Effect of electron thermal anisotropy on the kinetic cross-field streaming instability
Effect of electron thermal anisotropy on the kinetic cross-field streaming instability
复制标题
电子热各向异性对动力学交叉场流动不稳定性的影响
DOI：
10.1017/s002237780000194x
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发表时间：
1984
影响因子：
2.5
通讯作者：
L. F. Ziebell
中科院分区：
文献类型：
--
作者：
S. Tsai;M. Tanaka;J. Gaffey;E. H. Jornada;C. Wu;L. F. Ziebell
对动力学交叉场流动不稳定性的研究，是由无碰撞冲击波的研究所激发的，以前由Wu等人进行了研究，在目前的工作中进行了更充分的讨论。由于，在一个准垂直冲击的斜坡区，电子可以优先在横向于环境磁场的方向加热，这是既可取的，也是必要的，包括与冲击相关的不稳定性的热各向异性的影响。本研究发现，当电子β足够高时，Te_（1-x）> Te_（2-x）可以显著提高交叉场流动不稳定性的峰值增长率。此外，本分析还改进了以前获得的解析和数值解。
The investigation of the kinetic cross-field streaming instability, motivated by the research of collisionless shock waves and previously studied by Wu et al., is discussed more fully in the present work. Since, in the ramp region of a quasi-perpendicular shock, electrons can be preferentially heated in the direction transverse to the ambient magnetic field, it is both desirable and necessary to include the effect of the thermal anisotropy on the instability associated with a shock. The present study has found that Te⊥ > Te‖ can significantly enhance the peak growth rate of the cross-field streaming instability when the electron beta is sufficiently high. Furthermore, the present analysis also improves the analytical and numerical solutions previously obtained.