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采用理想磁流体力学模型,利用绝热近似方法,推导出托卡马克等离子体极向转动体系中带状流的色散方程,分析了极向转动对带状流产生的影响。结果表明,等离子体极向转动体系下,测地声模频率和声波频率都会随极向转动马赫数而增大。带状流的频率与采用等温近似时有一定的数值差别;测地声模的密度扰动量形式也发生变化,由静态体系中纯驻波的形式,变为由一个驻波和一个小振幅行波叠加的形式。
Using ideal magnetohydrodynamic model, the adiabatic approximation method is used to derive the dispersion equation of the ribbon flow in the polar rotation system of Tokamak plasma. The influence of polar rotation on the ribbon flow generation is analyzed. The results show that under the plasma polar rotation system, the geophone frequency and the sound wave frequency increase with the Polar rotation Mach number. The frequency of ribbon flow is different from that of isothermal approximation. The form of density perturbation of geophone also changes from the pure standing wave in the static system to one consisting of a standing wave and a small amplitude line Wave superposition of the form.