Influence of a centered dielectric tube on inductively coupled plasma source: Chamber structures and plasma characteristics  

作　　者：毕振华 洪义 雷光玖 王帅 王友年 刘东平 

机构地区：[1]Liaoning Key Laboratory of Optoelectronic Films & Materials, School of Physics and Materials Engineering,Dalian Nationalities University [2]Southwestern Institute of Physics [3]Physics Department, School of Science, Northeastern University [4]School of Physics and Optoelectronic Technology, Dalian University of Technology

出　　处：《Chinese Physics B》2017年第7期250-255,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11305028,11305032,and 11320101005)

摘　　要：A high-density RF ion source is an essential part of a neutral beam injector. In this study, the authors attempt to retrofit an original regular RF ion source reactor by inserting a thin dielectric tube through the symmetric axis of the discharge chamber. With the aid of this inner tube, the reactor is capable of generating a radial magnetic field instead of the original transverse magnetic field, which solves the E × B drift problem in the current RF ion source structure. To study the disturbance of the dielectric tube, a fluid model is introduced to study the plasma parameters with or without the internal dielectric tube, based on the inductively coupled plasma（ICP） reactor. The simulation results show that while introducing the internal dielectric tube into the ICP reactor, both the plasma density and plasma potential have minor influence during the discharge process, and there is good uniformity at the extraction region. The influence of the control parameters reveals that the plasma densities at the extraction region decrease first and subsequently slow down while enhancing the diffusion region.A high-density RF ion source is an essential part of a neutral beam injector. In this study, the authors attempt to retrofit an original regular RF ion source reactor by inserting a thin dielectric tube through the symmetric axis of the discharge chamber. With the aid of this inner tube, the reactor is capable of generating a radial magnetic field instead of the original transverse magnetic field, which solves the E × B drift problem in the current RF ion source structure. To study the disturbance of the dielectric tube, a fluid model is introduced to study the plasma parameters with or without the internal dielectric tube, based on the inductively coupled plasma（ICP） reactor. The simulation results show that while introducing the internal dielectric tube into the ICP reactor, both the plasma density and plasma potential have minor influence during the discharge process, and there is good uniformity at the extraction region. The influence of the control parameters reveals that the plasma densities at the extraction region decrease first and subsequently slow down while enhancing the diffusion region.

关 键 词：neutral beam ion source inductively coupled plasma（ICP） fluid model 

分 类 号：O53[理学—等离子体物理]