The installation procedure of an ME+4/2 chamber
News from the CMS experimental site: 22 November 2013
From the CMS experimental site at Cessy, France, located at Point 5 on the LHC ring ————— The past two weeks have seen several pivotal steps taken towards achieving some of the key goals for CMS during the LHC’s first Long Shutdown (LS1). On 21…
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Channel occupancy maps for the positive ECAL endcap before (left) and after (right) the repair. The 75 dead channels (visible in sector +06 of the left-hand plot) are now fully operational.
Performing keyhole surgery on the ECAL endcaps
The CMS Electromagnetic Calorimeter (ECAL) is responsible for measuring electrons and photons produced in collisions inside the detector. It comprises of 75,848 lead-tungstate crystals, each with its own photodetector and electronics to form readout…
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Some of the participants of CMS's first-ever Hangout on Air in Spanish
Spanish schools take virtual tour of CMS cavern
Early in the morning on 22 October, I grabbed my laptop and safety helmet and took the elevator 30 storeys underground to the CMS experimental cavern. But this time it wasn't to work on the maintenance of the Drift Tubes system as in previous weeks…
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A visualisation of public CMS Level-2 data, here showing a proton-proton collision that may have produced a Higgs boson
LHC data to be made public via open access initiative
LHC data are exotic, they are complicated and they are big. At peak performance, about one billion proton collisions take place every second inside the CMS detector at the LHC. CMS has collected around 64 petabytes (or over 64,000 terabytes) of…
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