Abstract

A method for calculating fluctuations in the nonequilibrium plasma-containing random inhomogeneities is developed. Using this method, the fluctuation spectrum in the region of the plasma line is calculated for the case of large-scale inhomogeneities with their characteristic dimensions exceeding the length of plasma waves. The results obtained are valid for both strong and weak inhomogeneities. It is shown that even in the case of weak inhomogeneities the induced broadening of the spectrum can significantly exceed the broadening connected with the Landau damping and electron collisions. Therefore, when experiments on plasma diagnostics using the Thomson scattering technique are interpreted, it is necessary to take into account the influence of random inhomogeneities on the fluctuation spectrum.

中文翻译：

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非平衡等离子体中随机不均匀性对波动谱的影响

摘要

提出了一种计算非平衡等离子体随机不均匀性波动的方法。使用这种方法，对于特征尺寸超过等离子波长度的大规模不均匀情况，可计算等离子线区域的波动谱。获得的结果对于强不均匀性和弱不均匀性均有效。结果表明，即使在非均匀性较弱的情况下，引起的光谱展宽也可以大大超过与兰道阻尼和电子碰撞有关的展宽。因此，在解释使用汤姆森散射技术进行等离子体诊断的实验时，有必要考虑随机不均匀性对波动谱的影响。