EAST-NBI离子源电极打火分析及处理

许永建; 张黎; 谢亚红; 蒋才超; 梁立振; 胡纯栋

doi:10.11889/j.0253-3219.2017.hjs.40.110603

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EAST-NBI离子源电极打火分析及处理

核能科学与工程 | 更新时间：2021-05-19

- EAST-NBI离子源电极打火分析及处理
- Analysis and processing of breakdown of ion source for EAST neutral beam injector
- 核技术 2017年40卷第11期文章编号：110603
- 作者机构：
  
  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：
  
  [ "许永建, 男, 1977年出生, 2009年于中国科学院研究生院获博士学位, 现为副研究员, 主要从事中性束诊断及实验研究", "XU Yongjian, male, born in 1977, graduated from Graduate University of Chinese Academy of Sciences with a doctoral degree in 2009, associate research fellow, focusing on neutral beam diagnosis and experimental research" ]
  谢亚红, E-mail:xieyh@ipp.ac.cn XIE Yahong, E-mail:xieyh@ipp.ac.cn
- 基金信息：
  
  中国科学院等离子体物理研究所所长基金(DSJJ-15-GC03);国家自然科学基金(11405207);国家自然科学基金(11675215)
- DOI：10.11889/j.0253-3219.2017.hjs.40.110603
  中图分类号： TL654
- 收稿日期：2017-02-24，
  
  修回日期：2017-06-07，
  
  纸质出版日期：2017-11-10
- 稿件说明：
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许永建, 张黎, 谢亚红, 等. EAST-NBI离子源电极打火分析及处理[J]. 核技术, 2017,40(11):110603

Yongjian XU, Li ZHANG, Yahong XIE, et al. Analysis and processing of breakdown of ion source for EAST neutral beam injector[J]. Nuclear techniques, 2017, 40(11): 110603
许永建, 张黎, 谢亚红, 等. EAST-NBI离子源电极打火分析及处理[J]. 核技术, 2017,40(11):110603 DOI： 10.11889/j.0253-3219.2017.hjs.40.110603.

Yongjian XU, Li ZHANG, Yahong XIE, et al. Analysis and processing of breakdown of ion source for EAST neutral beam injector[J]. Nuclear techniques, 2017, 40(11): 110603 DOI： 10.11889/j.0253-3219.2017.hjs.40.110603.

摘要

强流离子源是EAST（Experimental Advanced Superconducting Tokamak）中性束注入器（Neutral Beam Injector，NBI）最关键的核心部件，其能达到的性能在很大程度上决定了EAST中性束注入器所能达到的指标。离子源在束引出时电极打火现象偶有发生，这对于离子源的正常运行有非常严重的影响，甚至危害离子源的寿命。本文结合离子源运行过程中的束引出实验波形和水流量热计（Water Flow Calorimetry，WFC）系统的测量数据得出等离子体发射面的束流光学系统一直处于非最佳聚焦状态是导致打火的原因，试通过优化高压投入时刻等离子体与高压的匹配，实现高压的稳定投入有效抑制打火现象的发生，并且给离子源加入硬件保护机制，为离子源安全稳定运行奠定基础。

Abstract

Background

The high current ion source is a key component of neutral beam injector

and its reachable performance determines the achievable targets of the experimental advanced superconducting tokamak (EAST) neutral beam injector (NBI). Electrode breakdown of ion source happens occasionally during the beam extraction

which has a very serious impact on the normal operation of ion source and even endangers the life of the ion source.

Purpose

This paper aims to analyze the reason of breakdown and propose improvement measures.

Methods

The waveforms of beam extraction and the data of water flow calorimetry (WFC) of the abnormal shot of 7801 and normal shot of 7799 were studied.

Results

The analysis shows that the cause of breakdown is the dual effect of over-focus and under-focus of extraction beam. Optimizing the matching of the plasma and the high pressure can effectively reduce the phenomenon of breakdown

and in order to protect ion source

a hardware protection mechanism is added.

Conclusion

The analysis results lay a foundation for the safe and stable operation of ion source.

关键词

Keywords

references

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关联资源

EAST中性束注入器研制进展

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