Bump-on-tail instability in space plasmas
Bump-on-tail instability in space plasmas
复制标题
空间等离子体中尾部碰撞的不稳定性
DOI：
10.1063/1.4933041
复制
发表时间：
2015
影响因子：
2.2
通讯作者：
Raicharan Denra
中科院分区：
文献类型：
--
作者：
S. Sarkar;Samit Paul;Raicharan Denra
本文研究了用具有谱指数κ的Kappa速度分布模型模拟的Langmuir波在非磁化洛伦兹等离子体中的碰撞不稳定性。利用朗缪尔波色散关系分析确定了微不稳定性的增长速率。利用太阳风数据，数值估计了不同数量密度和温度比下最大生长率随κ增加的变化。
Bump-on-tail instability of Langmuir waves propagating in unmagnetized Lorentzian plasma modeled by a Kappa velocity distribution with spectral index κ has been investigated in this paper. Growth rate of this microinstability has been determined analytically from the Langmuir wave dispersion relation. Change in the maximum growth rate with increasing κ has been numerically estimated for different number density and temperature ratios using solar wind data.