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Investigating the baselines of Bismuth, Optical Fiber and LED calibrated photomultiplier tubes
LUCID is a detector that is the luminosity monitor for the ATLAS experiment, and its aim is to determine luminosity with an uncertainty of a few percent. The main purpose of this work is the study of the baseline stability of the LUCID readout channels during calibration runs. This study represents...
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Lenguaje: | eng |
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2016
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Acceso en línea: | http://cds.cern.ch/record/2210815 |
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author | Evans, Hywel Turner |
author_facet | Evans, Hywel Turner |
author_sort | Evans, Hywel Turner |
collection | CERN |
description | LUCID is a detector that is the luminosity monitor for the ATLAS experiment, and its aim is to determine luminosity with an uncertainty of a few percent. The main purpose of this work is the study of the baseline stability of the LUCID readout channels during calibration runs. This study represents the first systematic approach of this problem performed by the LUCID group. By replacing the mean baseline with the minimum baseline of each event, an upper limit of 2.85% was placed upon possible improvement in determining the LED amplitude. It is therefore better to use a fixed baseline for LED, as pollution has been observed when calculating event by event. For Bismuth and Fiber, the improvement cannot be more than the gain stability of 1%, therefore the existing method is verified as optimal. |
id | cern-2210815 |
institution | Organización Europea para la Investigación Nuclear |
language | eng |
publishDate | 2016 |
record_format | invenio |
spelling | cern-22108152019-09-30T06:29:59Zhttp://cds.cern.ch/record/2210815engEvans, Hywel TurnerInvestigating the baselines of Bismuth, Optical Fiber and LED calibrated photomultiplier tubesParticle Physics - ExperimentLUCID is a detector that is the luminosity monitor for the ATLAS experiment, and its aim is to determine luminosity with an uncertainty of a few percent. The main purpose of this work is the study of the baseline stability of the LUCID readout channels during calibration runs. This study represents the first systematic approach of this problem performed by the LUCID group. By replacing the mean baseline with the minimum baseline of each event, an upper limit of 2.85% was placed upon possible improvement in determining the LED amplitude. It is therefore better to use a fixed baseline for LED, as pollution has been observed when calculating event by event. For Bismuth and Fiber, the improvement cannot be more than the gain stability of 1%, therefore the existing method is verified as optimal.CERN-STUDENTS-Note-2016-150oai:cds.cern.ch:22108152016-08-27 |
spellingShingle | Particle Physics - Experiment Evans, Hywel Turner Investigating the baselines of Bismuth, Optical Fiber and LED calibrated photomultiplier tubes |
title | Investigating the baselines of Bismuth, Optical Fiber and LED calibrated photomultiplier tubes |
title_full | Investigating the baselines of Bismuth, Optical Fiber and LED calibrated photomultiplier tubes |
title_fullStr | Investigating the baselines of Bismuth, Optical Fiber and LED calibrated photomultiplier tubes |
title_full_unstemmed | Investigating the baselines of Bismuth, Optical Fiber and LED calibrated photomultiplier tubes |
title_short | Investigating the baselines of Bismuth, Optical Fiber and LED calibrated photomultiplier tubes |
title_sort | investigating the baselines of bismuth, optical fiber and led calibrated photomultiplier tubes |
topic | Particle Physics - Experiment |
url | http://cds.cern.ch/record/2210815 |
work_keys_str_mv | AT evanshywelturner investigatingthebaselinesofbismuthopticalfiberandledcalibratedphotomultipliertubes |