中国物理B ›› 2011, Vol. 20 ›› Issue (6): 65201-065201.doi: 10.1088/1674-1056/20/6/065201

• PHYSICS OF GASES, PLASMAS, AND ELECTRIC DISCHARGES • 上一篇    下一篇

Landau damping of longitudinal oscillation in ultra- relativistic plasmas with nonextensive distribution

刘三秋, 陈小昌   

  1. Department of Physics, Nanchang University, Nanchang 330031, China
  • 收稿日期:2010-11-03 修回日期:2010-11-25 出版日期:2011-06-15 发布日期:2011-06-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10963002), the International S & T Coopera- tion Program of China and Jiangxi Province (Grant No. 2009DFA02320), the Program for Innovative Research Team of Nanchang University, and the National Basic Research Program of China (Grant No. 2010CB635112).

Landau damping of longitudinal oscillation in ultra- relativistic plasmas with nonextensive distribution

Liu San-Qiu (刘三秋), Xiao-Chang (陈小昌)   

  1. Department of Physics, Nanchang University, Nanchang 330031, China
  • Received:2010-11-03 Revised:2010-11-25 Online:2011-06-15 Published:2011-06-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10963002), the International S & T Coopera- tion Program of China and Jiangxi Province (Grant No. 2009DFA02320), the Program for Innovative Research Team of Nanchang University, and the National Basic Research Program of China (Grant No. 2010CB635112).

摘要: The generalized dispersion equation for longitudinal oscillation in an unmagnetized, collisionless, isotropic and relativistic plasma is derived in the context of nonextensive q-distribution. An analytical expression for the Landau damping is obtained in an ultra-relativistic regime, which is related to q-parameter. In the limit q → 1, the result based on the relativistic Maxwellian distribution is recovered. It is shown that the interactions between the wave and particles are stronger and the waves are more strongly damped for lower values of q-parameter. The results are explained by the increased number of superthermal particles or low velocity particles contained in the plasma with the nonextensive distribution.

Abstract: The generalized dispersion equation for longitudinal oscillation in an unmagnetized, collisionless, isotropic and relativistic plasma is derived in the context of nonextensive q-distribution. An analytical expression for the Landau damping is obtained in an ultra-relativistic regime, which is related to q-parameter. In the limit q → 1, the result based on the relativistic Maxwellian distribution is recovered. It is shown that the interactions between the wave and particles are stronger and the waves are more strongly damped for lower values of q-parameter. The results are explained by the increased number of superthermal particles or low velocity particles contained in the plasma with the nonextensive distribution.

Key words: relativistic plasma, Landau damping, nonextensive distribution, longitudinal oscillation

中图分类号:  (Elementary processes in plasmas)

  • 52.20.-j
52.25.Dg (Plasma kinetic equations) 52.27.Ny (Relativistic plasmas) 52.35.-g (Waves, oscillations, and instabilities in plasmas and intense beams)