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IPN Orsay R&D on Calorimeters Jean Peyré Göteborg - October 2008

IPN Orsay R&D on Calorimeters Jean Peyré Göteborg - October 2008. 1.Milano conclusions in 2006 2.Lund conclusions in 2007 3.Magnetic Field 4.Temperature dependence 5.Xtalk of XP14D5 6.Quality of manufacturers 7.Calorimeter Design 8.Demonstrator 9.Conclusions. 22x22x22. 22x22x220. 44x22x200.

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IPN Orsay R&D on Calorimeters Jean Peyré Göteborg - October 2008

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  1. IPN OrsayR&D on Calorimeters Jean PeyréGöteborg - October 2008 IPNO-RDD-Jean Peyré

  2. 1.Milano conclusions in 20062.Lund conclusions in 20073.Magnetic Field4.Temperature dependence5.Xtalk of XP14D56.Quality of manufacturers7.Calorimeter Design8.Demonstrator9.Conclusions IPNO-RDD-Jean Peyré

  3. 22x22x22 22x22x220 44x22x200 66x22x200 XP5300B 5,74% 6,70% 5,86% 6,57% APD S8664-1010 8,23% 9,39% XP1912 8,05% 9,40% 10,33% 12,28% Energy Resolutions CsI(Tl)+VM2000+APD/PMT+137Cs MILANO oct 2006 IPNO-RDD-Jean Peyré

  4. Use of XP1452 foreseen in 2007 MILANO oct 2006 • XP1452  38 mm (Active area 4x272mm2), green extended bialkaly • Quantum efficiency 30% at 420nm, 20% at 550nm • Size from 35mm to 50mm Next tests with XP1452 XP1452 IPNO-RDD-Jean Peyré

  5. Conclusions of Milano Oct 2006 MILANO oct 2006 Calculated Resolutions Xtal 22x22x220 @550nm IPNO-RDD-Jean Peyré

  6. Conclusions of Milano Oct 2006 MILANO oct 2006 • Collected light through long crystals is not constant. Tests with non collimated 137Cs source give resolutions greater that 15%. • The choice of VM2000 seems obvious • With XP1912, it seems difficult to have a resolution better than 9%-10% at 662keV on long crystals because: • Area covered by PMT is only 36% with 22x22 output face • Intrinsic resolution of crystal is quite high (~4/5%) • Photocathode is not green extended bialkaly • Resolution obtained with PMT XP1912 and APD are quite comparable until 3.25MeV • No work has been done on surface quality (polished/rough) • Use of XP1452 seems promising • Tests on LaCl3/LaBr3 crystals • Litrani simulations to be explored IPNO-RDD-Jean Peyré

  7. 1.Milano conclusions in 20062.Lund conclusions in 20073.Magnetic Field4.Temperature dependence5.Xtalk of XP14D56.Quality of manufacturers7.Calorimeter Design8.Demonstrator9.Conclusions IPNO-RDD-Jean Peyré

  8. Results for PMT + 137Cs Crystal from St-Gobain 22x22x220 LUND june 2007 Crystal 22x22x220 Before modification by St Gobain Output face polished and others unpolished After modification by St Gobain Polished (brown), unpolished (red) IPNO-RDD-Jean Peyré

  9. Results for PMT + 137Cs Crystal from St-Gobain 22x22x220 LUND june 2007 IPNO-RDD-Jean Peyré

  10. Results for PMT + 137Cs Crystal from St-Gobain/Amcrys/Scionnix 22x22x220 LUND june 2007 IPNO-RDD-Jean Peyré

  11. St-Gobain Amcrys Scionnix 22x22x22 5,74% 5.96% 5,75% 22x22x220 6,71% 6,33% 6,29% Energy Resolutions CsI(Tl)+VM2000+PMT+137Cs Crystal from different companies with XP5300B LUND june 2007 IPNO-RDD-Jean Peyré

  12. Energy Resolution for some Crystals LUND june 2007 CsI(Na) 137Cs XP5300B 22x22x22 60Co CsI(Tl) 22x22x22 LaCl3 Diam25x25 56Co Energy resolution LaBr3 Diam25x25 IPNO-RDD-Jean Peyré

