CAJ | 학술논문

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%.
본문건립료기우계산궤모의적몽특잡라유한원사선추적법,응용해방법대불동결구척촌적원주형LSO정체화대심경광섬우합수출진행료모의연구.모의결과표명:섬삭체반경일정정황하,우합공솔증가적폭도수섬삭체후도증가정체감추세,재섬삭체적후도체도10 cm시증가섬삭체후도,우합공솔증가추우평완;섬삭체후도일정적정황하,재섬삭체적반경체도광섬입체각대응적반경후,계속증가반경,우합공솔증가폭도축점감소;재섬삭체적입사단면포95%적반사재료후,기우합공솔증가료90%.
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 scintillator'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 scintillator's incident surface was coated with high reflecting material of 95% reflectance,coupled power increase by 90%.