留言板

尊敬的读者、作者、审稿人, 关于本刊的投稿、审稿、编辑和出版的任何问题, 您可以本页添加留言。我们将尽快给您答复。谢谢您的支持!

姓名
邮箱
手机号码
标题
留言内容
验证码

一台基于串级二极管技术的高强度脉冲硬X射线源

来定国 邱孟通 杨实 苏兆锋 徐启福 丛培天 任书庆

来定国, 邱孟通, 杨实, 等. 一台基于串级二极管技术的高强度脉冲硬X射线源[J]. 强激光与粒子束, 2021, 33: 035001. doi: 10.11884/HPLPB202133.200269
引用本文: 来定国, 邱孟通, 杨实, 等. 一台基于串级二极管技术的高强度脉冲硬X射线源[J]. 强激光与粒子束, 2021, 33: 035001. doi: 10.11884/HPLPB202133.200269
Lai Dingguo, Qiu Mengtong, Yang Shi, et al. An intense pulsed hard X-ray source based on series diode technology[J]. High Power Laser and Particle Beams, 2021, 33: 035001. doi: 10.11884/HPLPB202133.200269
Citation: Lai Dingguo, Qiu Mengtong, Yang Shi, et al. An intense pulsed hard X-ray source based on series diode technology[J]. High Power Laser and Particle Beams, 2021, 33: 035001. doi: 10.11884/HPLPB202133.200269

一台基于串级二极管技术的高强度脉冲硬X射线源

doi: 10.11884/HPLPB202133.200269
详细信息
    作者简介:

    来定国(1980—),男,副研究员,从事脉冲功率技术研究;317337224@qq.com

  • 中图分类号: M386

An intense pulsed hard X-ray source based on series diode technology

  • 摘要: 介绍了利用串级二极管产生高强度脉冲硬X射线的方法及其辐射场参数。以“闪光二号”加速器为平台,通过适应性改造,产生快前沿电压脉冲;研制了两级阻抗1 Ω串级二极管,通过串联分压降低二极管端电压、各级二极管电子束独立打靶在空间叠加形成高强度均匀辐射场。解决了悬浮电极绝缘支撑、二极管阴极均匀发射等技术难题,实现了串级二极管的稳定工作。在总电压约700 kV、电流约310 kA条件下,X射线平均能量87 keV,500 cm2上的平均能注量36 mJ/cm2,剂量均匀性(最大值比最小值)达到2∶1。
  • 图  1  X射线源系统组成

    Figure  1.  Structure of the X ray source

    图  2  脉冲功率源典型输出电压波形

    Figure  2.  Typical voltage waveform of the power source

    图  3  串级二极管结构

    Figure  3.  Structure of the series diode

    图  4  悬浮电极支撑系统工作过程

    Figure  4.  Operation process of floating cathode support system

    图  5  悬浮电极支撑针收缩过程

    Figure  5.  Retracting process of the support pins

    图  6  阴极结构和不同时刻的等离子体图像

    Figure  6.  Cathode structure and cathode plasma images at different time

    图  7  阴极环尺寸比例对辐射均匀性的影响

    Figure  7.  X ray uniformity at different radii ratio

    图  8  串级二极管束斑图像

    Figure  8.  Time-integrated pinhole camera image of the series diode

    图  9  串级二极管电压电流和的X射线脉冲波形

    Figure  9.  Series diode voltage, current and X ray waveform of typical experiment

