CMS Document 3007-v1

Study on the properties of lead tungstate crystals

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Ren-Yuan Zhu
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Ren-Yuan Zhu
Document Created:
20 Sep 2010, 11:45
Contents Revised:
20 Sep 2010, 11:45
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21 Sep 2010, 20:34
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This report summarizes the results of a study on the properties of five large and five small size lead hmgstate (PbW04) crystals. Data are presented on the longitudinal optical transmittance and light attenuation length, light yield and response uniformity, emission spectra and decay time. The radiation resistance of large crystals and possible curing with optical bleaching are discussed. The result of an in depth materials study, including trace impurities analysis, are also presented. The general conclusion from this investigation is that further research and development is needed to develop fast, radiation hard PbW04 crystals for the CMS experiment at the CERN LHC.
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