Uniformisation Techniques for Crystals in the ECAL Endcaps

In this paper we present techniques for achieving the desired uniformity of longitudinal light collection in the lead tungstate crystals for the CMS electromagnetic calorimeter endcaps. It is found that shading the chamfered edges of the crystals with a pencil can achieve a reduction in the front no...

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Detalles Bibliográficos
Autores principales: Britton, David, Ryan, Matthew John, Qu, Xiangdong, Häfliger, P
Lenguaje:eng
Publicado: 2004
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/787504
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author Britton, David
Ryan, Matthew John
Qu, Xiangdong
Häfliger, P
author_facet Britton, David
Ryan, Matthew John
Qu, Xiangdong
Häfliger, P
author_sort Britton, David
collection CERN
description In this paper we present techniques for achieving the desired uniformity of longitudinal light collection in the lead tungstate crystals for the CMS electromagnetic calorimeter endcaps. It is found that shading the chamfered edges of the crystals with a pencil can achieve a reduction in the front non-uniformity of approximately 0.1%/Xo. Similar effect are observed by de-polishing the chamfers.
id cern-787504
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2004
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spelling cern-7875042019-09-30T06:29:59Zhttp://cds.cern.ch/record/787504engBritton, DavidRyan, Matthew JohnQu, XiangdongHäfliger, PUniformisation Techniques for Crystals in the ECAL EndcapsDetectors and Experimental TechniquesIn this paper we present techniques for achieving the desired uniformity of longitudinal light collection in the lead tungstate crystals for the CMS electromagnetic calorimeter endcaps. It is found that shading the chamfered edges of the crystals with a pencil can achieve a reduction in the front non-uniformity of approximately 0.1%/Xo. Similar effect are observed by de-polishing the chamfers.CMS-NOTE-2004-006oai:cds.cern.ch:7875042004-03-25
spellingShingle Detectors and Experimental Techniques
Britton, David
Ryan, Matthew John
Qu, Xiangdong
Häfliger, P
Uniformisation Techniques for Crystals in the ECAL Endcaps
title Uniformisation Techniques for Crystals in the ECAL Endcaps
title_full Uniformisation Techniques for Crystals in the ECAL Endcaps
title_fullStr Uniformisation Techniques for Crystals in the ECAL Endcaps
title_full_unstemmed Uniformisation Techniques for Crystals in the ECAL Endcaps
title_short Uniformisation Techniques for Crystals in the ECAL Endcaps
title_sort uniformisation techniques for crystals in the ecal endcaps
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/787504
work_keys_str_mv AT brittondavid uniformisationtechniquesforcrystalsintheecalendcaps
AT ryanmatthewjohn uniformisationtechniquesforcrystalsintheecalendcaps
AT quxiangdong uniformisationtechniquesforcrystalsintheecalendcaps
AT hafligerp uniformisationtechniquesforcrystalsintheecalendcaps

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