MHD激波厚度对有限电导率的依赖性
Dependence of the MHD shock thickness on the finite electrical conductivity
摘要：
将无限电导率MHD平面激波的结果推广到有限电导率的等离子体。我们推导出绝热曲线，描述的冲击气体的演化以及熵密度的变化。对于平行冲击（即，其中磁场平行于冲击波阵面的法线），我们找到了冲击波厚度的表达式，该表达式是环境磁场和等离子体的有限电导率的函数。我们给出数值估计的物理参数的冲击厚度的顺序，或大于，在强磁化等离子体中的等离子体粒子的平均自由程。
英文摘要：
The results of MHD plane shock waves with infinite electrical conductivity are generalized for a plasma with a finite conductivity. We derive the adiabatic curves that describe the evolution of the shocked gas as well as the change in the entropy density. For a parallel shock (i.e., in which the magnetic field is parallel to the normal to the shock front) we find an expression for the shock thickness which is a function of the ambient magnetic field and of the finite electrical conductivity of the plasma. We give numerical estimates of the physical parameters for which the shock thickness is of the order of, or greater than, the mean free path of the plasma particles in a strongly magnetized plasma.
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