Theoretical Analysis on Effect of Adding Argon to Hydrogen Plasma

作     者：胡纯栋 E.Speth 

作者机构：Institute of Plasma Physics Chinese Academy of Sciences Hefei 230031 China Max-Planck-Institut fiir Plasmaphysik EURATOM-Association 85748 Garching Germany 

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

年 卷 期：2004年第6卷第2期

页      面：2204-2212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：This main work is finished in Max Planck Institute of plasma physics The authors wish to acknowledge the significant contributions of group of NBI in Max Planck Institute of plasma physics 

主　　题：H- ion beam Ar effect neutral beam injection 

摘      要：An increased of H ion beam current whenever argon gas is added has been observed. The physics behind argon effect is that in the production of more H atoms, a part of H atoms will be converted to H2*(v4) to increase H- density. Increase of nH depends on the rate of added Ar η %, primary filling pressure P, electron density neAr and recombination coefficient 7 of H atom. Adding 25% Ar is optimal, although there have been assumed various parameters. Increase of nH depends on decreased recombination coefficient 7, and increased primary filling pressure P. The increase of nH is small when the pressure P 0.3 Pa. Optimized volume size L/R^2 is optimal for obtaining a maximum Ar effect.