dorsal/arxiv
View SchemaFirst results on radiation damage in PbWO4 crystals exposed to a 20 GeV/c proton beam
| Authors | M. Huhtinen, P. Lecomte, D. Luckey, F. Nessi-Tedaldi |
|---|---|
| Categories | |
| ArXiv ID | physics/0312056 |
| URL | https://arxiv.org/abs/physics/0312056 |
| DOI | 10.1142/9789812702708_0096 |
Abstract
We have exposed seven full length production quality crystals of the electromagnetic calorimeter (ECAL) of the CMS detector to a 20 GeV/c proton beam at the CERN PS accelerator. The exposure was done at fluxes of 10**12 p/cm**2/h and 10**13 p/cm**2/h and integral fluences of 10**12 p/cm**2 and 10**13 p/cm**2 were reached at both rates. The light transmission of the crystals was measured after irradiation and suitable cooling time for induced radioactivity to decrease to a safe level. First results of these measurements are shown. The possible damage mechanisms are discussed and simulations based on one possible model are presented. The implications for long-term operation of CMS are discussed and it is shown that in the whole barrel and at least most of the ECAL endcap hadron damage alone - even if cumulative - should not cause the crystals to fail the CMS specification of an induced absorption coefficient muIND < 1.5 /m during the first 10 years of LHC operation.
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"abstract": "We have exposed seven full length production quality crystals of the\nelectromagnetic calorimeter (ECAL) of the CMS detector to a 20 GeV/c proton\nbeam at the CERN PS accelerator. The exposure was done at fluxes of 10**12\np/cm**2/h and 10**13 p/cm**2/h and integral fluences of 10**12 p/cm**2 and\n10**13 p/cm**2 were reached at both rates. The light transmission of the\ncrystals was measured after irradiation and suitable cooling time for induced\nradioactivity to decrease to a safe level. First results of these measurements\nare shown. The possible damage mechanisms are discussed and simulations based\non one possible model are presented. The implications for long-term operation\nof CMS are discussed and it is shown that in the whole barrel and at least most\nof the ECAL endcap hadron damage alone - even if cumulative - should not cause\nthe crystals to fail the CMS specification of an induced absorption coefficient\nmuIND \u003c 1.5 /m during the first 10 years of LHC operation.",
"arxiv_id": "physics/0312056",
"authors": [
"M. Huhtinen",
"P. Lecomte",
"D. Luckey",
"F. Nessi-Tedaldi"
],
"categories": [
"physics.ins-det"
],
"doi": "10.1142/9789812702708_0096",
"title": "First results on radiation damage in PbWO4 crystals exposed to a 20 GeV/c proton beam",
"url": "https://arxiv.org/abs/physics/0312056"
},
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