Effect of gas flow rate on back-streaming electron in the high current positive ion source for neutral beam injection

doi:10.16568/j.0254-6086.202102015

NUCLEAR FUSION AND PLASMA PHYSICS ›› 2021, Vol. 41 ›› Issue (2): 183-186.DOI: 10.16568/j.0254-6086.202102015

• Nuclear Fusion Engineering and Technology • Previous Articles Next Articles

Effect of gas flow rate on back-streaming electron in the high current positive ion source for neutral beam injection

WU Ming-shan1, 2, HU Chun-dong1, 2, XIE Ya-hong1, 2, YI Wei1, XU Yong-jian1, LIANG Li-Zhen1, 2

(1. Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031; 2. University of Science and Technology of China, Hefei 230026)

Received:2020-01-08 Revised:2020-09-18 Online:2021-06-15 Published:2021-06-24

进气量对强流正离子源反向电子流的影响研究

吴铭钐1, 2，胡纯栋1, 2，谢亚红*1, 2，邑伟1，许永建1，梁立振1, 2

(1. 中国科学院等离子体物理研究所，合肥 230031；2. 中国科学技术大学，合肥 230026)

作者简介:吴铭钐(1991-)，男，浙江杭州人，博士研究生，从事聚变用大功率离子源研究。
基金资助:
国家自然科学基金(11575240, 11975261)

Abstract

Abstract: The generation and behavior of the back-streaming electrons during the beam extraction process for EAST-NBI ion source are analyzed, and the influence of gas flow rate on ion source is calculated, and experimental research is carried out in typical cases. The experimental results indicate that gas flow rate has little effect on the proton ratio, and there is a positive correlation between gas flow rate and the flux of back-streaming electron.

Key words: High current ion source, Back-streaming electron, Gas flow rate

摘要： 分析了EAST-NBI离子源束引出过程中反向电子的产生及物理特性，对典型情况下的进气量对离子源的影响进行了计算和实验研究。实验结果发现，质子比受进气量影响较小，进气量与反向电子流呈明显正相关。

关键词: 强流离子源, 反向电子流, 进气量

CLC Number:

TL62+9.1

WU Ming-shan1, 2, HU Chun-dong1, 2, XIE Ya-hong1, 2, YI Wei1, XU Yong-jian1, LIANG Li-Zhen1, 2. Effect of gas flow rate on back-streaming electron in the high current positive ion source for neutral beam injection[J]. NUCLEAR FUSION AND PLASMA PHYSICS, 2021, 41(2): 183-186.

吴铭钐1, 2，胡纯栋1, 2，谢亚红*1, 2，邑伟1，许永建1，梁立振1, 2. 进气量对强流正离子源反向电子流的影响研究[J]. 核聚变与等离子体物理, 2021, 41(2): 183-186.

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Effect of gas flow rate on back-streaming electron in the high current positive ion source for neutral beam injection

进气量对强流正离子源反向电子流的影响研究

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