Three dimensional parametrization of electromagnetic shower in Alpha Magnetic Spectrometer Ⅱ ECAL

• Published in: Chinese physics C Vol. 32; no. 3; pp. 191 - 195
• Main Author: 陶军全 杨民 陈国明 李祖豪 李新乔 唐志成 张震 王健
• Format: Journal Article
• Language: English
• Published: IOP Publishing 01.03.2008; Key Laboratory of Particle Astrophysics, Institute of High Energy Physics, CAS, Beijing 100049, China
• Subjects: ECAL; 三维参数; 分光计; 电磁热量计; 经验式; empirical formula; ECAL; test beam; 3-D parametrization
• ISSN: 1674-1137; 0254-3052; 2058-6132
• DOI: 10.1088/1674-1137/32/3/006

We develop an empirical formula to parameterize the 3-dimension （3D） distribution of electromagnetic showers in the Alpha Magnetic Spectrometer Ⅱ electromagnetic calorimeter（ECAL）. The formula was verified by ECAL test beam data in 2002 and found to perform well. The distribution of electron showers in the ECAL are well described by the formula, which has parameters that allow one to determine the 3D shape of electromagnetic showers in the ECAL. We use this formula to correct for lateral energy leakage and dead channels in the ECAL; good results are obtained.