| X光二极管实验平台初步设计 |
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| 引用本文： | 马勋,邓建军,计策,丰树平,王勐,刘宏伟.X光二极管实验平台初步设计[J].强激光与粒子束,2015,27(5):055006. |
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| 作者姓名： | 马勋 邓建军 计策 丰树平 王勐 刘宏伟 |
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| 作者单位： | 1.中国工程物理研究院 流体物理研究所, 中物院脉冲功率科学与技术重点实验室, 四川 绵阳 621 900 |
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| 摘 要： | 采用Marx发生器结合水介质同轴线设计了高压脉冲功率源,在X射线二极管负载上可产生数MV高压输出。通过电压波过程分析,给出了在负载上获得最大电压输出条件下的形成线、传输线的阻抗设计原则。通过集中参数电路模型分析,给出了一定预脉冲幅值下形成线、传输线电长度及中储设计原则。结合水介质正极性耐压Martin经验公式进行绝缘设计,二极管采用径向均压绝缘堆结构,给出了整个装置初步方案设计。基于Pspice的全系统电路模拟表明:当中储运行电压为2.6MV时,对3Ω形成线充电电压为3.3MV,并最终在40Ω负载上获得4MV电压输出,且充电过程中负载脉冲幅值约为形成线充电电压的1.2%,在现有条件下,该平台设计指标能够满足实验预期。
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| 关 键 词： | 闪光X光机 脉冲功率源 水介质同轴线 径向均压绝缘堆 闪光照相 |
| 收稿时间： | 2014-12-09 |
Design of pulsed power source driving flash X-ray diodes |
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| Institution: | 1.Key Laboratory of Pulsed Power,Institute of Fluid Physics,CAEP,P.O.Box 919-108,Mianyang 621900,China |
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| Abstract: | Flash X-ray generator comprises a pulsed power driver and a diode. Pulse forming line (PFL) and transmission line are utilized to generate high voltage with several MV on diode, and the function of the latter is to compress the pulse rise time and match the impedance of PFL to diodes. Impedance and capacitance of these coaxial lines are calculated to get the highest voltage and certain pre-pulse on load, respectively. Configuration of diode insulators are designed based on radial grading rings, and the layout of a flash X-ray generator is proposed. The results show that a voltage of 4 MV is generated on 40 load when 2.6 MV and 3.3 MV voltage charging to immediate storage energy and PFL, respectively. Meanwhile the pre-pulse is about 1.2% of charging voltage to PFL. |
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