  13. Conclusions of Lund June 2007 LUND june 2007 CsI(Tl) • For CsI(Tl), the basic resolution for different manufacturers is quite comparable for small Crystals, but the wrapping and opticical treatement for long crystals seem at that time to be a very difficult science for St Gobain • Energy resolution of 5/5.5% seams reachable with XP1452 / XP14D5 at 1MeV New Crystals • Even if Labr3/LaCl3 is very promising, St Gobain seems at that time to have great difficulties to make long crystals. • Good Energy and Time resolution on small Crystals • There are no competitors on this market at that time • Are they interested by designing special crystals for physics experiments ? IPNO-RDD-Jean Peyré

  14. 1.Milano conclusions in 20062.Lund conclusions in 20073.Magnetic Field4.Temperature dependence5.Xtalk of XP14D56.Quality of manufacturers7.Calorimeter Design8.Demonstrator9.Conclusions IPNO-RDD-Jean Peyré

  15. Magnetic field R3B R3B Calorimeter Target Xm Zc 2.2T Magnet Yc Xc Beam axis Ym 14° Zm 1450mm (0,0,0) m More than 600 Gauss IPNO-RDD-Jean Peyré

  16. Magnetic field R3B R3B Calorimeter Target Xm Zc 2.2T Magnet Yc Xc Beam axis Ym 14° Zm 1450mm (0,0,0) m Iron cylinder IPNO-RDD-Jean Peyré

  17. Magnetic field R3Bwith shielding 10cm thick (R<50cm) Magnetic field in calorimeter coordinate for different Yc Coordinates (cm) Magnetic field out of shielding > 1500 Gauss Yc=65 Max value of Magnetic field in each vertical plane Yc Yc (cm) B without shielding(Gauss) B with shielding 2cm(Gauss) B with shielding 10cm(Gauss) IPNO-RDD-Jean Peyré

  18. 1.Milano conclusions in 20062.Lund conclusions in 20073.Magnetic Field4.Temperature dependence5.Xtalk of XP14D56.Quality of manufacturers7.Calorimeter Design8.Demonstrator9.Conclusions IPNO-RDD-Jean Peyré

  19. 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-RDD-Jean Peyré

  20. 1.Milano conclusions in 20062.Lund conclusions in 20073.Magnetic Field4.Temperature dependence5.Xtalk of XP14D56.Quality of manufacturers7.Calorimeter Design8.Demonstrator9.Conclusions IPNO-RDD-Jean Peyré

  21. XP1452 Test of new PMt XP14D5 4 Channels PMt 2 Channels PMt XP14D5 IPNO-RDD-Jean Peyré

  22. Xtalk between 2 channels saw line 3mm +saw line 2mm 3mm 3 PMT’s -1 with window thickness 3mm -1 with window thickness 2mm -1 with window thickness 3mm + saw line IPNO-RDD-Jean Peyré

  23. CH1 CH2 CH1 CH2 Xtalk between 2 channels We want to measure the Crosstalk between the two channels of the PMT when placing a crystal in front of one of the two channels. Case A S1a=G1*NbPhé1a S2a=G2*NbPhé2a NbPhé= Number of Photoélectrons created on each part of the photocathode & collected by first dynode G= global Gain for each Channel (PMT+ChargePream+Shaper) S= signal for each channel CH Cross-Talk CH1->CH2 NbPhé2a/NbPhé1a=S2a/S1a*G1/G2 Case B S1b=G1*NbPhé1b S2b=G2*NbPhé2b Cross-Talk CH2->CH1 NbPhé1b/NbPhé2b=S1b/S2b*G2/G1 IPNO-RDD-Jean Peyré

  24. Xtalk between 2 channels Cross-Talk CH2->CH1 Cross-Talk CH1->CH2 Are supposed equal (estimation of ±12% variation between both) Cross-Talk = (S1b/S2b*S2a/S1a)1/2 Xtalk1= standard Crosstalk Xtalk2= standard Crosstalk measured with saw line filed with white silicon The standard production of PMT will certainly provide a quite constant crosstalk between channels: easy to correct IPNO-RDD-Jean Peyré

  25. 1.Milano conclusions in 20062.Lund conclusions in 20073.Magnetic Field4.Temperature dependence5.Xtalk of XP14D56.Quality of manufacturers7.Calorimeter Design8.Demonstrator9.Conclusions IPNO-RDD-Jean Peyré

  26. Xtals ordered from other manufacturers New crystals received :- Amcrys (Russia) and Siccas (China) IPNO-RDD-Jean Peyré

