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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. - PowerPoint PPT Presentation

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  • PbWO crystalsLiping GanUniversity of North Carolina Wilmington

    October 31, 2008

  • Comparison of heavy crystals from A.E. Borisevish, Nucl. Exp. Tech., 49, 199 (2006)

    October 31, 2008

  • Light Yield Temperature Dependence Nucl. Inst. Meth., A365, 291 (1995)d(LY)/dT is about -1.9 %/Co

    October 31, 2008

  • Scintillation decay curvesfrom A.M. Blick et al., Nucl. Instr.,Meth.,A390,30 (1997)

    October 31, 2008

  • Radiation HardnessProtvino beam test result, Nucl.Instrum.Meth.A512:488-505,2003

    October 31, 2008

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

  • Pion Beam Irradiation10-25 rad/hour 40-GeV pion irradiation, average ~12% light loss after ~1-2 krad total dose30-60 rad/hour 40-GeV pion irradiation, average ~20% light loss after ~2 krad total dose500 rad/hour by charge hadrons, -quanta and neutrons, ~20% light loss after ~2 krad total doseEnergy resolution is not noticeably degraded by the radiation damage

  • Radiation Hardness continue----Super-intensive beam100 krad/hour 40-GeV pion irradiation, about a factor of 3 light loss after ~2.5 Mrad total doseDegradation of energy resolution is 20-50% after ~2.5 Mrad dose

    October 31, 2008

  • PrimEx PbWO4 from SICSpecifiedSize: 20.5x20.5x180 mm3Tolerances: +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

  • PbWO4 Development:Optical PropertiesOptical transparency

    October 31, 2008

  • PbWO4 Energy Resolution6 x 6 crystalsE/E = 1.3 %1 x 1 3 x 3

    October 31, 2008

  • PbWO4 Position Resolutionx = 1.3 mm

    October 31, 2008

  • Rate dependence

    October 31, 2008

  • Current Production and price in SICProduction line in SIC is still alive. They can provide 4000 modules in one yearPrice will be in the range of $2.5-$5.0

    October 31, 2008

  • SummaryExcellent energy and position resolutionCompact shower SizeFast signalsExcellent radiation hardness4000 modules can be delivered by SIC within 1 yearPrice is in the range of $2.5-$5.0 per cc

    October 31, 2008