| 快前沿紧凑型X光机研制 |
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| 引用本文： | 吴红光,丁明军,赵延安,冯元伟,王晓,李玺钦.快前沿紧凑型X光机研制[J].强激光与粒子束,2014,26(5):055005-276. |
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| 作者姓名： | 吴红光 丁明军 赵延安 冯元伟 王晓 李玺钦 |
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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, 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： | 介绍了一种基于Marx发生器原理设计的快前沿紧凑型X光机,采用Marx发生器直接驱动X射线管的线路设计,封装在一个直径约为15 cm、长约1.2 m的不锈钢圆筒内。Marx发生器设计为15级单极性同轴结构,利用锐化开关与屏蔽外筒间的杂散电容来减小脉冲前沿,同时采用紧凑低电感设计来获得窄脉冲的输出。Marx发生器最大储能90 J,在充电电压为30 kV的情况下,75Ω负载上获得了前沿10 ns、脉宽40 ns、幅度360 kV的高压脉冲。实验结果表明X光机设计合理,实现了设备小型化目标,获得了快前沿高幅度的高压脉冲。研制的X光机的主要的参数为:脉宽35 ns;0.3 m处剂量约2.58×10~(-5)C/kg;焦斑2 mm。
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| 关 键 词： | X光机 Marx发生器 X射线管 快前沿 脉冲功率技术 |
| 收稿时间： | 2013/10/8 |
Compact fast raising-edge X-ray system |
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| Affiliation: | 1.Key Laboratory of Pulsed Power,Institute of Fluid Physics,CAEP,P.O.Box 919-107,Mianyang 621900,China |
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| Abstract: | A compact fast raising-edge X-ray system is designed according to the principle Marx generator. Marx and X-ray tube are integrally designed , and both of them are encapsulated in a stainless steel barrel of diameter of 15 cm, length 1.2 m. Marx generator is designed based on wave erection principle that has 15-stage, theoretical energy of 90 J and theoretical output voltage of 600 kV in coaxial structure. For a charging voltage of 30 kV per stage, the raising time of output pulse is below 10 ns at 360 kV into a 75 load with 40 ns pulse width. With a flash X-ray tube integrated directly into the generator as a load, the formed flash X-ray system could generate a dose of 2.5810-5 C/kg at 30 cm away for flash X-radiography with pulse width 35 ns. The size of x-ray source is 2 mm. The X-ray system has a stable performance, and it is easy to operate. It is the ideal tool for high-speed radiation photography. |
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| Keywords: | X-ray system Marx generator X-ray tube fast raising-edge pulsed power technology |
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