News

| Anonymous | Detector
The LHC is back online! This morning we saw first beams splashes in the CMS experiment as the beam was threaded through the LHC full circle! "This data is already useful to understand details about the behaviour of the new CMS Trigger, and we are…
| campore | Detector
CMS has been taking collision data since the 13TeV startup of the LHC on 3 June. During this period, the CMS magnet has been kept off due to an issue with the cooling system, so the beams have been used to calibrate and time-in the electronics of…
| Anonymous | Detector
  From the CERN Press Release: Today, CERN's Large Hadron Collider (LHC) started delivering physics data for the first time in 27 months. After an almost two year shutdown and several months re-commissioning, the LHC is now providing collisions to…
| Anonymous | Detector
From the CERN website: Last night, protons collided in the Large Hadron Collider (LHC) at the record-breaking energy of 13 TeV for the first time. These test collisions were to set up systems that protect the machine and detectors from particles…
| Anonymous | Detector
At about half past nine CET this morning, for the first time since the Large Hadron Collider (LHC) started up after two years of maintenance and repairs, the accelerator delivered proton-proton collisions to the LHC experiments ALICE, ATLAS, CMS and…
| ebutz | Detector
The Tracker is a subdetector that is located closest to the collision point of the LHC’s particle beams inside the CMS detector. It must face an onslaught of billions of particles flying through it each second of operation. To mitigate the effects…
| achintya | Detector
CMS has many different safety systems installed in the underground experimental area. These are designed to protect the detector and all the associated electronics as well as the cavern itself. In case of fire, the last line of defence is the High…
| tmarriot | Detector
From the CMS experimental site at Cessy, France, located at Point 5 on the LHC ring ————— After a well-deserved Christmas break, work has resumed at Point 5 at an unabated pace. With an extremely busy 2013 behind us, all teams are now focusing their…
| barneyd | Detector
The first part of the CMS endcap calorimetry, as seen by particles coming from interactions in the centre of the detector, is the "ECAL Preshower" or "ES" for short. "ES−" and "ES+" are used to distinguish the two ends of this subsystem. The ES is…
| blutz | Detector
The central hadron calorimeter (HCAL) of CMS consists of the barrel (HB), the endcap (HE), and the outer (HO) regions. The HO consists of one or two scintillator layers and uses the metal of the magnet system as an absorber. So far, the HO has been…
| tetto | Detector
A fourth station –– called RE4 –– will be added to the CMS endcap muon system during the ongoing LHC Long Shutdown (LS1). The CMS muon system consists of three different sub-detectors: RPCs (Resistive Plate Chambers), DT (Drift Tubes) and CSC (…
| abehrens | Detector
CERN’s surveyors conduct diverse measurements to ensure, for example, accurate positioning of magnets, detectors and other equipment. They do so using techniques such as laser tracking and 3D scanning. Two weeks ago, the surveyors were busy…