نتایج جستجو برای: nano pbwo4
تعداد نتایج: 50653 فیلتر نتایج به سال:
An overview is given of the Lead Tungstate (PbWO4) electromagnetic crystal calorimeter for the CMS detector at the Large Hadron Collider (LHC) at CERN in Geneva. This includes a description of the engineering design, the development of the calorimeter components, the read-out system and results obtained in particle beams. Presented at IEEE Nuclear Science Symposium, Toronto, Canada, November 19...
A method for cutting the 110’000 PbWO4 crystals of the CMS Electromagnetic Calorimeter is proposed. The machinery, the tooling and the sequence of operation are described. Processing parameters resulting from experimental runs are indicated. A mass production organisation is forecasted. CMS Note 1997/024 01 04 1997 M. Lebeau 2
a humidity sensor thin film based on nanoporous pbwo4-wo3 composites has been prepared by spin coating technique with different weight ratio of pbwo4 (pb) and wo3 (wo) (pwwo-01, pwwo-82, pwwo-64, pwwo-46, pwwo-28, pwwo-01) and their humidity sensing properties have also been investigated at different relative humidity (rh) in the range of 5% - 98% at room temperature with dc resistance. it is f...
A humidity sensor thin film based on nanoporous PbWO4-WO3 composites has been prepared by spin coating technique with different weight ratio of PbWO4 (Pb) and WO3 (WO) (PWWO-01, PWWO-82, PWWO-64, PWWO-46, PWWO-28, PWWO-01) and their humidity sensing properties have also been investigated at different relative humidity (RH) in the range of 5% - 98% at room temperature with dc resistance. It is f...
Ensuring the radiation hardness of PbWO4 crystals was one of the main priorities during the construction of the electromagnetic calorimeter of the CMS experiment at CERN. The production on an industrial scale of radiation hard crystals and their certification over a period of several years represented a difficult challenge both for CMS and for the crystal suppliers. The present article reviews ...
The origin of the transmission damage in PWO crystals is discussed. It is shown that both electron and hole centers created on the basis of structural defects in PbWO4 crystals contributed to the induced absorption of the crystals. The different aspects of the suppression of the recharge processes in PWO scintillation crystals are also discussed. 1 Bogoroditsk Techno Chemical Plant, Bogoroditsk...
An overview status is given of the Lead Tungstate electromagnetic calorimeter which is being developped for the CMS detector at LHC. This includes the development status of PbWO4 crystals, the mechanical design of the calorimeter, the read-out and a brief look into results from test measurements in particle beams. Presented at the “5th International Conference on Advanced Technology and Particl...
Lead Tungstate crystals for the CMS detector at LHC have to withstand severe levels of radiation. Presented here are measurement techniques and results on crystal behaviour under gamma irradiation from tests at ETH/PSI in conditions similar to what is expected during operation of the CMS electromagnetic calorimeter. Presented at International Workshop on Lead Tungstate crystals, Rome, Italy, Oc...
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