量子尘埃等离子体中尘埃充电对尘埃声波的影响  

Influence of dust grains charging on dust acoustic waves in quantum dusty plasmas

作　　者：罗荣祥[1] 陈辉[1] 

机构地区：[1]南昌大学物理系,南昌330031

出　　处：《强激光与粒子束》2015年第6期243-246,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金项目(11178002);江西省自然科学基金项目(20142BAB212005);江西省教育厅青年科学基金项目(GJJ14224)

摘　　要：采用流体动力学方程组和尘埃充电方程组成的自洽模型系统,对量子尘埃等离子体中的尘埃声波波动性质进行了研究。通过线性理论分析方法得到系统的尘埃声波波动方程及其色散关系,并对色散关系进行了数值分析。研究表明:充电效应定性地修正了尘埃声波的色散特性,引起尘埃声波的耗散,其耗散强度主要与尘埃等离子体的参数有关。最后,分析了引起尘埃声波耗散的物理原因。Based on the self-consistent system of the quantum hydrodynamic equations and dust grains charging equation for electron-ion-dust plasmas, and taking into account the quantum effects of the electrons and ions, we studied the influences of dust grains charging on dust acoustic waves in the quantum dusty plasmas. To derive and study a dispersion relation for a dust mode we applied the linear theory analysis method and used numerical simulation. It is found that the dispersion characteristics of dust acoustic waves are qualitatively modified by the charging effect, leading to the dissipation of dust acoustic waves. The dissipation strength mainly depends on the dust plasma parameters. Finally, the physical cause of the dissipation is analyzed.

关 键 词：量子尘埃等离子体 尘埃粒子 充电效应 尘埃声波 

分 类 号：O534[理学—等离子体物理]