ipno.in2p3.fr Orsay - September 2007IPNO-RDD-Jean Peyré1 Work at IPN Orsay R&D on Calorimeters Jean Peyré Sept 2007

ipno.in2p3.fr Orsay - September 2007IPNO-RDD-Jean Peyré2 1:Temperature dependance Michaël JOSSELIN Gain vs TemperatureReference article XP2020 Photomultiplier-0.1%/°C below 20°C -0.4%/°C above 20°C Temperature dependences of LaBr3(Ce), LaCI3(Ce) and NAI(Tl) scintillators. M.Moszynski, Nucl.Instr. And Methods in Physics Research A568(2006) p741. CSI(Tl) Crystal 326x19.9x26.7mm Amcrys From -20 to 30°C +0.28%/°C Performances of the CSI(Tl) detector element of the GLAST calorimeter. Ph. Bourgeois, Nucl.Instr. And Methods in Physics Research A518(2004) p18. Photodiode metal-resistor- semiconductor From 16 to 32°C -0.8%/°C -1.2%/°C Scintillator counters with multi-pixel avalanche photodiode readout for ND280 detector of the T2K experiment. O. Mineev, Nucl.Instr. And Methods in Physics Research A577(2007) p544. Hamamatsu HC APD Hamamatsu LC APD +2.3%/°C from 15 to 18° +2.5%/°C from 15 to 18° Characterization of avalanche photodiodes for calorymetrie applications. A. Karar, Y. Musienko, J.Ch. Vanel, Nucl.Instr. And Methods in Physics Research A428(1999) p429. Hamamatsu S5345W/- 66KG5246 APD At 25°C, Vbias=320, G= %/°C Readout of scintillator light with avalanche photodiodes for positron emission tomography. Ruru Chena, A. Fremout, S. Tavernier, P. Bruyndonckx, D. Clément, J.-F. Loude, C. Morel, Nucl.Instr. And Methods in Physics Research A428(1999) p429.

ipno.in2p3.fr Orsay - September 2007IPNO-RDD-Jean Peyré3 1:Temperature dependance Michaël JOSSELIN CONCLUSION Variation of Xtal+detector response at 20°C (according to NIm papers) PMT + CsI(Tl) → +0.2 to 0.4%/°K APD + CsI(Tl) → +2.3 to 3.8 %/°K

ipno.in2p3.fr Orsay - September 2007IPNO-RDD-Jean Peyré4 2: R&D Status at IPNO Prototypes for Calorimeter Dual Square PMTs (1 per 2 crystals) received from Photonis (1 PMT 9 stages and 1 PMT 11 stages) Scionix has promised CsI(Tl) Crystals for the end of september

ipno.in2p3.fr Orsay - September 2007IPNO-RDD-Jean Peyré5 3: magnetic field R3B Discussion with J.E. Ducret from CEA Saclay Magnetic field along Z axis of Magnet

ipno.in2p3.fr Orsay - September 2007IPNO-RDD-Jean Peyré6 3: magnetic field R3B Discussion with J.E. Ducret from CEA Saclay Magnetic field along Z axis of Magnet 218 Gauss at 900mm from point (0,0,0) Conclusion: if use of PMT, need of shilding (to be studied) (0,0,0) z x Beam axis 14° Target 1450mm R3B Calorimeter 2.2T Magnet

ipno.in2p3.fr Orsay - September 2007IPNO-RDD-Jean Peyré7 4:Non-Homogenity measurements protocol Proposition 1.Use of Charge PreAmplifier + shaper of peaking time of 3 μs 2.Feedback Capacitor Cf adapted to the gain of photodetector 3.Rf*CF >> shaping time 4.Rf >> 1 MΩ to minimize noise 5.PreAmplifier Rise Time T=Cd/wc*Cf (be careful for LaBr3+APD) 6.Measurements must be done in temperature controled room Cd

ipno.in2p3.fr Orsay - September 2007IPNO-RDD-Jean Peyré8 4:Non-Homogenity measurements protocol « MESURES D’AMPLITUDES R. HERMEL (LAPP) Du détecteur à la mesure Roscoff juin 2003 »