊ βI/6, where βI is the critical β for the ideal instability. The H mode is weakly unstable to the resistive mode and is only about a factor of 2 below the β threshold for the more robustly unstable ideal mode.