Calibration, testing, commissioning and first data of ALFA at LHC

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The ALFA (Absolute Luminosity For ATLAS) project aims at measuring luminosity of the LHC with high precision by using pp-scattering under small angles. This will be done by moving an upper and a lower tracking detector inside Roman Pots very close to the beam. To align the upper and lower tracking d...

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Autor principal: Jakobsen, S
Lenguaje:eng
Publicado: 2011
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/1381584
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author Jakobsen, S
author_facet Jakobsen, S
author_sort Jakobsen, S
collection CERN
description The ALFA (Absolute Luminosity For ATLAS) project aims at measuring luminosity of the LHC with high precision by using pp-scattering under small angles. This will be done by moving an upper and a lower tracking detector inside Roman Pots very close to the beam. To align the upper and lower tracking detector a dedicated part overlaps and the alignment will be done with particles passing both the upper and the lower detector. The tracking detectors are made of scintillating square fibers read out by MultiAnode PhotoMutiplier Tubes, MAPMTs, with custom made electronics. The gain of the MAPMT channels has been equalized and the average light yield of scintillating fibers determined before installation in LHC. Also reflections on the Roman Pot windows have been observed and the window has been blackened to reduce the effect. The ALFA detectors are currently being commissioned at ATLAS/LHC and the first particles observed in the detectors.
id cern-1381584
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 2011
record_format invenio
spelling cern-13815842019-09-30T06:29:59Zhttp://cds.cern.ch/record/1381584engJakobsen, SCalibration, testing, commissioning and first data of ALFA at LHCDetectors and Experimental TechniquesThe ALFA (Absolute Luminosity For ATLAS) project aims at measuring luminosity of the LHC with high precision by using pp-scattering under small angles. This will be done by moving an upper and a lower tracking detector inside Roman Pots very close to the beam. To align the upper and lower tracking detector a dedicated part overlaps and the alignment will be done with particles passing both the upper and the lower detector. The tracking detectors are made of scintillating square fibers read out by MultiAnode PhotoMutiplier Tubes, MAPMTs, with custom made electronics. The gain of the MAPMT channels has been equalized and the average light yield of scintillating fibers determined before installation in LHC. Also reflections on the Roman Pot windows have been observed and the window has been blackened to reduce the effect. The ALFA detectors are currently being commissioned at ATLAS/LHC and the first particles observed in the detectors.ATL-LUM-PROC-2011-002oai:cds.cern.ch:13815842011-09-13
spellingShingle Detectors and Experimental Techniques
Jakobsen, S
Calibration, testing, commissioning and first data of ALFA at LHC
title Calibration, testing, commissioning and first data of ALFA at LHC
title_full Calibration, testing, commissioning and first data of ALFA at LHC
title_fullStr Calibration, testing, commissioning and first data of ALFA at LHC
title_full_unstemmed Calibration, testing, commissioning and first data of ALFA at LHC
title_short Calibration, testing, commissioning and first data of ALFA at LHC
title_sort calibration, testing, commissioning and first data of alfa at lhc
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/1381584
work_keys_str_mv AT jakobsens calibrationtestingcommissioningandfirstdataofalfaatlhc

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