Limitations of the performance of PWO-II crystals due to radiation damage

Author

Novotny, R.W. ; Döring, W.M. ; Dormenev, V. ; Hofstaetter, A. ; Korzhik, M. ; Kuske, T. ; Lugert, S. ; Missevitch, O.

Author_Institution

Phys. Inst., Univ. Giessen, Giessen, Germany

fYear

2009

fDate

Oct. 24 2009-Nov. 1 2009

Firstpage

2036

Lastpage

2040

Abstract

The presented paper documents the overall quality of the PWO-II crystals for the PANDA electromagnetic calorimeter focusing in particular on the radiation hardness and the consequences on the operation at T=-25Â°C. The imposed radiation damage due to Â¿-rays can be significantly cured applying the process of stimulated recovery, which was observed for the first time for PbWO₄ scintillators. The fast recovery can be achieved even using photons in the infrared region and can be applied to operating detectors parallel to damaging irradiation in case the photo sensor is not sensitive to the external light. The technological application is part of a submitted patent (TM-382-DE).

Keywords

gamma-ray effects; lead compounds; particle calorimetry; recovery; scintillation counters; PANDA electromagnetic calorimeter; PWO scintillators; PWO-II crystals; PbWO₄; gamma radiation damage; infrared photons; low temperature operation; radiation hardness; stimulated recovery; temperature 248.15 K; Electromagnetic radiation; Infrared detectors; Infrared sensors; Magnetic sensors; Optoelectronic and photonic sensors; Photonic crystals; Physics; Spectroscopy; Telephony; Temperature measurement;

fLanguage

English

Publisher

ieee

Conference_Titel

Nuclear Science Symposium Conference Record (NSS/MIC), 2009 IEEE

Conference_Location

Orlando, FL

ISSN

1095-7863

Print_ISBN

978-1-4244-3961-4

Electronic_ISBN

1095-7863

Type

conf

DOI

10.1109/NSSMIC.2009.5402124

Filename

5402124