R&amp;D of the TOF Detector for BESⅢ

TANG Ze-Bo; LI Xin; AN Shao-Hui; CHEN Hong-Fang; HENG Yue-Kun; LI Cheng; SHAO Ming; SUN Yong-Jie; WANG Yi-Fang; WU Chong; ZENG Hui; ZHAO Li; ZHAO Xiao-Jian

Chinese Physics C> 2006, Vol. 30> Issue(5) : 445-448

R&D of the TOF Detector for BESⅢ

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China2 Institute of High Energy Physics, Beijing 100049, China

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Abstract：
The Endcap TOF (ETOF) of Beijing Spectrometer(BESⅢ) is consisted of 2×48 pieces of trapezoidal scintillator. Its main physics goal is to realize 2σ π/k separation at momentum up to 0.8GeV/c, and to reach the intrinsic time resolution of 80ps. In this paper, the properties of photomultiplier tube(R5924) and plastic scintillators (BC404, BC408, EJ204) are studied, a ETOF module with different wrappings is tested with the beam of 800MeV electron at IHEP. The results show that the time resolution of an ETOF module using scintillator BC404 or EJ204 is below 80ps which includes the electronic fluctuation. The ESR wrapping can efficiently enhance the amplitude of the output pulse and improve the performance of the TOF detector.

References

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TANG Ze-Bo, LI Xin, AN Shao-Hui, CHEN Hong-Fang, HENG Yue-Kun, LI Cheng, SHAO Ming, SUN Yong-Jie, WANG Yi-Fang, WU Chong, ZENG Hui, ZHAO Li and ZHAO Xiao-Jian. R&D of the TOF Detector for BESⅢ[J]. Chinese Physics C, 2006, 30(5): 445-448.

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Received: 2005-07-27
Revised: 2005-11-25

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通讯作者: 陈斌, bchen63@163.com

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沈阳化工大学材料科学与工程学院沈阳 110142

R&D of the TOF Detector for BESⅢ

Corresponding author: LI Cheng,

Department of Modern Physics, University of Science and Technology of China, Hefei 230026, China2 Institute of High Energy Physics, Beijing 100049, China

Received Date: 2005-07-27

Accepted Date: 2005-11-25

Available Online: 2006-05-05

Abstract: The Endcap TOF (ETOF) of Beijing Spectrometer(BESⅢ) is consisted of 2×48 pieces of trapezoidal scintillator. Its main physics goal is to realize 2σ π/k separation at momentum up to 0.8GeV/c, and to reach the intrinsic time resolution of 80ps. In this paper, the properties of photomultiplier tube(R5924) and plastic scintillators (BC404, BC408, EJ204) are studied, a ETOF module with different wrappings is tested with the beam of 800MeV electron at IHEP. The results show that the time resolution of an ETOF module using scintillator BC404 or EJ204 is below 80ps which includes the electronic fluctuation. The ESR wrapping can efficiently enhance the amplitude of the output pulse and improve the performance of the TOF detector.

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R&D of the TOF Detector for BESⅢ

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R&D of the TOF Detector for BESⅢ

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