Studies on High Energy γ Trigger of Lead-Scintillating Fiber Electromagnetic Calorimeter

YANG Zhao-Yu; CHEN Guo-Ming; CHEN Gang; YANG Min; WANG Xiao-Bin; LI Zu-Hao; ZHANG Shao-He; LU Yu-Sheng; CHEN He-Sheng

Chinese Physics C> 2004, Vol. 28> Issue(10) : 1086-1089

Studies on High Energy γ Trigger of Lead-Scintillating Fiber Electromagnetic Calorimeter

Institute of High Energy Physics,CAS,Beijing 100039,China

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Abstract：
The high flux of cosmic ray proton forms the main background of γ ray detection experiments using a lead scintillating fiber sandwiched electromagnetic calorimeter. The trigger scheme is studied to efficiently detect high energy γ rays and reject most of the proton events. Efficient cuts are derived from the Monte Carlo analysis of electromagnetic shower shape in the calorimeter. Photons with energy above 10GeV are triggered at the level of 99%. The requirement of proton rate less than 100 Hz is also satisfied. The accuracy of the simulations is testified with the beam test.

References

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. Battiston R et al. Astropart. Phys., 2000, 13: 51-742. Alcaraz J et al ( AMS Collaboration). Phys. Lett., 2000, B490: 27-353. TANG Xiao-Wei. Methods of Particle Physics Experiments Beijing: People's Education Press, 1982(in Chinese)(唐孝威. 粒子物理实验方法北京: 人民教育出版社, 1982)4. Sreekumar P et al. APJ, 1998, 494: 523-5345. Application Software Group, CERN Computing and Networks Division. GEANT Detect or Description and Simulation Tool. 19936. LI Zu-Hao et al. HEP NP, 2004, 28: 521(in Chinese)(李祖豪等. 高能物理与核物理, 2004, 28: 521)7. Alcaraz J et al (AMS Collaboration). Phys. Lett., 2000, B472: 215-226

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YANG Zhao-Yu, CHEN Guo-Ming, CHEN Gang, YANG Min, WANG Xiao-Bin, LI Zu-Hao, ZHANG Shao-He, LU Yu-Sheng and CHEN He-Sheng. Studies on High Energy γ Trigger of Lead-Scintillating Fiber Electromagnetic Calorimeter[J]. Chinese Physics C, 2004, 28(10): 1086-1089.

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Received: 2004-01-06
Revised: 1900-01-01

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沈阳化工大学材料科学与工程学院沈阳 110142

Studies on High Energy γ Trigger of Lead-Scintillating Fiber Electromagnetic Calorimeter

Corresponding author: YANG Zhao-Yu,

Institute of High Energy Physics,CAS,Beijing 100039,China

Received Date: 2004-01-06
Accepted Date: 1900-01-01
Available Online: 2004-10-05

Abstract: The high flux of cosmic ray proton forms the main background of γ ray detection experiments using a lead scintillating fiber sandwiched electromagnetic calorimeter. The trigger scheme is studied to efficiently detect high energy γ rays and reject most of the proton events. Efficient cuts are derived from the Monte Carlo analysis of electromagnetic shower shape in the calorimeter. Photons with energy above 10GeV are triggered at the level of 99%. The requirement of proton rate less than 100 Hz is also satisfied. The accuracy of the simulations is testified with the beam test.