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 than70mm,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.
出处
《强激光与粒子束》
EI
CAS
CSCD
北大核心
2016年第1期17-21,共5页
High Power Laser and Particle Beams
