Thermal fluctuation levels of magnetic and electric fields in unmagnetized plasma: The rigorous relativistic kinetic theory
Thermal fluctuation levels of magnetic and electric fields in unmagnetized plasma: The rigorous relativistic kinetic theory
复制标题
非磁化等离子体中磁场和电场的热波动水平：严格的相对论动力学理论
DOI：
10.1063/1.4868232
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发表时间：
2014
影响因子：
2.2
通讯作者：
U. Kolberg
中科院分区：
文献类型：
--
作者：
P. Yoon;R. Schlickeiser;U. Kolberg
任何具有有限随机粒子速度的完全电离的无碰撞等离子体都包含电场和磁场涨落。波动可以有三种不同的类型：弱阻尼，弱传播，或非周期性。这些波动的动力学一般非磁化等离子体，受自发辐射，吸收和受激发射过程的竞争，进行了研究，扩展了众所周知的弱阻尼波动的结果。本文导出了适用于集体涨落和非集体涨落的广义基尔霍夫辐射定律，在稳态等离子体中，该定律通过各自的自发辐射系数与真实吸收系数之比给出了电磁涨落的平衡能量密度。作为一个说明性的例子，在密度为ne的各向同性热电子-质子等离子体中，非周期横向集体电磁涨落的平衡能量密度被计算为：|δB| =（δB）2=2.8（nemec2）1/2...
Any fully ionized collisionless plasma with finite random particle velocities contains electric and magnetic field fluctuations. The fluctuations can be of three different types: weakly damped, weakly propagating, or aperiodic. The kinetics of these fluctuations in general unmagnetized plasmas, governed by the competition of spontaneous emission, absorption, and stimulated emission processes, is investigated, extending the well-known results for weakly damped fluctuations. The generalized Kirchhoff radiation law for both collective and noncollective fluctuations is derived, which in stationary plasmas provides the equilibrium energy densities of electromagnetic fluctuations by the ratio of the respective spontaneous emission coefficient and the true absorption coefficient. As an illustrative example, the equilibrium energy densities of aperiodic transverse collective electric and magnetic fluctuations in an isotropic thermal electron-proton plasmas of density ne are calculated as |δB|=(δB)2=2.8(nemec2)1/2...