摘要
利用线性场理论,对填充环形等离子体的介质切伦可夫脉塞进行了详尽的分析;讨论了薄环形相对论电子注包围环形等离子体、处于环形等离子体之间和位于环形等离子体之内,这三种情况下的注波互作用,分别导出了其色散方程;并对色散方程直接进行了数值求解;求得了系统的截止频率、工作频率和波增长率,讨论了有关参数对它们的影响。
Making use of the linear field theory, the dielectric Cherenkov maser with an annular plasma is analysed in detail. The beam-wave interactions corresponding to (a) the thin annular relativistic electron beam (TAREB) surrounding the annular plasma, (b) TAREB within the annular plasma, and (c) TAREB inside the annular plasma, are discussed; and the dispersion equations are derived, respectively. Numerical solutions for the dispersion equations with a complex angular frequency are directly carried out. And the cut-off frequency, the operation frequency and the wave growth rate in the slow-wave system are obtained. Finally, the effects of related parameters on them are presented.
基金
国家自然科学基金
国家"863"强激光计划资助项目
关键词
环形等离子体
色散方程
等离子体器件
Annular plasma, Dielectric Cherenkov maser, Dispersion equation, Numerical solution
