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Systematic Study of the PbWO4 Crystal Short Term Instalibity Under Irradiation
/ Annenkov, Alexander (Bogoroditsk Techno-Chemical Plant, Bogoroditsk, Russia) ; Auffray, Etiennette (CERN) ; Chipaux, Rémi (DAPNIA, Saclay, France) ; Drobychev, Gleb (LAPP, Annecy le Vieux, France) ; Fedorov, Andrey (Institute for Nuclear Problems, Minsk, Belarus) ; Géléoc, Marie (DAPNIA, Saclay, France) ; Golubev, Nikolai (Institute for Nuclear Research, Moscow, Russia) ; Korzhik, Mikhail (Institute for Nuclear Problems, Minsk, Belarus) ; Lecoq, Paul (CERN) ; Ligun, A B (Bogoroditsk Techno-Chemical Plant, Bogoroditsk, Russia) et al.
The effect of the irradiation on the lead tungstate ( PWO) scintillator properties has been studied at different irradiation facilities. Lead tungstate crystals grown with the tuning of oxides content in the melt to the stoichiometry of pure sheelite or sheelite-like type crystals and doped with heterovalent, trivalent and pentavalent impurities have been studied in order to optimize their resistance to irradiation. [...]
CMS-NOTE-1997-055.-
Geneva : CERN, 1997
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Studies and Proposals for an Automatic Crystal Control System
/ Drobychev, Gleb (LAPP, Annecy and INP, MINSK) ; Fedorov, Andrey (INP, MINSK, Belarus) ; Khruschinsky, A A (INP, MINSK, Belarus) ; Korzhik, Mikhail (INP, MINSK, Belarus) ; Missevitch, Oleg (INP, Minsk, Belarus) ; Oriboni, André (LAPP, France) ; Peigneux, Jean-Pierre (LAPP, France) ; Schneegans, Marc (LAPP, France)
This document presents the status of the studies for an Automatic Crystal Control System ( ACCOS) performed since autumn 1995 for the CMS collaboration. Evaluation of a startstop method for light yield, light uniformity and decay time measurements of PbWO4 crystals is presented, as well as the first results obtained with a compact double-beam spectrophotometer for transverse transmission. [...]
CMS-NOTE-1997-036.-
Geneva : CERN, 1997
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Stabilized dye Laser for Crystal Electromagnetic Calorimeter Monitoring
/ Fedorov, Andrey (INP, Minsk, Belarus) ; Korzhik, Mikhail (INP, Minsk, Belarus) ; Lopatik, Andrei (INP, Minsk, Belarus) ; Moinester, M A ; Peigneux, Jean-Pierre (LAPP, Annecy, France) ; Singovsky, Alexander (LAPP, Annecy, France) ; Steiner, V
An on-line active laser light output stabilization system is developed. The system compensates for slow variations of the laser light output caused by temperature drifts and by the aging of laser elements. [...]
CMS-NOTE-2000-026.-
Geneva : CERN, 2000
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PbWO4 Crystals Radiation Hardness Test Setup at the CERN General Irradiation Facility
/ Peigneux, Jean-Pierre (LAPP, Annecy-le-Vieux, France) ; Fedorov, Andrey (Institute for Nuclear Problems, Minsk, Belarus) ; Korzhik, Mikhail (Institute for Nuclear Problems, Minsk, Belarus) ; Missevitch, Oleg (Institute for Nuclear Problems, Minsk, Belarus) ; Singovsky, Alexander (LAPP, Annecy-le-Vieux, France)
The CMS PWO crystals irradiation facility installed at the CERN GIF ( General Irradiation Facility) is described. The measurement method and corresponding stability issues are discussed. [...]
CMS-NOTE-1999-061.-
Geneva : CERN, 1999
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Radiation damage Kinetics in PWO crystals
/ Annenkov, Alexander (Bogoroditsk Techno Chemical Plant, Russia) ; Auffray, Etiennette (CERN) ; Fedorov, Andrey (INP, Minsk, Belarus) ; Gninenko, Sergei (INR, Moscow, Russia) ; Golubev, Nikolai (INR, Moscow, Russia) ; Korzhik, Mikhail (INP, Minsk, Belarus) ; Lecoq, Paul (CERN) ; Ligun, V (BTCP, Bogoroditsk, Russia) ; Lobko, A (INP, Minsk, Belarus) ; Missevitch, Oleg (INP, Minsk, Belarus) et al.
This note proposed a model to describe the kinetics of the irradiation damage in PWO crystal and apply it to two well-known measurement methods of the optical transmission damaged by irradiation..
CMS-NOTE-1997-008.-
Geneva : CERN, 1997
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