压致电离复合耗散对磁声波的慢吸收
Slow magnetosonic wave absorption by pressure induced ionization-recombination dissipation
摘要：
提出了一种新的慢磁声波（SMW）的电离度压力振荡阻尼机制。定量地推导出阻尼率的显式公式。新机制将占主导地位的物理条件进行了简要讨论。电离-复合阻尼是频率无关的，没有流体动力学解释。一般来说，大面积的部分电离等离子体是SMW低频的阻尼器，而通常的MHD机制是作为低通滤波器工作的。导出的阻尼率与恒定磁场和波矢之间的正弦的平方成比例。定性地考虑了由湍流区产生的SMW波和Alfvén波（AW）通过大范围部分电离等离子体时谱密度的角分布。计算的阻尼率表示的电子碰撞截面的氢原子，并在短期内提出的阻尼机制的所有细节进行了研究。
英文摘要：
A new mechanisms for damping of slow magnetosonic waves (SMW) by pressure induced oscillations of the ionization degree is proposed. An explicit formula for the damping rate is quantitatively derived. Physical conditions where the new mechanism will dominate are briefly discussed. The ionization-recombination damping is frequency independent and has no hydrodynamic interpretation. Roughly speaking large area of partially ionized plasma are damper for basses of SMW while usual MHD mechanisms operate as a low pass filter. The derived damping rate is proportional to the square of the sine between the constant magnetic field and the wave-vector. Angular distribution of the spectral density of SMW and Alfvén waves (AW) created by turbulent regions and passing through large regions of partially ionized plasma is qualitatively considered. The calculated damping rate is expressed by the electron impact cross section of the hydrogen atom and in short all details of the proposed damping mechanisms are well studied.
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