质子照相磁透镜的优化设计  

Optimization research on image lens of proton radiography

作　　者：何小中[1] 杨国君[1] 刘承俊[1] 

机构地区：[1]中国工程物理研究院流体物理研究所,四川绵阳621900

出　　处：《强激光与粒子束》2008年第2期297-300,共4页High Power Laser and Particle Beams

基　　金：国家自然科学基金委员会与中国工程物理研究院联合基金资助课题(10576006)

摘　　要：对质子照相系统中Zumbro磁透镜的参数进行了优化,使成像系统造成的图像模糊最小化,结果表明:构成Zumbro磁透镜的四极透镜对内外漂移段长度相等时,成像系统获得最小的图像模糊。对成像系统的视场进行了分析,表明视场对Zumbro透镜的参数不敏感。给出了质子能量为20 GeV时Zumbro透镜的参数,Geant4蒙特卡罗计算表明:所给的Zumbro透镜参数能正确成像。Parameters of Zumbro lens are optimized to minimize the image blur. When the length of outer drift equals to the length of inner drift, the image blur is minimized or is very close to the minimum. Field of view of Zumbro lens is also investigated, which is not sensitive to parameters of Zumbro lens and is close to two thirds of the aperture of quadrupole magnet. Parameters of a Zumbro lens for 20 GeV proton radiography are presented. Geant4 simulation resluts show that the parameters are valid.

关 键 词：质子照相 磁透镜 优化 视场 

分 类 号：O434.1[机械工程—光学工程]