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NUSTAR Calorimeter Working Group Activity Report - September 2006

This report details the NUSTAR Calorimeter Working Group's activities from September 14-15, 2006. Coordinated by D. Cortina and J.A. Scarpaci, it focuses on enhancing collaboration among 41 members from 21 institutions across 10 countries to strengthen calorimeter research and development. The report includes meeting summaries, discussions on detector simulations, crystal properties, and the status of ongoing projects, as well as future projections regarding prototype construction and testing schedules.

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NUSTAR Calorimeter Working Group Activity Report - September 2006

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  1. NUSTAR Calorimeter WG activity report Nustar Management Board, September 14-15 2006

  2. NUSTAR CALORIMETER Working Group Coordinator : D. Cortina , J.A. Scarpaci Created in : February 2005 after the NUSTAR collaboration Goal: Find synergies between the different calorimeters in NUSTAR (R&D, Dessing phase, but also common front to negociate with providers) List : 41 members, 21 Institutions , 10 countries, Meetings - February 2005 GSI, Darmstadt (Germany) - June 2005 Valencia (Spain) - Informal meeting , September 2005, Orsay (France) - September 2005 Santiago de Compostela(Spain) - February 2006, IPN Orsay (France) - September 2006, Krakow ( SPIRAL) - October 2006, Milano (Italy) STILL NO GENERAL WEB PAGE Minutes and information available on: http:// www usc.es/genp  R3B/NUSTAR  Calorimeter http:// la direccion del IPN

  3. Updated Technical proposal for R3B cal Large dynamic range for detecting p,g Inner radius ~ 30 cm ( house Si trackers) Affordable cost!!!

  4. Simulations of the detector response Experimental constrains ECM = 10 MeV Gammas are emitted with energies up to Elab= 3.2 ECM (for β = 0.82) • To correct for the Lorentz boost it is mandatory a high granularity. • A huge crystal length is required for full energy absorption (β = 0.82) Due to the boost, gammas are basically emitted in the forward direction. A large open zone in the backwards region reduces dramatically the crystal bulk needed. H. Alvarez Pol – R3B Gamma Calorimeter NUSTAR Calorimeter WG – Valencia 17/06/05

  5. Calorimeter models (CAD) v1.2 v4.0a v4.0c v4.0b USC, IPN

  6. !? Crystal properties GSI, Lund, USC, IPN,IEM,UCM

  7. Calorimeter models (GEANT4) Detailed simulations v1.2 v4.0a v4.0b USC

  8. AGENDA 16:30 Work Status reports · 16:30-16:45 J. Peyre (IPN Orsay) Crystal tests @IPN · 16:45-17:00 I. Duran (USC) Crystal test @ USC · 17:00-17:15 S. Tashenov (GSI) Crystal test @GSI · 17:15-17:30 O. Tengbland (CSIC, Madrid) "Two layer detector" for the p-detection · 17: 30-17:45 Bo Jackobsson ( Lund) Avalanche PD readout. Test possibilities for both proton and gamma beams in Sweden · 17:45-18:00 R. Wolski (Dubna) Radiation damage of PD's and APD's · 18:00-18:15 H. Alvarez (USC) Simulations · 18:15-18: 40 Common discussion on the status reports 18-40 - ….. Other topics -         Working group package definition -         Prototype module construction -         Beam tests, what, where and when? -         Time schedule / Technical dessign report/ Deadlines Electronics- DAQ definition -         Internal MoU, working coordination -         European Money (7 FP) -         Decissions and Actions -         Next meeting

  9. Conclusions on crystal test and Simulations • CsI(Tl) energy resolution does not depend on the position 0.3% difference going from 4000 to 5000 collected light Resolution about 7-8% - more R&D with LaCl3 and squared PM Need to reproduce data with LITRANI for a full simulation • CsI(Tl) +APD (covering the full area) Barrel for R3B prototype • CsI(Tl) + PD could be an option to consider  need to be tested • CsI(pure)need to be tested at LN temperature • CsI(Na) +2PM readout reduce the light yield dependence on position interaction  is this a realistic option? • BGO have strong non uniformity • one single cristal readout with different PM  should be tested • The two layer concept only acceptable in the “expensive” option LaBr+ LaCl or CsI(undopped) but it needs to be tested (forward angles) • The two layer concept needs a realistic simulation • Radiation hardness problem for PD and probably worse for APD’s  what one expect after 15cm crystal??? • Full simulations(including reconstruction algorithms) are really needed

  10. 04/10/2006 Milan NUSTAR Calorimeter Working Group Meeting Prototype construction • 12 crystals (approx. 1x2x17 cm3) • APDs S8664-10 (Hamamatsu) • mechanical structure  IPNO concept • temperature and voltage stabilisation • electronics Saclay digitizers ?? • DAQ  VME/MBS • full simulation (Hector Alvarez) • Beam tests

