Novotny a* , S. F. Burachas d , W. Döring a , V. Dormenev b , ncharenko c , M. S. Ippolitov d , A. Hofstaetter e , M. Ko Manko d , Y. M. Melnick d , O. Missevitch b ,V. V. Mochalov zantsev c , P. A. Semenov c , G. Tamulaitis f , A. V. Uzun A. Vasiliev d , A. N. Vasiliev c and for the PANDA collaboration a II. Physics Institute, University Giessen , Heinrich-Buff-Ring 16, 35392 Giessen, Germany b INP, Belarus State University, 11 Bobruiskaya, 220030 Minsk, Belarus c Institute for High Energy Physics, Protvino, Russia d R.RC Kurchatov Institute, Moscow, Russia e I. Physics Institute, University Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany f Vilnius University, Vilnius, Lithuania ation hardness and recovery proces of PWO crystals at –25 o C SCINT 07 R.Novotny 1 SCINT 07 R.Novotny 1
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R.Novotny a* , S. F. Burachas d , W. Döring a , V. Dormenev b ,
Radiation hardness and recovery processes of PWO crystals at –25 o C. R.Novotny a* , S. F. Burachas d , W. Döring a , V. Dormenev b , Y. M. Goncharenko c , M. S. Ippolitov d , A. Hofstaetter e , M. Korzhik b , V. Manko d , Y. M. Melnick d , O. Missevitch b ,V. V. Mochalov c , - PowerPoint PPT Presentation
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R.Novotnya*, S. F. Burachasd, W. Döringa, V. Dormenevb, Y. M. Goncharenkoc, M. S. Ippolitovd, A. Hofstaettere, M. Korzhikb,
V. Mankod, Y. M. Melnickd, O. Missevitchb,V. V. Mochalovc, V. Ryazantsevc, P. A. Semenovc, G. Tamulaitisf, A. V. Uzunianc,
A. Vasilievd, A. N. Vasilievc and for the PANDA collaboration
aII. Physics Institute, University Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
bINP, Belarus State University, 11 Bobruiskaya, 220030 Minsk, Belarusc Institute for High Energy Physics, Protvino, Russia
dR.RC Kurchatov Institute, Moscow, RussiaeI. Physics Institute, University Giessen, Heinrich-Buff-Ring 16, 35392 Giessen, Germany
fVilnius University, Vilnius, Lithuania
Radiation hardness and recovery processes of PWO crystals
at –25oC
SCINT 07 R.Novotny 1SCINT 07 R.Novotny 1
• high resolution calorimetry with PWO CMS – HYCAL – DVCS – ALICE - PANDA• the experimental facility at IHEP• experimental results• interpretation
decay kinetics – defects - impurities• consequences, further experiments and outlook
SCINT 07 R.Novotny 2
SCINT 07 R.Novotny 3
• high resolution calorimetry with PWO
+ fast and very dense scintillator: <10ns Xo=0.9cm
+ radiation hard @RT: CMS-ECAL
- low light yield: medium-energy application
improvement of the photon statistics by:• increase of light output PWO-II• operation well below room temperature
0 200 400 600 800 10000
20
40
60
80
100
LY
/ p
.e./M
eV
integration gate / ns
-25oC
-10oC
-0oC+10oC+25oC
photon energy / MeV
/ E
%
excellent energy resolutionachievable at low temperatures