    图  10  串级二极管和单间隙二极管X射线能谱

    Figure  10.  X ray spectrum of the series diode and single diode

    图  11  靶后5 cm处X射线剂量分布曲线和面分布

    Figure  11.  X-ray dose distribution over the area at 5 cm from last convertor

    表  1  连续5次实验二极管电压电流和X射线参数

    Table  1.   Experimental data of five consecutive shots

    shot No.voltage/
    kV
    current/
    kA
    X ray rise
    time/ns
    FWHM/
    ns
    average dose/
    rad(Si)
    average fluence/
    mJ·cm−2
    X ray average
    energy/keV
    uniformity
    04269730227.255.631436.586.71.7:1
    04368631425.252.830535.587.82.0:1
    04472133426.560.432237.489.61.9:1
    04570130728.258.731837.086.72.0:1
    04669830825.152.430335.282.11.7:1
    statistics701±8313±926.4±1.056.0±2.8312±6.836.3±0.986.6±1.8
    下载: 导出CSV
  • [1] Ware K D, Bell D E, Gullickson R L, et al. Evolving approaches to pulsed X-ray sources[J]. IEEE Trans Plasma Sci, 2002, 30(5): 1733-1741. doi: 10.1109/TPS.2002.805376
    [2] Higgins D F, Lee K S H, Marin L. System-generated EMP[J]. IEEE Transactions on Electromagnetic Compatibility, 1978, 20(1): 14-22.
    [3] Cook D. New developments and applications of intense pulsed radiation sources at Sandia National Laboratories[C]//11th IEEE International Pulsed Power Conference. 1997: 25-36.
    [4] Meachum J, Riordan J, Sincerny P, et al. Triple series diode development[R]. DNA-TR-92-200-V1, 1997.
    [5] Weber B V, Commisso R J, Cooperstein P, et al. Reflex triode X-ray source research on Gamble II[C]//IEEE International Pulsed Power Conference. 2007: 1417-1422.
    [6] Murphy D P, Weber B V, Swanekamp S B, et al. High-current reflex triode research[C]//18th IEEE International Pulsed Power Conference. 2011: 1459-1464.
    [7] 蒯斌, 邱爱慈, 王亮平, 等. 强脉冲超硬X射线产生技术研究[J]. 强激光与粒子束, 2005, 17(11):1740-1743. (Kuai Bin, Qiu Aici, Wang Liangping, et al. Generation of intense pulsed super-hard X-ray[J]. High Power Laser and Particle Beams, 2005, 17(11): 1740-1743
    [8] 来定国, 张永民, 李进玺, 等. 强流电子束轫致辐射复合薄靶设计[J]. 强激光与粒子束, 2013, 25(6):1396-1400. (Lai Dingguo, Zhang Yongmin, Li Jinxi, et al. Design of bremsstrahlung composite thin converter for high current electron beams[J]. High Power Laser and Particle Beams, 2013, 25(6): 1396-1400 doi: 10.3788/HPLPB20132506.1396
    [9] 樊亚军, 石磊, 邱爱慈. 相对论电子束在角向磁场中产生硬X射线的实验研究[J]. 强激光与粒子束, 2002, 14(6):929-932. (Fan Yajun, Shi Lei, Qiu Aici. Experimental study on hard X-ray generation of relativistic electron beams in azimuthal magnetic field[J]. High Power Laser and Particle Beams, 2002, 14(6): 929-932
    [10] 来定国, 邱孟通, 徐启福, 等. 串级二极管工作过程的电路分析[J]. 强激光与粒子束, 2016, 28:015025. (Lai Dingguo, Qiu Mengtong, Xu Qifu, et al. Circuit analysis of series diode working process[J]. High Power Laser and Particle Beams, 2016, 28: 015025 doi: 10.11884/HPLPB201628.015025
    [11] Lai Dingguo, Qiu Mengtong, Xu Qifu, et al. Space-charge-limited currents for cathodes with electric field enhanced geometry[J]. Physics of Plasmas, 2016, 23: 083104. doi: 10.1063/1.4959865
    [12] 苏兆峰, 邱孟通, 来定国, 等. 脉冲硬X射线能注量测量系统结构设计[J]. 强激光与粒子束, 2016, 28:014006. (Su Zhaofeng, Qiu Mengtong, Lai Dingguo, et al. Structural design of fluence measurement system for pulse hard X-ray[J]. High Power Laser and Particle Beams, 2016, 28: 014006 doi: 10.11884/HPLPB201628.014006
  • 加载中
图(11) / 表(1)
计量
  • 文章访问数:  106
  • HTML全文浏览量:  35
  • PDF下载量:  14
  • 被引次数: 0
出版历程
  • 收稿日期:  2020-09-22
  • 修回日期:  2020-11-24
  • 网络出版日期:  2021-03-30
  • 刊出日期:  2021-03-05

目录

    /

    返回文章
    返回