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arXiv 0811.1201physics.plasm-phphysics.space-ph
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场反转位形中漂移波的稳定性

Stability of drift waves in a field reversed configuration

A. Surjalal Sharma

摘要:

在没有环形磁场的场反转结构中,漂移波在等离子体输运中起着重要的作用。在这些系统中,极向场的短连接长度通过影响波粒共振而导致显著的稳定。在大长径比的限制下,场反转位形采用圆柱形Bennett箍缩模型。从动力学理论出发,导出了普适模的径向本征模方程,并用二次型方法研究了其稳定性。场线的短连接长度导致等离子体内部的离子朗道阻尼,并且模式的稳定性取决于温度比Ti/Te的值

英文摘要:

The drift waves in field-reversed configurations without a toroidal magnetic field, therefore no shear, play an important role in plasma transport. The short connection length of the poloidal field in these systems leads to significant stabilization by influencing the wave particle resonance. The field reversed configuration is modeled by the cylindrical Bennett pinch in the limit of large aspect ratio. The radial eigenmode equation for the universal mode is derived from kinetic theory and the method of quadratic forms is used to study its stability. The short connection lengths of the field lines lead to ion Landau damping on the inside of the plasma and the stability of the mode depend on the value of the temperature ratio Ti/Te

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