An unexpected effect in ALEPH: long-term displacements of the silicon vertex detector

The ALEPH Silicon Vertex Detector for LEP2 featured a laser survey system to monitor its mechanical stability. The analysis of laser system data from 1997 to 2000 showed that VDET suffered a time-dependent displacement. It resulted to be compatible with a deformation of the support structure that ma...

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Autor principal: Sguazzoni, Giacomo
Lenguaje:eng
Publicado: 2002
Materias:
Other Fields of Physics
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/551851
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author Sguazzoni, Giacomo
author_facet Sguazzoni, Giacomo
author_sort Sguazzoni, Giacomo
collection CERN
description The ALEPH Silicon Vertex Detector for LEP2 featured a laser survey system to monitor its mechanical stability. The analysis of laser system data from 1997 to 2000 showed that VDET suffered a time-dependent displacement. It resulted to be compatible with a deformation of the support structure that made the device to slowly rotate during the data-taking. A maximal local displacement of ~20 microns was observed, corresponding to a rotation of ~10E-4 rad. The implementation of a time-dependent correction on the alignment by using the laser system data led to sizeable improvements on the ALEPH data quality.
id cern-551851
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2002
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spelling cern-5518512023-03-14T18:03:14Zhttp://cds.cern.ch/record/551851engSguazzoni, GiacomoAn unexpected effect in ALEPH: long-term displacements of the silicon vertex detectorOther Fields of PhysicsDetectors and Experimental TechniquesThe ALEPH Silicon Vertex Detector for LEP2 featured a laser survey system to monitor its mechanical stability. The analysis of laser system data from 1997 to 2000 showed that VDET suffered a time-dependent displacement. It resulted to be compatible with a deformation of the support structure that made the device to slowly rotate during the data-taking. A maximal local displacement of ~20 microns was observed, corresponding to a rotation of ~10E-4 rad. The implementation of a time-dependent correction on the alignment by using the laser system data led to sizeable improvements on the ALEPH data quality.The ALEPH Silicon Vertex Detector for LEP2 featured a laser survey system to monitor its mechanical stability. The analysis of laser system data from 1997 to 2000 showed that VDET suffered a time-dependent displacement. It resulted to be compatible with a deformation of the support structure that made the device to slowly rotate during the data-taking. A maximal local displacement of ~20 microns was observed, corresponding to a rotation of ~10E-4 rad. The implementation of a time-dependent correction on the alignment by using the laser system data led to sizeable improvements on the ALEPH data quality.physics/0205047oai:cds.cern.ch:5518512002-05-16
spellingShingle Other Fields of Physics
Detectors and Experimental Techniques
Sguazzoni, Giacomo
An unexpected effect in ALEPH: long-term displacements of the silicon vertex detector
title An unexpected effect in ALEPH: long-term displacements of the silicon vertex detector
title_full An unexpected effect in ALEPH: long-term displacements of the silicon vertex detector
title_fullStr An unexpected effect in ALEPH: long-term displacements of the silicon vertex detector
title_full_unstemmed An unexpected effect in ALEPH: long-term displacements of the silicon vertex detector
title_short An unexpected effect in ALEPH: long-term displacements of the silicon vertex detector
title_sort unexpected effect in aleph: long-term displacements of the silicon vertex detector
topic Other Fields of Physics
Detectors and Experimental Techniques
url http://cds.cern.ch/record/551851
work_keys_str_mv AT sguazzonigiacomo anunexpectedeffectinalephlongtermdisplacementsofthesiliconvertexdetector
AT sguazzonigiacomo unexpectedeffectinalephlongtermdisplacementsofthesiliconvertexdetector

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