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1 MV X光机系统可靠性实验研究

马成刚 李洪涛 邓明海 曹宁翔 莫腾富 王晓 张志强

马成刚, 李洪涛, 邓明海, 等. 1 MV X光机系统可靠性实验研究[J]. 强激光与粒子束, 2020, 32: 025018. doi: 10.11884/HPLPB202032.190378
引用本文: 马成刚, 李洪涛, 邓明海, 等. 1 MV X光机系统可靠性实验研究[J]. 强激光与粒子束, 2020, 32: 025018. doi: 10.11884/HPLPB202032.190378
Ma Chenggang, Li Hongtao, Deng Minghai, et al. Experimental research on reliability of 1 MV X-ray system for radiography[J]. High Power Laser and Particle Beams, 2020, 32: 025018. doi: 10.11884/HPLPB202032.190378
Citation: Ma Chenggang, Li Hongtao, Deng Minghai, et al. Experimental research on reliability of 1 MV X-ray system for radiography[J]. High Power Laser and Particle Beams, 2020, 32: 025018. doi: 10.11884/HPLPB202032.190378

1 MV X光机系统可靠性实验研究

doi: 10.11884/HPLPB202032.190378
详细信息
    作者简介:

    马成刚(1977—),男,高级工程师,主要研究方向为脉冲功率技术及应用研究;macg2@21cn.com

    通讯作者:

    邓明海(1984—),男,助研,主要研究方向为脉冲功率技术及应用研究;dmh@caep.cn

  • 中图分类号: TL65;TM89

Experimental research on reliability of 1 MV X-ray system for radiography

  • 摘要: 参考“天蝎-Ι”原型机,重新设计了1 MV X光机系统,根据技术指标可靠性要求,对Marx发生器、场畸变开关、脉冲传输线、脉冲形成线及二极管等进行了可靠性设计。针对新设计的1 MV X光机系统,对其可靠性进行了实验研究,包含1 MV X光机系统的时间抖动和出光剂量稳定性等,根据调试实验结果制定1 MV X光机系统操作规程,按照规程对1 MV X光机系统进行了可靠性考核,连续工作81发次,最大时间抖动为146 ns,剂量为0.75~1.40 R @1 m,满足总体技术指标要求,可靠度达到98%。
  • 图  1  1 MV X光机主机系统示意图

    Figure  1.  Schematic illustration of the 1 MV X-ray system

    图  2  1 MV X光机主机系统实物图

    Figure  2.  Photo of the 1 MV X-ray system

    图  3  开关导通时延统计图

    Figure  3.  Experimental results of switch jitter

    图  4  开关自击穿电压统计图

    Figure  4.  Experimental results of switch self-breakdown voltage

    图  5  真空室绝缘隔板沿面闪络图片

    Figure  5.  Photo of the flashover on insulator

    图  6  系统出光延时时间分布图

    Figure  6.  Time jitter of the 1 MV X-ray system

    图  7  系统输出剂量分布图

    Figure  7.  Dose at 1 m right in front of the 1 MV X-ray system

    表  1  设计参数表

    Table  1.   Design parameters

    geometrical parameterselectrical parameters
    Marx generator dimensions:~2 970 mm×1 690 mm×1 000 mm;
    switch gap:23 mm±0.2 mm
    9 stage; capacitor:100 kV/0.4 μF; charge voltage:
    ±58 kV; number of capacitor:18; k≈0.6
    pulse forming line inner diameter of the outer conductor:614 mm; outer diameter of the inner conductor:292 mm; L≈1 m equivalent capacitor:6 nF; impedance:5 Ω; k≈0.6
    oil switch switch gap≈26 mm /
    pulse transmission line inner diameter of the outer conductor:614 mm; outer diameter of the inner conductor:76 mm; L≈1.34 m equivalent capacitor:2.9 nF; impedance:14 Ω; k≈0.6
    rod-pinch diode diameter of the graphite cathode hole:12 mm; thickness:3 mm; diameter of the tungsten anode rod:1.5 mm; outer dimension~11 mm design impedance:40 Ω
    oil transmission line inner diameter of the outer conductor:320 mm; outer diameter of the inner conductor:102 mm; L≈2 m impedance:45 Ω; k≈0.6
    下载: 导出CSV

    表  2  可靠性措施表

    Table  2.   Measurements of the reliability

    \failure modeaction
    hardware designoil transmission line,pulse transforming line and pulse transmission line electric breakdownconservative electrical stress design, k≈0.6
    Marx generation electrical breakdownconservative Marx generation electrical stress design
    Marx generation trigger reliabilitypulse transformer trigger mode,output voltage up to double capacitor charge voltage,rise time less than 70 ns
    diode insulator and structure coherencerobust electrode design and vacuum system design,assistant system
    procedural designinspector before testspecific parameters of oil,water,vacuum and diode;special check table
    operation in testspecial operation order and time
    operation after testspecific test recorder and analysis,find hidden failure
    下载: 导出CSV

    表  3  1 MV X光机系统与Cygnus工作情况对比表

    Table  3.   Performance contrast of the 1 MV X-ray system and Cygnus systems

    working shotsfailure shots
    Cygnus11642
    Cygnus21714
    1 MV X-ray system2410
    下载: 导出CSV
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    [2] 吴红光, 王晓, 李玺钦, 等. 300 kV高压脉冲发生器[J]. 强激光与粒子束, 2012, 24(3):715-718. (Wu Hongguang, Wang Xiao, Li Xiqin, et al. 300 kV high-voltage pulse generator[J]. High Power Laser and Particle Beams, 2012, 24(3): 715-718
    [3] 吴红光, 马成刚, 冯元伟, 等. 450 kV数字化X光照相诊断系统[J]. 强激光与粒子束, 2016, 28:014003. (Wu Hongguang, Ma Chenggang, Feng Yuanwei, et al. 450 kV digital X-ray diagnostic system[J]. High Power Laser and Particle Beams, 2016, 28: 014003
    [4] 孙凤举, 邱爱慈, 杨海亮, 等. 感应电压叠加器驱动阳极杆箍缩二极管型脉冲X射线源[J]. 强激光与粒子束, 2010, 22(4):936-940. (Sun Fengju, Qiu Aici, Yang Hailiang, et al. Pulsed X-ray source based on inductive voltage adder and rod pinch diode for radiography[J]. High Power Laser and Particle Beams, 2010, 22(4): 936-940
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    Zeng Zhengzhong. Introduction of pulsed power technology. Xi′an: Shaanxi Technology Press, 2003
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    [10] 李洪涛, 丁伯南, 谢卫平, 等. 200 kV/100 kA低抖动环轨式场畸变开关[J]. 高电压技术, 2003, 29(9):33-35. (Li Hontao, Ding Bonan, Xie Weiping, et al. A study on the 200 kV/100 kA low jitter ring rail electrode field distortion switch[J]. High Voltage Engineering, 2003, 29(9): 33-35 doi: 10.3969/j.issn.1003-6520.2003.09.015
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出版历程
  • 收稿日期:  2019-09-23
  • 修回日期:  2019-10-30
  • 刊出日期:  2019-12-26

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