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The ATLAS Inner Detector commissioning and calibration

The ATLAS Inner Detector commissioning and calibration,10.1140/epjc/s10052-010-1366-7,European Physical Journal C,Georges Aad

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The ATLAS Inner Detector commissioning and calibration   (Citations: 2)
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The ATLAS Inner Detector is a composite tracking system consisting of silicon pixels, silicon strips and straw tubes in a 2 T magnetic field. Its installation was completed in August 2008 and the detector took part in data-taking with single LHC beams and cosmic rays. The initial detector operation, hardware commissioning and in-situ calibrations are described. Tracking performance has been measured with 7.6 million cosmic-ray events, collected using a tracking trigger and reconstructed with modular pattern-recognition and fitting software. The intrinsic hit efficiency and tracking trigger efficiencies are close to 100%. Lorentz angle measurements for both electrons and holes, specific energy-loss calibration and transition radiation turn-on measurements have been performed. Different alignment techniques have been used to reconstruct the detector geometry. After the initial alignment, a transverse impact parameter resolution of 22.1±0.9 mum and a relative momentum resolution sigma p / p=(4.83±0.16)×10-4 GeV-1× p T have been measured for high momentum tracks.
Journal: European Physical Journal C - EUR PHYS J C , vol. C70, no. 3, pp. 787-821, 2010
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    • ...The innermost part of the ATLAS detector [3] used for this analysis is a silicon tracker, comprised of a pixel detector at the center and a silicon strip detector (SCT) surrounding it. The pixel detector consists of three barrel layers, the innermost one at 5 cm from the interaction region, and three disks at each endcap for a total of over 80 million pixel channels, mostly 50 m 400 m in size...

    D. W. Miller. Online measurement of LHC beam parameters with the ATLAS High-Level Tr...

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