Title :
A study on radiation hardness of PWO-II crystals
Author :
Fan Yang ; Rihua Mao ; Liyuan Zhang ; Ren-yuan Zhu
Author_Institution :
California Inst. of Technol., Pasadena, CA, USA
fDate :
Oct. 27 2012-Nov. 3 2012
Abstract :
We report in this paper an investigation on radiation hardness of 20 cm long PWO-II crystals produced at BTCP for the proposed PANDA experiment at GSI. The optical and scintillation properties of PWO-II crystals, such as transmittance, light output and light response uniformity, were measured before and after γ-ray irradiations at different dose rates. PWO-II crystals are compared to crystals used in the CMS experiment. Progresses are observed in the radiation hardness for PWO-II crystals. Its use for crystal calorimeters in future high energy physics experiments is discussed. To maintain crystal precision, a precision light monitoring system is mandatory to trace variations of crystal transparency in situ for a PWO crystal calorimeter in a radiation environment.
Keywords :
calorimeters; gamma-ray effects; lead compounds; radiation hardening; solid scintillation detectors; CMS experiment; GSI; PANDA experiment; PWO crystal calorimeter; PWO-II crystals; PbWO4; crystal calorimeters; crystal precision; crystal transparency in situ; dose rates; gamma-ray irradiations; high energy physics experiments; light output; light response uniformity; optical properties; precision light monitoring system; radiation environment; radiation hardness; scintillation crystals; scintillation properties; size 20 cm; trace variations; transmittance;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-2028-3
DOI :
10.1109/NSSMIC.2012.6551398
