Title :
Electromagnetic calorimetry with PbWO4 in the energy regime below 1 GeV
Author :
Novotny, R. ; Beck, R. ; Doring, W. ; Hejny, V. ; Hofstaetter, A. ; Korzhik, M.V. ; Metag, V. ; Ströher, H.
Author_Institution :
II. Phys. Inst., Giessen Univ., Germany
Abstract :
The study of the performance and application of PbWO4 in electromagnetic calorimetry at energies far below 1 GeV has been continued. The significantly improved optical and scintillation properties of 15 cm long Nb/La-doped crystals, optimized for the ECAL/CMS calorimeter, are documented. The lineshape, energy and time response of a 5×5 matrix are tested with monoenergetic photons up to 790 MeV energy and compared to previous measurements. First attempts have been made to enhance the scintillation yield by suitable dopants (Mo,Tb) for applications at very low photon energies. As a first large scale project at medium energies, the proposed concept for a compact photon spectrometer to be implemented into the ANKE magnetic spectrometer at COSY (KFA Julich) is illustrated
Keywords :
gamma-ray detection; lead compounds; particle calorimetry; solid scintillation detectors; 0 to 1 GeV; ANKE magnetic spectrometer; ECAL/CMS calorimeter; PbWO4; compact photon spectrometer; electromagnetic calorimetry; lineshape; monoenergetic photons; scintillation properties; scintillation yield; very low photon energies; Calorimetry; Collision mitigation; Energy measurement; Large-scale systems; Niobium; Photonic crystals; Spectroscopy; Testing; Time factors; Time measurement;
Conference_Titel :
Nuclear Science Symposium, 1999. Conference Record. 1999 IEEE
Conference_Location :
Seattle, WA
Print_ISBN :
0-7803-5696-9
DOI :
10.1109/NSSMIC.1999.842483
