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PbWO crystals

PbWO crystals. Liping Gan University of North Carolina Wilmington. Comparison of heavy crystals from A.E. Borisevish, Nucl. Exp. Tech., 49, 199 (2006). Light Yield Temperature Dependence Nucl. Inst. Meth., A365, 291 (1995). d(LY)/dT is about -1.9 %/C o.

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PbWO crystals

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  1. PbWO crystals Liping Gan University of North Carolina Wilmington

  2. Comparison of heavy crystalsfrom A.E. Borisevish, Nucl. Exp. Tech., 49, 199 (2006) October 31, 2008

  3. Light Yield Temperature DependenceNucl. Inst. Meth., A365, 291 (1995) d(LY)/dT is about -1.9 %/Co October 31, 2008

  4. Scintillation decay curvesfrom A.M. Blick et al., Nucl. Instr.,Meth.,A390,30 (1997) October 31, 2008

  5. Radiation HardnessProtvino beam test result, Nucl.Instrum.Meth.A512:488-505,2003 October 31, 2008

  6. Electron Beam Irradiation Dose rate: 10-25 rad/hour 27-GeV electron beam Average saturated light loss of ~8% after 1-2 Krad Recovery study shows that 85% damage can be recovered in 2 months after irradiation

  7. Pion Beam Irradiation 10-25 rad/hour 40-GeV pion irradiation, average ~12% light loss after ~1-2 krad total dose 30-60 rad/hour 40-GeV pion irradiation, average ~20% light loss after ~2 krad total dose 500 rad/hour by charge hadrons, γ-quanta and neutrons, ~20% light loss after ~2 krad total dose Energy resolution is not noticeably degraded by the radiation damage

  8. Radiation Hardness continue----Super-intensive beam 100 krad/hour 40-GeV pion irradiation, about a factor of 3 light loss after ~2.5 Mrad total dose Degradation of energy resolution is 20-50% after ~2.5 Mrad dose October 31, 2008

  9. PrimEx PbWO4 from SIC Specified Size: 20.5x20.5x180 mm3 Tolerances: +0.0-0.1 in trans. +0.3-0.0 in long. • Collaboration managed to double the number of crystals: to from 650 to 1250 October 31, 2008

  10. PbWO4 Development:Optical Properties Optical transparency October 31, 2008

  11. PbWO4 Energy Resolution 6 x 6 crystals E/E = 1.3 % 3 x 3 1 x 1 October 31, 2008

  12. PbWO4 Position Resolution x = 1.3 mm October 31, 2008

  13. Rate dependence October 31, 2008

  14. Current Production and price in SIC • Production line in SIC is still alive. They can provide 4000 modules in one year • Price will be in the range of $2.5-$5.0 October 31, 2008

  15. Summary • Excellent energy and position resolution • Compact shower Size • Fast signals • Excellent radiation hardness • 4000 modules can be delivered by SIC within 1 year • Price is in the range of $2.5-$5.0 per cc October 31, 2008

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