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The CMS Phase-1 Pixel Detector Upgrade

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arxiv 2012.14304 v1 pith:3TBDQSRG submitted 2020-12-22 physics.ins-det hep-ex

The CMS Phase-1 Pixel Detector Upgrade

classification physics.ins-det hep-ex
keywords detectorpixelphase-1upgradedbeenoriginalperformanceabsolute
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The CMS detector at the CERN LHC features a silicon pixel detector as its innermost subdetector. The original CMS pixel detector has been replaced with an upgraded pixel system (CMS Phase-1 pixel detector) in the extended year-end technical stop of the LHC in 2016/2017. The upgraded CMS pixel detector is designed to cope with the higher instantaneous luminosities that have been achieved by the LHC after the upgrades to the accelerator during the first long shutdown in 2013-2014. Compared to the original pixel detector, the upgraded detector has a better tracking performance and lower mass with four barrel layers and three endcap disks on each side to provide hit coverage up to an absolute value of pseudorapidity of 2.5. This paper describes the design and construction of the CMS Phase-1 pixel detector as well as its performance from commissioning to early operation in collision data-taking.

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