快前沿紧凑型X光机研制

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。

Compact fast raising-edge X-ray system

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.