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Alignment of the CMS muon system with cosmic-ray and beam-halo muons
(Journal of Instrumentation, 2010)
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 ...
Commissioning of the CMS experiment and the cosmic run at four tesla
(Journal of Instrumentation, 2010)
The CMS Collaboration conducted a month-long data-taking exercise known as the Cosmic Run At Four Tesla in late 2008 in order to complete the commissioning of the experiment for extended operation. The operational lessons ...
Performance of the CMS Level-1 trigger during commissioning with cosmic ray muons and LHC beams
(Journal of Instrumentation, 2010)
The CMS Level-1 trigger was used to select cosmic ray muons and LHC beam events during data-taking runs in 2008, and to estimate the level of detector noise. This paper describes the trigger components used, the algorithms ...
Forward instrumentation for ILC detectors
(Journal of Instrumentation, 2010)
Two special calorimeters are foreseen for the instrumentation of the very forward region of the ILC detector, a luminometer designed to measure the rate of low angle Bhabha scattering events with a precision better than ...
Performance of the CMS cathode strip chambers with cosmic rays
(Journal of Instrumentation, 2010)
The Cathode Strip Chambers (CSCs) constitute the primary muon tracking device in the CMS endcaps. Their performance has been evaluated using data taken during a cosmic ray run in fall 2008. Measured noise levels are low, ...
Alignment of the CMS silicon tracker during commissioning with cosmic rays
(Journal of Instrumentation, 2010)
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 ...
Radiation hardness qualification of PbWO4 scintillation crystals for the CMS Electromagnetic Calorimeter
(Journal of Instrumentation, 2010)
Ensuring the radiation hardness of PbWO4 crystals was one of the main priorities during the construction of the electromagnetic calorimeter of the CMS experiment at CERN. The production on an industrial scale of radiation ...
Commissioning and performance of the CMS silicon strip tracker with cosmic ray muons
(Journal of Instrumentation, 2010)
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 ...
Performance of CMS muon reconstruction in cosmic-ray events
(Journal of Instrumentation, 2010)
The performance of muon reconstruction in CMS is evaluated using a large data sample of cosmic-ray muons recorded in 2008. Efficiencies of various high-level trigger, identification, and reconstruction algorithms have been ...
Aligning the CMS muon chambers with the muon alignment system during an extended cosmic ray run
(Journal of Instrumentation, 2010)
The alignment system for the muon spectrometer of the CMS detector comprises three independent subsystems of optical and analog position sensors. It aligns muon chambers with respect to each other and to the central silicon ...