Weak turbulence theory for collisional plasmas.
Weak turbulence theory for collisional plasmas.
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碰撞等离子体的弱湍流理论
DOI：
10.1103/physreve.93.033203
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发表时间：
2016
期刊：
影响因子：
--
通讯作者：
Schlickeiser
中科院分区：
文献类型：
--
作者：
Ziebell;Kontar;Schlickeiser
等离子体是一种电离气体，其中集体行为支配着单个粒子的相互作用。由于这个原因，等离子体通常被视为无碰撞或无碰撞。然而，粒子的离散性可能是重要的，而且通常，如果没有适当地考虑到离散粒子效应，等离子体的描述是不完整的。弱湍流理论是一种微扰非线性理论，其基本形式是在20世纪50年代末和60年代发展起来的，并一直持续到80年代初。然而，文献中发现的标准材料并没有完全处理热粒子自发发射的离散粒子效应和相关波动。等离子体粒子在所有频率和波矢量上发射电磁波动，但在标准文献中，只考虑满足色散关系的特征模（或正常模）对应的频率波数区来近似处理这些波动，而忽略了非特征模的贡献。本文表明，非本征模波动修正了粒子动力学方程，使其广义方程包含了balescu - l<s:1>纳德-朗道碰撞积分，并修正了波动动力学方程，使其不仅包含了碰撞阻尼项，而且还包含了描述等离子体正模的弱致辐射的项。
Plasma is an ionized gas in which the collective behavior dominates over the individual particle interactions. For this reason, plasma is often treated as collisionless or collision-free. However, the discrete nature of the particles can be important, and often, the description of plasmas is incomplete without properly taking the discrete particle effects into account. The weak turbulence theory is a perturbative nonlinear theory, whose essential formalism was developed in the late 1950s and 1960s and continued on through the early 1980s. However, the standard material found in the literature does not treat the discrete particle effects and the associated fluctuations emitted spontaneously by thermal particles completely. Plasma particles emit electromagnetic fluctuations in all frequencies and wave vectors, but in the standard literature, the fluctuations are approximately treated by considering only those frequency-wave number regimes corresponding to the eigenmodes (or normal modes) satisfying the dispersion relations, while ignoring contributions from noneigenmodes. The present paper shows that the noneigenmode fluctuations modify the particle kinetic equation so that the generalized equation includes the Balescu-Lénard-Landau collision integral and also modify the wave kinetic equation to include not only the collisional damping term but also a term that depicts the bremsstrahlung emission of plasma normal modes.
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影响因子：
2.2
作者：
P. Yoon
通讯作者：
P. Yoon
等离子体中的辐射过程
影响因子：
4.6
作者：
T. Birmingham;J. Dawson;C. Oberman
通讯作者：
C. Oberman
行星际等离子体中电子束激发弱湍流的数值模拟
影响因子：
2.8
作者：
R. Grognard
通讯作者：
R. Grognard
影响因子：
2.2
作者：
L. F. Ziebell;Peter H. Yoon;R. Gaelzer;J. Pavan
通讯作者：
J. Pavan
活跃星系核喷流的非热辐射：静电轫致辐射替代同步加速器辐射
影响因子：
6.5
作者：
R. Schlickeiser
通讯作者：
R. Schlickeiser