  27. Results CsI(Tl)+VM2000+XP5300B+137Cs SICCAS Xtal Amcrys Xtal IPNO-RDD-Jean Peyré

  28. Energy Resolutions CsI(Tl)+VM2000+PMT+137Cs 22x22x22 22x22x220 44x22x200 66x22x200 XP5300B Amcrys Amcrys St-Gobain St-Gobain 5,96% 6,33% 5,86% 6,57% 19x38x19 19x38x110 19x38x130 XP5300B Amcrys Amcrys Amcrys 6,1% 6,3% 6,4% Measurements can be inproved as we have received new PMT’s XP1452 -> XP14D5 100μA/lm-> 150 μA/lm XP1452 Amcrys Amcrys Amcrys 7,1% 7,34% 7,5% IPNO-RDD-Jean Peyré

  29. Energy Resolutions CsI(Tl)+VM2000+PMT+137Cs Measures made with optimized PM (Photonis #1014 tube) and collimated sources IPNO-RDD-Jean Peyré

  30. Measurements with APD’s Many difficulties to obtain low noise signals if the APD touches the hole made for the crystal => bad resolution g source 137Cs FWHM > 10 % Signal + noise of an APD too near from the hole EM shield box CsI (Tl) crystal APD IPNO-RDD-Jean Peyré

  31. Measurements with APD’s Influence of the gain / shield The APD 12 mm inside the shield box 12 mm IPNO-RDD-Jean Peyré

  32. 1.Milano conclusions in 20062.Lund conclusions in 20073.Magnetic Field4.Temperature dependence5.Xtalk of XP14D56.Quality of manufacturers7.Calorimeter Design8.Demonstrator9.Conclusions IPNO-RDD-Jean Peyré

  33. Common R&D for the EXL and R3B Calorimeters Basic design : CsI(Tl) & Studies on alternative solutions IPNO-RDD-Jean Peyré

  34. 3.0° 2.0° 1.7° 1.5° 1.2° Σ 24.0° Σ 16.0° Σ 16.0° Σ 13.6° Σ 12.0° Σ 9.6° 90° 106° 74° Polar angles 130° 60.4° 48.4° 38.8° 3.0° 2.0° 1.7° Beam 1.5° 1.34° 1.2° Target Barrel EndCap Common R&D for the EXL and R3B Calorimeters Design guided by Doppler shift IPNO-RDD-Jean Peyré

  35. Possible Calorimeter Design - R&D Example of Panda calorimeter IPNO-RDD-Jean Peyré

  36. Possible Calorimeter Design - R&D Square PMT (2 per envelop) Tests on a prototype Rectangular Crystals IPNO-RDD-Jean Peyré

  37. 1.Milano conclusions in 20062.Lund conclusions in 20073.Magnetic Field4.Temperature dependence5.Xtalk of XP14D56.Quality of manufacturers7.Calorimeter Design8.Demonstrator9.Conclusions IPNO-RDD-Jean Peyré

  38. Prototype R3B-EXL IPNO-RDD-Jean Peyré

  39. Prototype R3B-EXL Rectangular Crystals Square PMT (1 per 2 crystals) We have ordered 18 CsI(Tl) crystals from Amcrys and 9 PMts from Photonis. All material in November at IPNO (CsI(Tl)+Dual PMT). Base design made at IPN Orsay. IPNO-RDD-Jean Peyré

  40. Prototype R3B-EXL In 2008, construction of a prototype of 18 Xtals [CsI(Tl)] with 9 square PMT • Simulation and Tests of the prototype with different thickness of material in between the crystals depending on mechanical and physics considerations. IPNO-RDD-Jean Peyré

  41. Prototype R3B-EXL We have received 18 CsI(Tl) crystals from Amcrys IPNO-RDD-Jean Peyré

  42. Prototype R3B-EXL Test signal input Ch1 output Ch2 output Ch1_CPA output Bases are ready Low voltage Still waiting for PhotoMultiplier Tubes Commun HV Ch2_CPA output IPNO-RDD-Jean Peyré

  43. Prototype R3B-EXL Ch1_CPA output Bases are ready Low voltage Still waiting for PhotoMultiplier Tubes IPNO-RDD-Jean Peyré

  44. 1.Milano conclusions in 20062.Lund conclusions in 20073.Magnetic Field4.Temperature dependence5.Xtalk of XP14D56.Quality of manufacturers7.Calorimeter Design8.Demonstrator9.Conclusions IPNO-RDD-Jean Peyré

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