Abstract:
This paper analyzes the characteristics of the scintillator detectors which have been widely used in high energy X-ray industrial computed tomography (ICT) currently, and shows the shortcomings of traditional gas detectors. To solve these problems, a new gas detector which makes use of metal slab as X-ray convertor and the gas electron multiplier as electron amplifier was investigated based on the profound analysis of the theory about the mutual action between radiation and substance. In the end, the EGSnrc Monte-Carlo simulation code on the Linux platform to simulate the transport course of photon and secondary electron in the detector was utilized. This result proves that the detector has higher efficiency and lesser volume, and can take place of those traditional scintillator detectors of high energy X-ray ICT in theory.