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

fYear

2012

fDate

Oct. 27 2012-Nov. 3 2012

Firstpage

1681

Lastpage

1687

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium and Medical Imaging Conference (NSS/MIC), 2012 IEEE

Conference_Location

Anaheim, CA

ISSN

1082-3654

Print_ISBN

978-1-4673-2028-3

Type

conf

DOI

10.1109/NSSMIC.2012.6551398

Filename

6551398