CMS is one of the four main experiments at the Large Hadron Collider at CERN.
Like ATLAS, CMS is a general purpose detector designed to investigate a wide range of physics including supersymmetry, extra dimensions and particles that could make up dark matter.
The scientific goals for the two experiments are the same, but they use different technical solutions. These similar science goals, but different designs allow the two experiments to cross-check results and confirm exciting discoveries such as a Higgs boson.
|About the detector|
|Size||21m long, 15 m high and 15 m wide|
|Design||Barrel plus endcaps|
|About the people|
|Collaboration||3820 people including physicists engineers, technicians, students and support staff|
|Number of institutes||182|
|Number of countries||42|
|Number of UK institutes||4|
The CMS detector is built around a huge solenoid magnet. This takes the form of a cylindrical coil of superconducting cable that generates a field of 4 tesla (about 100,000 times the magnetic field of the Earth). The field is confined by a steel ‘yoke’ that forms the bulk of the detector’s 12,500-tonne weight.
How does CMS work
Unlike the other LHC experiments, CMS was constructed in 15 sections at ground level. Each section was lowered 100m into the underground cavern near Cessy in France and reassembled.
The dramatic descent of the central section of the CMS detector
The detector can be opened to allow maintenance and upgrade.
CMS is Moving
Last updated: 27 June 2019