The CMS experiment at the CERN LHC

Authors

• S. Chatrchyan, Yerevan Physics Institute, Yerevan, Armenia
• Kenneth A. Bloom, University of Nebraska-LincolnFollow
• Brian Bockelman, University of Nebraska-LincolnFollow
• Daniel R. Claes, University of Nebraska-LincolnFollow
• Aaron Dominguez, University of Nebraska-LincolnFollow
• Michael Eads, University of Nebraska-LincolnFollow
• Makoto Furukawa, University of Nebraska-LincolnFollow
• J. Keller, University of Nebraska-LincolnFollow
• T. Kelly, University of Nebraska-Lincoln
• Carl Lundstedt, University of Nebraska-LincolnFollow
• Sudhir Malik, University of Nebraska-LincolnFollow
• Gregory Snow, University of Nebraska-LincolnFollow
• David R. Swanson, University of Nebraska-LincolnFollow
• CMS Collaboration

Document Type

Article

Date of this Version

2008

Comments

Published in Journal of Instrumentation 3 (2008) S08004; doi: 10.1088/1748-0221/3/08/S08004 (U.S. Government document) See page XX for University of Nebraska-Lincoln authors.

Abstract

The Compact Muon Solenoid (CMS) detector is described. The detector operates at the Large Hadron Collider (LHC) at CERN. It was conceived to study proton-proton (and leadlead) collisions at a centre-of-mass energy of 14 TeV (5.5 TeV nucleon-nucleon) and at luminosities up to 10³⁴ cm^-2s^-1 (10²⁷ cm^-2s^-1). At the core of the CMS detector sits a high-magnetic field and large-bore superconducting solenoid surrounding an all-silicon pixel and strip tracker, a lead-tungstate scintillating-crystals electromagnetic calorimeter, and a brass-scintillator sampling hadron calorimeter. The iron yoke of the flux-return is instrumented with four stations of muon detectors covering most of the 4π solid angle. Forward sampling calorimeters extend the pseudorapidity coverage to high values (|η| ≤ 5) assuring very good hermeticity. The overall dimensions of the CMS detector are a length of 21.6 m, a diameter of 14.6 m and a total weight of 12500 t.