Chinese Physics C > 2006, Vol. 30 > Issue(6): 554-558

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

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China2 Institute of High Energy Physics, CAS, Beijing 100049, China3 Department of Physics, Nanjing University, Nanjing 210093, China4 Institute of Engineering Physics, Zhengzhou University, Zhengzhou 450052, China

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Abstract：
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.

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ZHAO Li, HENG Yue-Kun, WU Chong, ZHAO Xiao-Jian, SUN Zhi-Jia, WU Jin-Jie, JIANG Lin-Li, ZHAO Yu-Da, WANG Feng-Mei, WANG Yi-Fang and ZHANG Zi-Ping. Timing Performance of Plastic Scintillators of Various Sizes in a Beam Test[J]. Chinese Physics C, 2006, 30(6): 554-558.

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Received: 2005-12-08
Revised: 2006-01-13

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沈阳化工大学材料科学与工程学院沈阳 110142

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

Corresponding author:ZHAO Li,

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China2 Institute of High Energy Physics, CAS, Beijing 100049, China3 Department of Physics, Nanjing University, Nanjing 210093, China4 Institute of Engineering Physics, Zhengzhou University, Zhengzhou 450052, China

Received Date:2005-12-08
Accepted Date:2006-01-13
Available Online:2006-06-05

Abstract: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.