低频Alfvén波与等离子体的非共振相互作用  

The Non-resonant Interaction of Low-frequency Alfvén Waves and Plasmas

作　　者：李克华[1] 路兴强[1] 龚学余[1] 兰恒[1] 钱新元[1] 

机构地区：[1]南华大学核科学技术学院,湖南衡阳421001

出　　处：《南华大学学报（自然科学版）》2012年第1期1-4,共4页Journal of University of South China：Science and Technology

基　　金：国家自然科学基金资助项目(11075073;41104094);国家973ITER专项基金资助项目(2009GB105002);湖南省教育厅基金资助项目(10C1152);博士科研启动基金资助项目(2010XQD30);南华大学校级创新课题基金资助项目(xjkt2010012)

摘　　要：采用单粒子模型,对两支左旋极化低频Alfvén波与等离子体的非共振相互作用进行粒子模拟,讨论了三种不同波幅时垂直与平行方向的加热效果,在非共振加热阶段,加热效果与波幅有关,波幅越大效果越好;而经过随机加热后,粒子动力学温度的最大值仅由外加磁场的能量密度与等离子体密度的比值决定与Alfvén波幅无关.加热过程中,离子被加速最终获得一个相当于Alfvén波相速度大小的流速.In this paper,the non-resonant interaction of the two left-hand polarization low-fre- quency and plasmas is simulated with a single-particle model. The heating effect of parallel and perpendicular to the background magnetic field direction with the three different amplitudes is mainly discussed. The heating effect has no concern with the amplitude at the non-resonance heating stage, and the heating effect is better with the amplitude increasing. After the stochastic heating,the maximum kinetic temperature of ions has no relevance to the Alfven wave amplitude, and is only dependent on the ratio of the magnetic field energy density and plasma density. In the heating process ,ions are significantly accelerated in the parallel direction ,and attain a bulk speed which is roughly equal to the Alfven wave phase velocity.

关 键 词：单粒子模型 低频Alfvén波 非共振加热 随机加热 

分 类 号：O53[理学—等离子体物理]