Title :
A Study on Radiation Damage in PWO-II Crystals
Author :
Fan Yang ; Rihua Mao ; Liyuan Zhang ; Ren-yuan Zhu
Author_Institution :
California Inst. of Technol., Pasadena, CA, USA
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 FAIR. 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 PWO crystals used in the CMS experiment. Progresses are observed in the light output and 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 follow variations of crystal transparency in situ.
Keywords :
gamma-ray effects; lead compounds; particle calorimetry; solid scintillation detectors; CMS experiment; FAIR PANDA experiment; PWO-II crystals; crystal calorimeter; gamma-ray irradiation; light output; light response uniformity; radiation damage; radiation hardness; transmittance; Absorption; Correlation; Crystals; Image color analysis; Optical variables measurement; Radiation effects; Silicon carbide; Crystal; light output; photo-luminescence; radiation damage; scintillator; transmission;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2013.2262660
