Induced Charge of Spherical Dust Particle on Plasma-facing Wall in Non-uniform Electric Field

作     者：Y.TOMITA R.SMIRNOV 朱思峥 

作者机构：National Institute for Fusion Science322-6 Oroshi-choToki 509-5292 Japan The Graduate University for Advanced Studies322-6 Oroshi-choToki 509-5292 Japan Institute of Plasma PhysicsChinese Academy of SciencesHefei 230031China 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2006年第8卷第1期

页      面：122-124页

核心收录：

学科分类：07[理学] 070204[理学-等离子体物理] 0702[理学-物理学] 

基　　金：supported in part by the JSPS-CAS Core-University Program in the field of Plasma and Nuclear Fusion 

主　　题：dust particle induced charge non-uniform electric field 

摘      要：Induced charge of a spherical dust particle on a plasma-facing wall was investigated analytically, where non-uniform electric field was applied externally. The one-dimensional nonuniform electrostatic potential was approximated by the polynomial of the normal coordinate toward the wall. The bipolar coordinate was introduced to solve the Laplace equation of the induced electrostatic potential. The boundary condition at the dust surface determines the unknown coefficients of the general solution of the Laplace equation for the induced potential. From the obtained potential the surface induced charge can be calculated. This result allows estimating the effect of the surrounding plasma, which shields the induced charge.