Monitoring LSO/LYSO Crystal Based Calorimeters

[摘要] Precision light monitoring is important for keeping excellent energy resolution promised by LSO/LYSO crystals in severe radiation environment. In this paper, we report an investigation on the wavelength choice for monitoring LYSO crystal based calorimeters. Gamma-ray induced absorption and light output loss were measured for 20 cm long crystals from five different vendors. Monitoring sensitivity and divergence between crystals from different vendors were investigated. The pros and cons of two monitoring approaches using emission and excitation light and their practical implementation for a LYSO/W Shashlik test beam matrix are discussed.

[发布机构] 256-48 HEP, California Institute of Technology, Pasadena; CA; 91125, United States^1

[关键词] Energy resolutions;Excitation light;Induced absorption;Light monitoring;Light output;LYSO crystals;Monitoring approach;Radiation environments