An ellipsoidal time detector with PMT readout  

作　　者：LI Jiaxing LIU Pingping WANG Jiansong XIAO Guoqing GUO Zhongyan HU Zhengguo MAO Ruishi SUN Zhiyu XU Hushan ZHAN Wenlong 

机构地区：[1]School of Physical Science and Technology, Southwest University, Chongqing 400715, China [2]Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China

出　　处：《Nuclear Science and Techniques》2009年第4期248-250,共3页核技术（英文）

基　　金：Supported by National Nature Science Foundation of China (No.10205019,10475098);Doctoral Foundation of Southwest University (No.SWNUB2005028);Hundred Talent Project of CAS (0501080BR0)

摘　　要：In this paper we present a timing detector which has low detection threshold and is radiation-resistant.The photons induced by radioactive beam ions passing through a thin plastic-scintillator foil BC422,emit from the foil center corresponding to one focal point of an aluminum ellipsoidal mirror and are reflected to another focus point at which the cathode of a photomultiplier tube locates.A time resolution of about 115 ps can be achieved for1 2N of 58.5 MeV/u and 130 ps for1 7B of 43.7 MeV/u.The counting rate up to 10 8packets per second(pps) is allowed.In this paper we present a timing detector which has low detection threshold and is radiation-resistant. The photons induced by radioactive beam ions passing through a thin plastic-scintillator foil BC422, emit from the foil center corresponding to one focal point of an aluminum ellipsoidal mirror and are reflected to another focus point at which the cathode of a photomultiplier tube locates. A time resolution of about 115 ps can be achieved for 12N of 58.5 MeV/u and 130 ps for 17B of 43.7 MeV/u. The counting rate up to 108 packets per second （pps） is allowed.

关 键 词：PMT 光量子 放射性 原子核物理学 

分 类 号：O57[理学—粒子物理与原子核物理]