Alignment of the CMS Muon System with Cosmic-Ray and Beam-Halo Muons

Abstract

The CMS muon system has been aligned using cosmic-ray muons collected in 2008 and beam-halo muons from the 2008 LHC circulating beam tests. After alignment, the resolution of the most sensitive coordinate is 80 microns for the relative positions of superlayers in the same barrel chamber and 270 microns for the relative positions of endcap chambers in the same ring structure. The resolution on the position of the central barrel chambers relative to the tracker is comprised between two extreme estimates, 200 and 700 microns, provided by two complementary studies. With minor modifications, the alignment procedures can be applied using muons from LHC collisions, leading to additional significant improvements.

References in corpus (7)

• Alignment of the CMS Silicon Tracker during Commissioning with Cosmic Rays
• Precise Mapping of the Magnetic Field in the CMS Barrel Yoke using Cosmic Rays
• Commissioning of the CMS Experiment and the Cosmic Run at Four Tesla
• Performance of the CMS Cathode Strip Chambers with Cosmic Rays
• Aligning the CMS Muon Chambers with the Muon Alignment System during an Extended Cosmic Ray Run
• CMS Data Processing Workflows during an Extended Cosmic Ray Run
• Parametrization of the Cosmic Muon Flux for the Generator CMSCGEN

Cited by in corpus (10)

• The performance of the CMS muon detector in proton-proton collisions at sqrt(s) = 7 TeV at the LHC
• Performance of CMS Muon Reconstruction in Cosmic-Ray Events
• Precise Mapping of the Magnetic Field in the CMS Barrel Yoke using Cosmic Rays
• Commissioning of the CMS Experiment and the Cosmic Run at Four Tesla
• Performance of the reconstruction and identification of high-momentum muons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Performance of the CMS Drift Tube Chambers with Cosmic Rays
• Measurement of the charge ratio of atmospheric muons with the CMS detector
• Performance of the CMS Level-1 Trigger during Commissioning with Cosmic Ray Muons
• CMS Data Processing Workflows during an Extended Cosmic Ray Run
• Aligning the CMS Muon Chambers with the Muon Alignment System during an Extended Cosmic Ray Run