离子通道电子回旋脉塞电磁不稳定性  

Theoretical study of Electromagnetic instability on ion-channel electron cyclotron maser

作　　者：戴金伟[1] 刘三秋[1] 

机构地区：[1]南昌大学物理学系,江西南昌330031

出　　处：《南昌大学学报（理科版）》2012年第5期482-485,489,共5页Journal of Nanchang University(Natural Science)

基　　金：科技部国际科技合作项目(2009DFA02320);江西省创新团队资助项目(2010DQB00900)

摘　　要：采用三维流体理论,在考虑等离子波的影响的基础上,利用协变的相对论流体力学方程获得了离子通道电子回旋脉塞(ICECM)系统的色散方程,并通过数值计算获得了电磁不稳定性的增长率。分析色散方程发现,ICECM系统在等离子波的影响下,存在3种典型的电磁不稳定性工作模式,并且对不稳定性的物理机制进行了讨论。数值结果表明,电磁不稳定性最大增长率随着相对论因子的增大而增大,不稳定区域随着相对论因子的增加而减小。The dispersion equation for ion-channel electron cyclotron maser was obtained by adopting the covariant theory of relativity fluid mechanics equations and integrating the effect of plasma waves in the three-dimensional fluid theory.The electromagnetic instability growth curve was derived hrough the numerical calculation,too.We analyzed the dispersion equation and found that the ICECM existed three typical regions of electromagnetic instability after considering the influence of the plasma wave.Some potential physical mechanisms for the instability were discussed.The numerical results revealed that with the rise of the relativity factor,the growth rate of the electromagnetic stability increased,whereas the unstable region decreased.

关 键 词：电磁不稳定性 协变流体方程 回旋脉塞 色散方程 

分 类 号：O534[理学—等离子体物理]