  11. 04/10/2006 Milan NUSTAR Calorimeter Working Group Meeting Beam Tests • ACCULINA p,d,t,alpha • MAX-lab (LUND) 10-230 MeV photons • TSL/ GWC cyclotron (Upssala) up to p 180 MeV, d,t.alpha • GSI • Tandem-Madrid

  12. 04/10/2006 Milan NUSTAR Calorimeter Working Group Meeting Working Package definition

  13. 04/10/2006 Milan NUSTAR Calorimeter Working Group Meeting Electronics and DAQ

  14. 04/10/2006 Milan NUSTAR Calorimeter Working Group Meeting Organisative issues • Internal MoU ( i.e. DAQ WG) • European Money (FP7)

  15. 04/10/2006 Milan NUSTAR Calorimeter Working Group Meeting Decisions and Actions for R3B • Crystal and readout tests for barrel  till end 2006 • Proposal for a barrel prototype  February 2007 • Prototype construction  July 2007 • Beam tests  from September 2007 • Crystal and readout tests for forward end-cup  First results (including simulation) February 2007  Final results and decisions June 2007 • Prototype ...... • Mechanical design study • Next Working group February

  16. 04/10/2006 Milan NUSTAR Calorimeter Working Group Meeting Decisions and Actions for EXL

  17. Results CsI(Tl)+Teflon+XP5300B+137Cs Resolution FWHM Collected light for 137Cs peak VS position of impact • RS=5,5%±0,2 except for crystal 22x22x220: RS~7% • Global Resolution is quite constant along the Crystal • Variation from 14% to 38% of collected light along the Crystal

  18. Results for PMT/VM2000+137Cs Collected light for 137Cs peak VS position of impact

  19. 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% Resolutions CsI(Tl)+VM2000+APD/PMT+137Cs

  20. XP1918 XP1901 XP3102 S8664-10 6.07 % 7.03% 9.06% 5.15 % 7.42% 8.45% 9.87% 6.28% 10.71% 12.76% 15.70% 6.31% Summary of USC Crystal tests 1x1x1cm 1x1x5 cm 1x1x10 cm Energy resolution for CsI(Tl) with a 137Cs (662 keV) source R3B/EXL meeting Milan Oct-06

  21. What the Lund/Dubna group wishes to achieve until next annual meeting • produce two* close-to-final (forward) EGPA clusters • requires CsI(Tl) decided (alternatives?,doping conc?) • from geometry decided (length?, square and rectangular.*) • Milano: readout device decided (APD or PD?) • put these clusters in correct EXL recoil detector setup (dummy) • requires exact design of ESPA for D-section (foil, thicknesses) • from HV or air (if HV – what wall?) • Milano: • make complete GEANT4 simulations for these clusters • requires we agree on the input for resolution and efficiency limiting effects • from establish direct cooperation with Orsay group, others? • Milano: • test the clusters in-beam with both protons and photons • requires from acceptance of beamtime and beamline design • TSL, MAX-lab (preliminarily accepted) • and ACULINNA:

  22. Beam-lines available for proton and gamma tests ACULINNA: Mass separator at JINR, Dubna [A. M. Rodin et al., Nucl. Instr. Meth. B 204 (2003) 114] p, d, t, αetc MAX-lab: New tagged photon beam-line from MAX electron synchrotron [J-O Adler et al. Nucl. Instr. Meth. A 388 (1996) 17] 10 – 230 MeV photons TSL/GWC: Cyclotron at The Svedberg Lab., Uppsala [L-O Andersson et al., TSL Progress report 1987-1991 p. 10] p up to 180 MeV, d, t, α

  23. Beam-lines available for proton and gamma tests ACULINNA: Mass separator at JINR, Dubna [A. M. Rodin et al., Nucl. Instr. Meth. B 204 (2003) 114] p, d, t, αetc MAX-lab: New tagged photon beam-line from MAX electron synchrotron [J-O Adler et al. Nucl. Instr. Meth. A 388 (1996) 17] 10 – 230 MeV photons TSL/GWC: Cyclotron at The Svedberg Lab., Uppsala [L-O Andersson et al., TSL Progress report 1987-1991 p. 10] p up to 180 MeV, d, t, α

  24. Large position sensitive LaBr3:Ce detector 5 cm D C A B A B 6 cm E =  (Ea...ED) a b pos(x,y,z) = centroid of light distribution Other concepts GSI J. Gerl (GSI) NUSTAR Calorimeter WG – Valencia

  25. Time schedule R3B g-calorimeter

  26. Other concepts • Two H8500 Flat panel Photomultiplier tube • MPET-H8500 readout interface • Two scintillating arrays: • Array BrilLanCe 380 Full detection area 2”x 2”, 4x4x30 mm3, encapsulated in Al housing, 3mm glass window • Array PreLuDe 420 Full detection area 2”x 2”, 4x4x30 mm3 • Spatial resolution for proton detection • gabsorption energy resolution M. Turrión, O. Tengblad NUSTAR Calorimeter WG – Valencia IEM

  27. Time schedule R3B g-calorimeter

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