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.
Tipologia IRIS:
01 - Articolo su periodico
Keywords:
silicon pixel detectors ; ATLAS ; LHC
Elenco autori:
A. Andreazza
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