450kV数字化X光照相诊断系统  

450kV digital X-ray diagnostic system

作　　者：吴红光[1] 马成刚[1] 冯元伟[1] 朱鹏飞[1] 王晓[1] 李玺钦[1] 

机构地区：[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621900

出　　处：《强激光与粒子束》2016年第1期17-21,共5页High Power Laser and Particle Beams

摘　　要：介绍了450kV数字化X光照相诊断系统的研制，该系统由450kV脉冲X光机和抗辐照X光CCD相机组成。450kV脉冲X光机输出的X射线脉冲半高宽为40ns，1m处剂量为5．2×10^-6C／kg，焦斑2～5mm，2．5m处可穿透20mm的Fe。抗辐照X光CCD相机接收X光能谱范围为1O～450keV，有效成像面积最高可达100mm×100mm，空间分辨率最高可达3lp／mm，具有很强的抗电磁干扰能力。进行爆轰实验时在总防护为40mm铝板的情况下，450kV数字化X光照相诊断系统的照相视场可视范围超过Ф70mm，空间分辨率优于1．2lp／mm。This paper introduces a 450 kV digital X-ray diagnostic system composed of a 450 kV pulsed X-ray system and an anti-radiation X-ray CCD camera.The 450 kV pulsed X-ray system is designed according to the principle of bipolar charged Marx generator.The Marx generator is designed in coaxial structure,and low jitter field-distortion switches,isolation inductance and ceramic capacitors are used in the pulse generator to shorten pulse width of output pulse.The generator is connected with an X-ray tube through a high-voltage cable.For a charging voltage of 35 kV per stage,the Marx generator generates a more than 450 kV pulse voltage that is applied to the X-ray tube.The X-ray tube generates a dose of 5.2×10-6 C/kg at 1maway for the flash X-radiography with pulse width of 40 ns.The size of X-ray source is 2-5mm,the anti-radiation X-ray CCD camera receives the X-ray spectrum within the range of 10-450 keV,the effective imaging area is up to 100mm×100mm,and the spatial resolution is up to3lp/mm.The experiment results show that the 450 kV digital X-ray diagnostic system has an imaging area no less than70mm,resolution greater than 1.2lp/mm under the protection of 40 mm thick aluminium plate.It is the ideal tool for high-speed radiation photography.

关 键 词：闪光照相 X光机 MARX发生器 脉冲宽度 CCD相机 

分 类 号：TM89[电气工程—高电压与绝缘技术]