Effects of magnetic field on anisotropic temperature relaxation

Effects of magnetic field on anisotropic temperature relaxation
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磁场对各向异性温度弛豫的影响

DOI:
10.1063/1.4795728
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发表时间:
2013-03
期刊:
影响因子:
2.2
通讯作者:
Li, Ding
Li, Ding
中科院分区:
物理与天体物理3区
文献类型:
--
作者:
Dong, Chao;Ren, Haijun;Cai, Huishan;Li, Ding

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在强磁化等离子体中,粒子的热回旋半径小于德拜长度,磁场对等离子体的弛豫过程有很大的影响。通过考虑均匀磁场中带电粒子间的二元碰撞,利用微扰理论,得到了电子和离子平行和垂直温度随时间变化率的表达式,并对各向异性小的情况进行了解析计算。基于这些表达式,由于电子-电子碰撞,离子-离子碰撞,和电子-离子碰撞的各向异性的电子和离子温度的弛豫磁场的影响进行了研究。计算了各向异性电子和离子温度到各向同性的弛豫时间。结果表明,电子-离子碰撞可以影响弛豫的各向异性离子分布在强磁场中。
In a strongly magnetized plasma, where the particles' thermal gyro-radii are smaller than the Debye length, the magnetic field greatly affects the plasma's relaxation processes. The expressions for the time rates of change of the electron and ion parallel and perpendicular temperatures are obtained and calculated analytically for small anisotropies through considering binary collisions between charged particles in the presence of a uniform magnetic field by using perturbation theory. Based on these expressions, the effects of the magnetic field on the relaxation of anisotropic electron and ion temperatures due to electron-electron collisions, ion-ion collisions, and electron-ion collisions are investigated. Consequently, the relaxation times of anisotropic electron and ion temperatures to isotropy are calculated. It is shown that electron-ion collisions can affect the relaxation of an anisotropic ion distribution in the strong magnetic field.
DOI: 10.1063/1.866104
发表时间: 1987-09
期刊: Physics of Fluids
影响因子: 4.6
作者:
P. Hjorth;T. M. O'Neil
通讯作者: P. Hjorth;T. M. O'Neil
DOI: 10.1103/physreve.79.066405
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期刊: Physical review. E, Statistical, nonlinear, and soft matter physics
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发表时间: 1985-11
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