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A luminosity monitor for LHC: [notes of a thesis]

LHC luminosity will reach 10/sup 34/ cm/sup -2/ s/sup -1/ but special runs at 10/sup 28/ cm/sup -2/ s/sup -1/ are foreseen. Thus a luminosity monitor must have a dynamic range of six orders of magnitude. A good tolerance to radiation is also required. A detector using both ionisation and secondary e...

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Autor principal: Perrot, Anne Laure
Lenguaje:eng
Publicado: 2000
Materias:
Acceso en línea:http://cds.cern.ch/record/559300
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author Perrot, Anne Laure
author_facet Perrot, Anne Laure
author_sort Perrot, Anne Laure
collection CERN
description LHC luminosity will reach 10/sup 34/ cm/sup -2/ s/sup -1/ but special runs at 10/sup 28/ cm/sup -2/ s/sup -1/ are foreseen. Thus a luminosity monitor must have a dynamic range of six orders of magnitude. A good tolerance to radiation is also required. A detector using both ionisation and secondary emission techniques has been studied in this context. Its design is based on monitors used previously at the CERN PS and SPS. Special attention was devoted to minimise leakage currents. Linearity in both Secondary Emission Counter (SEC) and Ionisation Chamber (IC) modes has been tested from ~10/sup 4/ incident particles to ~10/sup 8/ incident particles. SEC is linear above ~5.10/sup 6/ incident particles while IC is linear over the full studied range. However, because of the radiation environment at LHC, the SEC mode is much preferred at high intensity. A solution actually foreseen is to switch from IC to SEC mode when the intensity is around 5.10/sup 6/ incident particles per second corresponding to an LHC luminosity of 6.10/sup 30/ cm/sup -2/ s/sup -1/. (12 refs).
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spelling cern-5593002019-09-30T06:29:59Zhttp://cds.cern.ch/record/559300engPerrot, Anne LaureA luminosity monitor for LHC: [notes of a thesis]Accelerators and Storage RingsLHC luminosity will reach 10/sup 34/ cm/sup -2/ s/sup -1/ but special runs at 10/sup 28/ cm/sup -2/ s/sup -1/ are foreseen. Thus a luminosity monitor must have a dynamic range of six orders of magnitude. A good tolerance to radiation is also required. A detector using both ionisation and secondary emission techniques has been studied in this context. Its design is based on monitors used previously at the CERN PS and SPS. Special attention was devoted to minimise leakage currents. Linearity in both Secondary Emission Counter (SEC) and Ionisation Chamber (IC) modes has been tested from ~10/sup 4/ incident particles to ~10/sup 8/ incident particles. SEC is linear above ~5.10/sup 6/ incident particles while IC is linear over the full studied range. However, because of the radiation environment at LHC, the SEC mode is much preferred at high intensity. A solution actually foreseen is to switch from IC to SEC mode when the intensity is around 5.10/sup 6/ incident particles per second corresponding to an LHC luminosity of 6.10/sup 30/ cm/sup -2/ s/sup -1/. (12 refs).oai:cds.cern.ch:5593002000
spellingShingle Accelerators and Storage Rings
Perrot, Anne Laure
A luminosity monitor for LHC: [notes of a thesis]
title A luminosity monitor for LHC: [notes of a thesis]
title_full A luminosity monitor for LHC: [notes of a thesis]
title_fullStr A luminosity monitor for LHC: [notes of a thesis]
title_full_unstemmed A luminosity monitor for LHC: [notes of a thesis]
title_short A luminosity monitor for LHC: [notes of a thesis]
title_sort luminosity monitor for lhc: [notes of a thesis]
topic Accelerators and Storage Rings
url http://cds.cern.ch/record/559300
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