束流实验中不同尺寸塑料闪烁体的时间特性(英文)  

Timing Performance of Plastic Scintillators of Various Sizes in a Beam Test

作　　者：赵力[1] 衡月昆[2] 吴冲[2] 赵小健[2] 孙志嘉[2] 吴金杰[2] 蒋林立[1] 赵玉达[2] 王凤梅[3] 王贻芳[2] 张子平[1] 

机构地区：[1]中国科学技术大学近代物理系,合肥230026 [2]中国科学院高能物理研究所,北京100049 [3]郑州大学工程物理系,郑州450052

出　　处：《高能物理与核物理》2006年第6期554-558,共5页High Energy Physics and Nuclear Physics

基　　金：北京正负电子对撞机重大改造工程项目,中国科学院知识创新基金(U-602和U-34)国家自然科学基金(10491305,10225524)资助~~

摘　　要：北京谱仪(BESⅢ)中的飞行时间探测器将采用长2．3m宽6cm的长条形塑料闪烁体．利用北京高能物理研究所的实验束流对铝膜包装的不同厚度闪烁体的本征时间分辨进行了研究,给出了4cm,5cm和6cm闪烁体的时间分辨,而且用蒙特卡罗模拟做了比较,结果表明5cm厚的闪烁体具有最佳性能．The time-of-flight detector of the Beijing Spectrometer Ⅲ（BESⅢ） is built with long and narrow plastic scintillator bars, with each being 2.3m long and 6cm wide. The time resolution of prototypes wrapped with aluminum film has been studied for various thickness of the scintillator using a test beam at the Institute of High Energy Physics in Beijing, China. In this paper, the position-dependent time resolution of the scintillator with a thickness of 4cm, 5cm and 6cm is presented and compared with a Monte Carlo simulation, the results show that the bar with a thickness of 5cm has the best performance.

关 键 词：时间分辨率 飞行时间 北京谱仪Ⅲ 闪烁体 蒙特卡罗 

分 类 号：O572.213[理学—粒子物理与原子核物理]