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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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Lenguaje: | eng |
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2000
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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). |
id | cern-559300 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2000 |
record_format | invenio |
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 |
work_keys_str_mv | AT perrotannelaure aluminositymonitorforlhcnotesofathesis AT perrotannelaure luminositymonitorforlhcnotesofathesis |