Image blur in high energy proton radiography  

作　　者：魏涛 杨国君 龙继东 石金水 

机构地区：[1]Institute of Fluid Physics, China Academy of Engineering Physics

出　　处：《Chinese Physics C》2013年第6期100-105,共6页中国物理C（英文版）

基　　金：Supported by National Natural Science Foundation of China(11205144).National Natural Science Foundation of China(11176001);Science and Technology Development Program of China Academy of Engineering Physics(2010A042016)

摘　　要：Proton radiography has provided a potential development direction for advanced hydrotesting, and its image blur is a crucial point that needs to be deeply studied. In this article, numerical simulation by using the Monte Carlo code Geant4 has been implemented to investigate the entire physics mechanism of high energy proton beam travelling through the object and beamline and arriving at the image plane. This article will mainly discuss the various factors which cause the image blur, including the chromatic aberration of the imaging beamline, the insumcient modulation of an incident particle＇s transverse displacement and angle deviation, the longitudinal length of an object, the influence of containment vessel and otherwise.Proton radiography has provided a potential development direction for advanced hydrotesting, and its image blur is a crucial point that needs to be deeply studied. In this article, numerical simulation by using the Monte Carlo code Geant4 has been implemented to investigate the entire physics mechanism of high energy proton beam travelling through the object and beamline and arriving at the image plane. This article will mainly discuss the various factors which cause the image blur, including the chromatic aberration of the imaging beamline, the insumcient modulation of an incident particle＇s transverse displacement and angle deviation, the longitudinal length of an object, the influence of containment vessel and otherwise.

关 键 词：proton radiography image blur chromatic aberration SCATTERING containment vessel 

分 类 号：O572.341[理学—粒子物理与原子核物理]