基于磁偏转的真空弧离子源成分诊断-复旦学报.PDF

第 39 卷 第 9 期 核 技 术 Vol.39, No.9 2016 年 9 月 NUCLEAR TECHNIQUES September 2016 基于磁偏转的真空弧离子源成分诊断 郑 乐 龙继东 董 攀 蓝朝晖 彭宇飞 （中国工程物理研究院流体物理研究所 绵阳 621900 ） 摘要 采用磁偏转的方法，对金属氢化物电极真空弧离子源放电产生的等离子体进行了成分诊断。采用了 TiD2 电极材料进行放电，测量了在30‒80 A 弧流情况下的各离子的组分。实验结果表明，弧流越大时等离子体的密 度越大，在现有引出结构下，由于等离子体发射面的凹凸变化导致测得的离子信号出现双峰。通过增加栅网可 以减少等离子密度，双峰情况会有所减少。另外，随着弧流增大，氘所占比例会有所增加，弧流达到60 A 以 上氘含量增幅不明显。 关键词 真空弧，金属氢化物，离子源，离子种类 + 中图分类号 TL817 .5 DOI: 10.11889/j.0253-3219.2016.hjs.39.090204 Study on ion species of vacuum arc ion source with analysis of magnetic ZHENG Le LONG Jidong DONG Pan LAN Zhaohui PENG Yufei (Institute of Fluid Physics , China Academy of Engineering Physics, Mianyang 621900, China) Abstract Background: The metallic hydrogen (deuterium) electrode vacuum arc ion source which can discharge plasma mainly containing metal ions, hydrogen ions and deuterium ions, is generally used to the ion gun or the small accelerator. Purpose: To study the deuterium ions ratio affected by the arc current, the deuterium ion ratio produced by the discharge of vacuum arc ion source with metallic deuterium electrode was measured. Methods: To separate metal ions, hydrogen ions and deuterium ions, the magnetic analysis was used. And the ions current was measured by the scintillators and Faraday cups. Results: Experimental results showed that, within a certain range of arc current, the greater the plasma density is, the change of plasma emission surface affected the collective of ions current more obviousl