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Work at IPN Orsay R&D on Calorimeters Jean Peyré Sept 2007. 1:Temperature dependance. Michaël JOSSELIN. 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 - PowerPoint PPT Presentation
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Orsay - September 2007IPNO-RDD-Jean Peyré 1
Peyr
ej @
ipno
.in2p
3.fr
Work at IPN Orsay
R&D on Calorimeters
Jean PeyréSept 2007
Orsay - September 2007IPNO-RDD-Jean Peyré 2
Peyr
ej @
ipno
.in2p
3.fr1:Temperature dependance
Michaël JOSSELINGain vs Temperature Reference 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) Crystal326x19.9x26.7mmAmcrys
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 APDHamamatsu 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=100+3.8%/°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.
Orsay - September 2007IPNO-RDD-Jean Peyré 3
Peyr
ej @
ipno
.in2p
3.fr1: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
Orsay - September 2007IPNO-RDD-Jean Peyré 4
Peyr
ej @
ipno
.in2p
3.fr
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
Orsay - September 2007IPNO-RDD-Jean Peyré 5
Peyr
ej @
ipno
.in2p
3.fr
3: magnetic field R3B
Discussion with J.E. Ducret from CEA Saclay
Magnetic field along Z axis of Magnet
Orsay - September 2007IPNO-RDD-Jean Peyré 6
Peyr
ej @
ipno
.in2p
3.fr
3: magnetic field R3B
Discussion with J.E. Ducret from CEA SaclayMagnetic 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 axis14°
Target
1450mm
R3B Calorimeter
2.2T Magnet
Orsay - September 2007IPNO-RDD-Jean Peyré 7
Peyr
ej @
ipno
.in2p
3.fr4: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 noise5. PreAmplifier Rise Time T=Cd/wc*Cf (be careful for
LaBr3+APD)
6. Measurements must be done in temperature controled room
Cd
Orsay - September 2007IPNO-RDD-Jean Peyré 8
Peyr
ej @
ipno
.in2p
3.fr4:Non-Homogenity measurements
protocol
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