Monte Carlo有限元射线追迹法计算圆柱形闪烁体与光纤的耦合功率  

Calculation of Light Power Coupled from a Cylindrical Scintillator into Optical Fiber Using Monte Carlo Ray Tracing Method

作　　者：张美[1] 盛亮[1] 邱孟通[1] 王奎禄[1] 魏福利[1] 彭博栋[1] 王培伟[1] 李阳[1] 

机构地区：[1]西北核技术研究所,陕西西安710024

出　　处：《核电子学与探测技术》2009年第6期1504-1508,共5页Nuclear Electronics & Detection Technology

摘　　要：本文建立了基于计算机模拟的蒙特卡罗有限元射线追迹法,应用该方法对不同结构尺寸的圆柱型LSO晶体和大芯径光纤耦合输出进行了模拟研究。模拟结果表明:闪烁体半径一定情况下,耦合功率增加的幅度随闪烁体厚度增加呈递减趋势,在闪烁体的厚度达到10 cm时增加闪烁体厚度,耦合功率增加趋于平缓;闪烁体厚度一定的情况下,在闪烁体的半径达到光纤立体角对应的半径后,继续增加半径,耦合功率增加幅度逐渐减少;在闪烁体的入射端面包95%的反射材料后,其耦合功率增加了90%。An numerical model based on a Monte Carlo finite element Ray-tracing approach was set up to stimulate light collection from LSO scintillator with different structure parameter into a large-core fiber. The stimulation results show that. when radii of LSO is constant, the rate of increase of coupled power is decrease with maximizing maximizing the LSO＇ s length and when scintiUator＇s length is greater than 10 cm, coupled power increases slow; when Length of LSO is constant and radii of LSO is in excess of the radii identifined by fiber inclination, trend of coupled power curve become flat with the increase of radii of LSO; when scintillators incident surface was coated with high reflecting material of 95% reflectance , coupled power increase by 90%.

关 键 词：MONTE CARLO方法 有限元射线追迹法 耦合功率 

分 类 号：O411[理学—理论物理] TL812[理学—物理]