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氘化物阴极真空弧放电光斑分布

董攀 刘尔祥 李杰 江孝国 王韬 石金水 龙继东

董攀, 刘尔祥, 李杰, 等. 氘化物阴极真空弧放电光斑分布[J]. 强激光与粒子束, 2021, 33: 034006. doi: 10.11884/HPLPB202133.200322
引用本文: 董攀, 刘尔祥, 李杰, 等. 氘化物阴极真空弧放电光斑分布[J]. 强激光与粒子束, 2021, 33: 034006. doi: 10.11884/HPLPB202133.200322
Dong Pan, Liu Erxiang, Li Jie, et al. Luminous spot distribution of vacuum arc discharge with deuteride cathode[J]. High Power Laser and Particle Beams, 2021, 33: 034006. doi: 10.11884/HPLPB202133.200322
Citation: Dong Pan, Liu Erxiang, Li Jie, et al. Luminous spot distribution of vacuum arc discharge with deuteride cathode[J]. High Power Laser and Particle Beams, 2021, 33: 034006. doi: 10.11884/HPLPB202133.200322

氘化物阴极真空弧放电光斑分布

doi: 10.11884/HPLPB202133.200322
基金项目: 国家自然科学基金项目(11975217)
详细信息
    作者简介:

    董 攀(1983—),男,博士,副研究员,主要研究方向为等离子体放电及诊断;panner95@163.com

    通讯作者:

    李 杰(1986—),男,博士研究生,副研究员,主要研究方向为等离子体放电及束流动力学;nlijie@sina.com

  • 中图分类号: O461.2

Luminous spot distribution of vacuum arc discharge with deuteride cathode

  • 摘要: 氘化物真空弧放电在许多领域均有应用,如无损检测、石油探井、中子活化分析等。和金属阴极不同,氘化物阴极放电时会释放大量的气体分子,表现出许多不同性质。采用放大镜头和ICCD相机观察了氘化物阴极真空弧放电光斑分布。测量系统的空间分辨率约为5 μm,时间分辨率最小2 ns。放电脉冲半高全宽(FWHM)0.9 μs,弧流波形为半周期正弦波。实验结果表明,氘化物真空弧放电时,所有阴极斑聚集为一个群落,表现为一个大光斑;在液滴作用下,阴极斑群落偶尔也会分裂为两个或多个群落;光斑形状不受弧流影响,但面积和亮度会随弧流增加而增大。氘化物阴极放电斑点聚集有利于产生高密度等离子体,提高放电效率。
  • 图  1  实验布局示意图

    Figure  1.  Schematic of the experimental layout

    图  2  放大镜头和ICCD相机拍摄的分辨率板图像

    Figure  2.  Resolution board image taken by zoom lens and ICCD camera

    图  3  弧流和弧压波形及拍摄时刻

    Figure  3.  Typical waveforms of arc current and arc voltage, and photographic moments

    图  4  不同时刻放电光斑图像

    Figure  4.  Luminous images at different moments

    图  5  两个放电光斑的情形

    Figure  5.  Situation of two luminous spots

    图  6  曝光时间100 ns时光斑图像

    Figure  6.  Luminous image at 100 ns exposure time

    图  7  不同弧流下放电光斑

    Figure  7.  Luminous images at different arc currents

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出版历程
  • 收稿日期:  2020-11-30
  • 修回日期:  2021-01-25
  • 网络出版日期:  2021-03-30
  • 刊出日期:  2021-03-05

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