“School of Particles”

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Paper   IPM / Particles / 8934
School of Particles and Accelerator
  Title:   The CMS experiment at the CERN LHC
1.  Hessamaddin Arfaei
2.  Majid Hashemi
3.  Mojtaba Mohammadi Najafabadi
4.  Ahmad Moshaii
5.  Saeid Paktinat
  Status:   Published
  Journal: Journal of Instrumentation
  Vol.:  3
  Year:  2008
  Pages:   1-361
  Supported by:  IPM
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 lead-lead)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-magneticfield 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|\leqslant5) 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 12500t.

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