Abstract
The ATLAS-MPX detectors are based on the Medipix2 silicon devices designed by CERN for the detection of multiple types of radiation. Sixteen such detectors were successfully operated in the ATLAS detector at the LHC and collected data independently of the ATLAS data-recording chain from 2008 to 2013. Each ATLAS-MPX detector provides separate measurements of the bunch-integrated LHC luminosity. An internal consistency for luminosity monitoring of about 2% was demonstrated. In addition, the MPX devices close to the beam are sensitive enough to provide relative-luminosity measurements during van der Meer calibration scans, in a low-luminosity regime that lies below the sensitivity of the ATLAS calorimeter-based bunch-integrating luminometers. Preliminary results from these luminosity studies are presented for 2012 data taken at √s = 8 TeV proton-proton collisions.
Highlights
André Sopczak (IEAP CTU in Prague) on behalf of the ATLAS and Medipix[2] Collaborations ATLAS conference note ATLAS-CONF-2013-103
Normalize MPX hit rate/luminosity with the ATLAS BCM luminosity detector for the data taking on 21 May 2012
Normalize MPX thermal neutron rate/luminosity with the BCM ATLAS luminosity detector for the data taking on 21 May 2012
Summary
André Sopczak (IEAP CTU in Prague) on behalf of the ATLAS and Medipix[2] Collaborations ATLAS conference note ATLAS-CONF-2013-103. 13th Topical Seminar on Innovative Particle and Radiation Detectors (IPRD13) Siena, Italy. Introduction Luminosity from Hit Counting Luminosity from Thermal Neutron Counting van der Meer Scans Conclusions. 16 Medipix[2] (MPX) pixel detectors operating in ATLAS from 2008 to Feb. 2013, acquisition time 0.1ms-600s. For luminosity measurements usage as 65536 (256x256) independent counting detectors. Measure the particle fluxes originating from the LHC proton-proton collisions
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