Effects of electron temperature on the ion extraction characteristics in a decaying plasma confined between two parallel plates

作     者：Jian CHEN Tianzuo FU Heng GUO Heping LI Dongjun JIANG Mingsheng ZHOU 陈坚;付天佐;郭恒;李和平;姜东君;周明胜

作者机构：Department of Engineering PhysicsTsinghua UniversityBeijing 100084People's Republic of China 

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

年 卷 期：2019年第21卷第4期

页      面：99-106页

核心收录：

学科分类：08[工学] 0827[工学-核科学与技术] 

基　　金：国家自然科学基金 the authors wish to thank Professor Igor D Kaganovich and Dr Alexander V Khrabrov of Princeton Plasma Physics Laboratory of the USA for their helpful suggestions and comments 

主　　题：low-pressure plasma decaying plasma sheath dynamics 

摘      要：In this paper,a one-dimension particle-in-cell(PIC)code(EDIPIC)is employed to simulate the parallel-plate ion extraction process under an externally applied electrostatic field,focusing on the analysis of the influe nee of the initial electron temperature on the extracted ion fluxes to the metal plates during the ion extraction *** with previously published results,the plasma oscillations on a timescale of the electron plasma period,and the excitation of the ion acoustic rarefaction waves resulting from the plasma oscillations originating from both the negative and positive electrodes,are studied for the first *** modeling results show that both the negative and positive extractors can collect ions due to the plasma oscillations and the propagation of the ion acoustic rarefaction *** the in crease of the initial electron temperature achieved by keeping other parameters unchanged,on the one hand,both the ion speed and flux to the negative and positive plates increase,which leads to a significant decrease of the ion extraction time,while on the other hand,the ion flux to the positive plate after the formation of a Child-Langmuir sheath is much more sensitive to an increase of the initial electron temperature than that to the negative *** PIC simulation results provide a deeper physical understanding of the influence of the initial electron temperature on the characteristics of the entire ion extraction process in a decaying plasma.