Data di Pubblicazione:
2010
Citazione:
The ATLAS Pixel Detector operation and
performance / A. Andreazza. - In: POS PROCEEDINGS OF SCIENCE. - ISSN 1824-8039. - VERTEX2010:(2010), pp. 005.1-005.9. ((Intervento presentato al 19. convegno International workshop on vertex detectors : VERTEX tenutosi a Loch Lomond, Scotland, UK nel 2010.
Abstract:
The ATLAS Pixel Detector is the innermost detector of the ATLAS experiment at the Large
Hadron Collider at CERN. It consists of 1744 silicon sensors equipped with approximately 80×
106 electronic channels, providing typically three measurement points with high resolution for
particles emerging fromthe beam-interaction region. The complete Pixel Detector has been taking
part in cosmic-ray data-taking since 2008. Since November 2009 it has been operated with LHC
colliding beams at √s = 900 GeV, 2.36 TeV and 7 TeV.
The detector operated with an active fraction of 97.2% at a threshold of 3500 e, showing a noise
occupancy rate better than 10−9 hit/pixel/BC and a track association efficiency of 99%.
The Lorentz angle for electrons in silicon is measured to be qL = 12.11◦ ±0.09◦ and its temperature
dependence has been verified. The pulse height information from the time-over-threshold
technique allows an improvement of the point resolution using charge sharing and particle identification
at low momentum using the specific energy loss.
Hadron Collider at CERN. It consists of 1744 silicon sensors equipped with approximately 80×
106 electronic channels, providing typically three measurement points with high resolution for
particles emerging fromthe beam-interaction region. The complete Pixel Detector has been taking
part in cosmic-ray data-taking since 2008. Since November 2009 it has been operated with LHC
colliding beams at √s = 900 GeV, 2.36 TeV and 7 TeV.
The detector operated with an active fraction of 97.2% at a threshold of 3500 e, showing a noise
occupancy rate better than 10−9 hit/pixel/BC and a track association efficiency of 99%.
The Lorentz angle for electrons in silicon is measured to be qL = 12.11◦ ±0.09◦ and its temperature
dependence has been verified. The pulse height information from the time-over-threshold
technique allows an improvement of the point resolution using charge sharing and particle identification
at low momentum using the specific energy loss.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
silicon pixel detectors ; ATLAS ; LHC
Elenco autori:
A. Andreazza
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