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4 MV/80 kA IVA型脉冲X射线照相装置研制进展

魏浩 尹佳辉 张鹏飞 孙凤举 邱爱慈 梁天学 曾江涛 姜晓峰 王志国 孙江 刘文元 呼义翔

魏浩, 尹佳辉, 张鹏飞, 等. 4 MV/80 kA IVA型脉冲X射线照相装置研制进展[J]. 强激光与粒子束, 2020, 32: 025013. doi: 10.11884/HPLPB202032.190331
引用本文: 魏浩, 尹佳辉, 张鹏飞, 等. 4 MV/80 kA IVA型脉冲X射线照相装置研制进展[J]. 强激光与粒子束, 2020, 32: 025013. doi: 10.11884/HPLPB202032.190331
Wei Hao, Yin Jiahui, Zhang Pengfei, et al. Status of radiographic X-ray source driven by 4 MV, 80 kA induction voltage adder[J]. High Power Laser and Particle Beams, 2020, 32: 025013. doi: 10.11884/HPLPB202032.190331
Citation: Wei Hao, Yin Jiahui, Zhang Pengfei, et al. Status of radiographic X-ray source driven by 4 MV, 80 kA induction voltage adder[J]. High Power Laser and Particle Beams, 2020, 32: 025013. doi: 10.11884/HPLPB202032.190331

4 MV/80 kA IVA型脉冲X射线照相装置研制进展

doi: 10.11884/HPLPB202032.190331
基金项目: 国家自然科学基金项目(11975186,11875224,51790524)
详细信息
    作者简介:

    魏 浩(1986—),男,博士,副研究员,从事脉冲功率技术研究;weihao@nint.ac.cn

  • 中图分类号: TM836

Status of radiographic X-ray source driven by 4 MV, 80 kA induction voltage adder

  • 摘要: 介绍了西北核技术研究院研制的4 MV脉冲X射线闪光照相装置(“剑光二号”)系统组成和实验结果。装置基于感应电压叠加器(IVA)驱动阳极杆箍缩二极管(RPD)技术,主要由前级脉冲功率源、感应电压叠加器和RPD等组成。前级脉冲功率源由两台3.2 MV低电感Marx发生器和四路同轴水介质线组成。每台Marx同时给两路脉冲形成线(特征阻抗6 Ω、电气长度30 ns)充电,充电峰值时间约370 ns。每路水介质线采用两级脉冲压缩,为感应腔馈入约1 MV/160 kA/60 ns电脉冲。电触发SF6气体开关、自击穿水开关分别用作主同步开关和脉冲陡化开关。感应电压叠加器采用四级1.5 MV感应腔串联,每级感应腔采用单点馈入结构。次级采用真空绝缘传输线实现电压叠加和功率传输,特征阻抗由30 Ω线性增大至120 Ω。采用4 MV电压下综合性能较优的RPD来产生强脉冲X射线。装置目前达到技术指标:输出电压4.3 MV、脉冲前沿(10%~90%) 21 ns、半高宽约70 ns、二极管电流85 kA,X射线半高宽约55 ns,整机延时(从Marx触发器输出到X射线产生)约749 ns,标准偏差约7 ns。当RPD阳极采用直径2 mm钨针时,正前方1 m处剂量约15.5 rad(LiF),正向焦斑约1.4 mm。
  • 图  1  4 MV脉冲X射线闪光照相装置“剑光二号”

    Figure  1.  4 MV IVA facility developed for flash X-ray radiography

    图  2  水介质传输线示意图

    Figure  2.  Cutoff view of a deionized-water coaxial line

    图  3  “剑光二号”感应腔

    Figure  3.  Illustration of cavity used in Jianguang-II

    图  4  末级感应腔电势分布

    Figure  4.  Potential distribution in the last cavity

    图  5  “剑光二号”真空传输线示意图

    Figure  5.  Sketch of the vacuum transmission line for the Jianguang-II facility

    图  6  实测前级脉冲源输出波形

    Figure  6.  Measured outputs of the prime power source

    图  7  装置输出电压和二极管电流

    Figure  7.  Measured IVA output voltage and diode current

    图  8  基于电感修正方法获得二极管电压

    Figure  8.  Diode voltage based on the inductive correction

    图  9  二极管动态阻抗和X射线波形

    Figure  9.  Calculated dynamic impedance of RPD and measured X-ray waveforms

    图  10  针孔成像法测量X射线焦斑

    Figure  10.  Original image of the X-ray spot obtained by pinhole imaging technique

    表  1  装置连续10发次实验主要输出指标

    Table  1.   Key output parameters of the Jianguang-II facility over a ten shot sequence

    shotoutput voltage/MVrisetime/nsdiode current/kAX-ray FWHM time/nsdose@1 m/rad(LiF)delay time/ns
    2019-0174.32285.35814.8748
    2019-0184.62484.15415.7749
    2019-0194.52085.65616.0748
    2019-0204.52080.55414.5745
    2019-0214.42486.25616.1740
    2019-0223.92084.95814.2741
    2019-0234.52184.25315.6748
    2019-0244.21987.05215.4756
    2019-0254.31788.05216.9756
    2019-0264.22182.55215.4762
    average4.3±0.221±2.184.8±2.255±2.415.5±0.8749±7
    下载: 导出CSV

    表  2  剑光一号和剑光二号装置输出指标的比较

    Table  2.   Comparation of output parameters between the Jianguang-I and Jianguang-II facilities

    output voltage/MV diode current/kA X-ray FWHM time/ns radiated dose @1 m/rad(LiF) spot diameter/mm
    Jianguang-I facility 2.4 51 46 3.7 1
    Jianguang-II facility 4.3 85 55 15.5 1.4
    下载: 导出CSV
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出版历程
  • 收稿日期:  2019-09-03
  • 修回日期:  2019-10-30
  • 刊出日期:  2019-12-26

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