Alfv佴n 波与等离子体的共振相互作用 - 南华大学学报.PDF

第28卷第1期 南华大学学报(自然科学版) Vol郾28 No郾1 2014年3月 Journal of University of South China(Science and Technology) Mar郾2014 文章编号:1673-0062(2014)01-0005-04 Alfv佴n波与等离子体的共振相互作用 1,2 1* 肖宾宾 ,龚学余 (1.南华大学 核科学技术学院,湖南 衡阳421001;2.衡阳师范学院物理与电子信息科学系,湖南 衡阳421008) 摘摇 要:采用粒子模拟(PIC)方法,研究沿背景磁场传播的Alfv佴n 波与均匀磁化等离 子体共振相互作用的过程.模拟结果表明:共振加热过程中,在平行和垂直于背景磁 场的方向上,质子温度均得到增加,且垂直方向上的温度增加更为明显,等离子体温 度呈现各向异性;同时,不同的波频率影响波粒子加热效果,并且一定范围内,共振加 热期间,共振波频率越大,加热效果越好.而经过随机加热后,粒子动力学温度的最大 值与波频率无关,仅仅与波的相速度相关. 关键词:Alfv佴n 波;粒子模拟;共振加热 中图分类号:O53摇 摇 摇 文献标识码:A The Resonant Interaction of Alfv佴n Waves and Plasmas 1,2 1 * XIAO Bin鄄bin ,GONG Xue鄄yu (1.School of Nuclear Science and Technology,University of South China,Hengyang, Hunan421001,China;2.Department of Physics and Electronic Information Science, Hengyang Normal University,Hengyang,Hunan421008,China) Abstract:Using the test particle simulation method,the interactions between the uniform magnetized plasmas and Alfv佴n waves propagating along background magnetic field are studied.The results show that,in the heating process,the proton temperature in parallel andperpendicular directionsof thebackgroundmagneticfieldareelevated.Theincreaseof temperature invertical direction ismore obviousthanthat intheparallel direction,andthe temperature of plasmas exhibits anisotropy.Meanwhile,the frequencies of waves have an effect on the heating.The effect of resonance heating is better than that of non鄄resonance heating.Moreover,in resonance heating period within a certain range,thefrequency islar鄄 ger,the heat