150kV脉冲X射线测试系统  

150-kV pulsed X-ray test system

作　　者：吴红光[1] 李玺钦[1] 刘金锋[1] 冯元伟[1] 王晓[1] 丁明军[1] 

机构地区：[1]中国工程物理研究院流体物理研究所中国工程物理研究院脉冲功率科学与技术重点实验室,四川绵阳621900

出　　处：《强激光与粒子束》2015年第6期267-271,共5页High Power Laser and Particle Beams

摘　　要：基于Marx发生器原理设计了150kV脉冲X射线测试系统,该系统采用正负极充电的双边Marx发生器线路,Marx发生器设计为15级同轴结构,采用紧凑低电感设计来获得窄脉冲的输出。实验结果表明,X光机设计合理,获得了窄脉宽、高幅度的高压脉冲输出:在充电电压为20kV的情况下,X射线管电压150kV;X射线脉宽约60ns;25cm处剂量约7.8×10-6 C/kg;焦斑直径2.5mm。搭配计算机X射线摄影系统,成像面积可达30cm×40cm,分辨力大于1lp/mm,可以满足一般低能闪光照相的需要。A 150 kV pulsed X-ray test system is designed according to the principle of bipolar charged Marx generator. It is mainly used for ballistics studies, impact studies and fluid dynamics simulation of weapons in flash photography. A 15-stage Marx generator is designed in coaxial structure and used in the pulse generator to shorten the pulse width of output pulses. Marx gener- ator connects with the flash X-ray tube through a high-voltage cable. For a charging voltage of 20 kV per stage,the Marx genera- tor generates a more than 150 kV pulse voltage that is applied to the X-ray tube. The X-ray tube generates a dose 7.8×10-6 C/ kg at 0.25 m away for flash X-radiography with a pulse width of 60 ns. The size of X-ray source is 2.5 ram. 150 kV pulsed X-ray test system used with computed radiographic system be able to an imaging area of up to 30 cm×40 cm, resolution is greater than 1 lp/mm for X-ray image . It is the ideal tool for high-speed radiation photography.

关 键 词：闪光照相 MARX发生器 X射线管 脉宽 计算机X射线摄影系统 

分 类 号：TM89[电气工程—高电压与绝缘技术]