The CMS Phase-1 pixel detector upgrade
Journal
Journal of Instrumentation
Journal Volume
16
Journal Issue
2
Date Issued
2021
Author(s)
Abstract
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. ? 2021 CERN for the benefit of the CMS Tracker collaboration..
Subjects
Pixels; Readout systems; Absolute values; Barrel layers; CMS detectors; Design and construction; Pixel detector; Pseudorapidities; Silicon pixel detector; Tracking performance; Phase comparators
Type
journal article