The use of silicon detectors for fast primary vertex reconstruction and pile-up rejection

97-016 The fraction of events with more than one interaction in LHCB is expected to be about 20 % at the nominal luminosity. In this note we describe a system of two backward Si­planes plus associated electronics for pile­up detection. A simple coincidence matrix technique is used for trigger proc...

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Detalles Bibliográficos
Autores principales: Hoogland, W, Wiggers, L, Zaitsev, N
Lenguaje:eng
Publicado: 1998
Materias:
Detectors and Experimental Techniques
Acceso en línea:http://cds.cern.ch/record/684471
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author Hoogland, W
Wiggers, L
Zaitsev, N
author_facet Hoogland, W
Wiggers, L
Zaitsev, N
author_sort Hoogland, W
collection CERN
description 97-016 The fraction of events with more than one interaction in LHCB is expected to be about 20 % at the nominal luminosity. In this note we describe a system of two backward Si­planes plus associated electronics for pile­up detection. A simple coincidence matrix technique is used for trigger processing at Level­0. The retention of single­events is 95 % for a pile­up rejection factor of 5. More B­events can be taken with a looser Level­0 trigger when rejecting the pile­up events. Moreover, double events can be reconstructed when the two interaction vertices are found to be more than a few cm apart. Additionally, the system can be used for luminosity monitoring.
id cern-684471
institution Organización Europea para la Investigación Nuclear
language eng
publishDate 1998
record_format invenio
spelling cern-6844712019-09-30T06:29:59Zhttp://cds.cern.ch/record/684471engHoogland, WWiggers, LZaitsev, NThe use of silicon detectors for fast primary vertex reconstruction and pile-up rejectionDetectors and Experimental Techniques97-016 The fraction of events with more than one interaction in LHCB is expected to be about 20 % at the nominal luminosity. In this note we describe a system of two backward Si­planes plus associated electronics for pile­up detection. A simple coincidence matrix technique is used for trigger processing at Level­0. The retention of single­events is 95 % for a pile­up rejection factor of 5. More B­events can be taken with a looser Level­0 trigger when rejecting the pile­up events. Moreover, double events can be reconstructed when the two interaction vertices are found to be more than a few cm apart. Additionally, the system can be used for luminosity monitoring.LHCb-97-016oai:cds.cern.ch:6844711998-01-20
spellingShingle Detectors and Experimental Techniques
Hoogland, W
Wiggers, L
Zaitsev, N
The use of silicon detectors for fast primary vertex reconstruction and pile-up rejection
title The use of silicon detectors for fast primary vertex reconstruction and pile-up rejection
title_full The use of silicon detectors for fast primary vertex reconstruction and pile-up rejection
title_fullStr The use of silicon detectors for fast primary vertex reconstruction and pile-up rejection
title_full_unstemmed The use of silicon detectors for fast primary vertex reconstruction and pile-up rejection
title_short The use of silicon detectors for fast primary vertex reconstruction and pile-up rejection
title_sort use of silicon detectors for fast primary vertex reconstruction and pile-up rejection
topic Detectors and Experimental Techniques
url http://cds.cern.ch/record/684471
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AT wiggersl useofsilicondetectorsforfastprimaryvertexreconstructionandpileuprejection
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