27 research outputs found

    Commissioning and performance of the CMS silicon strip tracker with cosmic ray muons

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    During autumn 2008, the Silicon Strip Tracker was operated with the full CMS experiment in a comprehensive test, in the presence of the 3.8 T magnetic field produced by the CMS superconducting solenoid. Cosmic ray muons were detected in the muon chambers and used to trigger the readout of all CMS sub-detectors. About 15 million events with a muon in the tracker were collected. The efficiency of hit and track reconstruction were measured to be higher than 99% and consistent with expectations from Monte Carlo simulation. This article details the commissioning and performance of the Silicon Strip Tracker with cosmic ray muons

    Alignment of the CMS silicon tracker during commissioning with cosmic rays

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    The CMS silicon tracker, consisting of 1440 silicon pixel and 15 148 silicon strip detector modules, has been aligned using more than three million cosmic ray charged particles, with additional information from optical surveys. The positions of the modules were determined with respect to cosmic ray trajectories to an average precision of 3-4 microns RMS in the barrel and 3-14 microns RMS in the endcap in the most sensitive coordinate. The results have been validated by several studies, including laser beam cross-checks, track fit self-consistency, track residuals in overlapping module regions, and track parameter resolution, and are compared with predictions obtained from simulation. Correlated systematic effects have been investigated. The track parameter resolutions obtained with this alignment are close to the design performance

    Phenotypic and Evolutionary Consequences of Deletion, Duplication, and Triplication at 16p11.2

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    Commissioning and performance of the CMS pixel tracker with cosmic ray muons

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    Commissioning of the CMS experiment and the cosmic run at four tesla

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    Commissioning of the CMS High-Level Trigger with cosmic rays

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    Performance study of the CMS barrel resistive plate chambers with cosmic rays

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    Performance of the CMS cathode strip chambers with cosmic rays

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    Performance of the CMS hadron calorimeter with cosmic ray muons and LHC beam data

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    Commissioning and performance of the CMS silicon strip tracker with cosmic ray muons

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