Title :
Optimization of the lead-tungstate crystal/photodetector system for high-energy physics
Author :
Drobyshev, G. Yu ; Fyodorov, A.A. ; Krozhik, M.V. ; Miseveich, O.V. ; Katchanov, V.A. ; Peigneux, J.-P.
Author_Institution :
Inst. for Nuclear Problems, Minsk, Russia
fDate :
30 Oct-5 Nov 1994
Abstract :
The characteristics of the crystal/photodetector system with long size lead-tungstate scintillator PbWO4 (PWO) were studied. The influence of different measurement conditions on the light yield and light yield homogeneity was investigated for the electromagnetic calorimeter modules with projective geometry. We have tested different kinds of reflective materials for crystal covering such as MYLAR (mirror reflection) and MILLIPORE, TEFLON, TYVEK (diffuse reflection), using different shapes of crystals (as a parallelepiped, as a truncated pyramid, as a double truncated pyramid), using light guides and/or reflecting covering at the bottom of the crystal. In our investigation we have used a photomultiplier tube
Keywords :
gamma-ray detection; lead compounds; photomultipliers; solid scintillation detectors; MILLIPORE; MYLAR; PbWO4; PbWO4 photodetector system; TEFLON; TYVEK; crystal covering; diffuse reflection; double truncated pyramid; electromagnetic calorimeter modules; lead-tungstate crystal/photodetector system; light yield homogeneity; long size lead-tungstate scintillator; mirror reflection; optimization; parallelepiped; photomultiplier tube; projective geometry; reflective materials; truncated pyramid; Crystalline materials; Crystals; Electromagnetic measurements; Electromagnetic reflection; Geometry; Materials testing; Mirrors; Optical reflection; Photodetectors; Shape;
Conference_Titel :
Nuclear Science Symposium and Medical Imaging Conference, 1994., 1994 IEEE Conference Record
Conference_Location :
Norfolk, VA
Print_ISBN :
0-7803-2544-3
DOI :
10.1109/NSSMIC.1994.474401
