Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2019 Impact factor 1.556

Nuclear Science and Techniques ›› 2009, Vol. 20 ›› Issue (4): 248-250 doi: 10.13538/j.1001-8042/nst.20.248-250

• NUCLEAR, HEAVY ION AND ATOMIC PHYSICS • Previous Articles     Next Articles

An ellipsoidal time detector with PMT readout

LI Jiaxing1,* LIU Pingping1 WANG Jiansong2 XIAO Guoqing2 GUO Zhongyan2 HU Zhengguo2 MAO Ruishi2 SUN Zhiyu2 XU Hushan2 ZHAN Wenlong2   

  1. 1 School of Physical Science and Technology, Southwest University, Chongqing 400715, China 2 Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
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LI Jiaxing, LIU Pingping, WANG Jiansong, XIAO Guoqing, GUO Zhongyan. An ellipsoidal time detector with PMT readout.Nuclear Science and Techniques, 2009, 20(4): 248-250     doi: 10.13538/j.1001-8042/nst.20.248-250


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.

Key words: Time of flight, Ellipsoidal mirror focusing, RIBLL (Radioactive Ion Beam Line in Lanzhou)