LHC experiment’s heart transplant

Watch an LHC experiment’s heart transplant

CMS Pixel Insertion (Image: CERN)


Today, at CERN, physicists and engineers are starting to replace the heart of one of the LHC experiments. The main part of the operation will be on Thursday 2 March. This highly complex operation, 100m underground is one of the most significant milestones ahead of the Large Hadron Collider (LHC) restart this spring.


CMS is one of the four main detectors on the 27km LHC accelerator. The heart of the CMS experiment is the pixel detector. The operation deep in the underground cavern will improve CMS’s ability to measure precise properties of the Standard Model, including the properties of the Higgs boson. From 2016, the LHC has been delivering a larger number of simultaneous collisions and the new pixel detector allows the data to be recorded more efficiently. This replacement, planned many years in advance, is part of the lifecycle of particle detectors.


The LHC and its experiments are currently undergoing maintenance and consolidation before the LHC awakens this spring and begins colliding particles once more at close to the speed of light.


A Video News Release will be available via EBU (European Broadcasting Union), on Thursday 2 March at 16:30 GMT.

Satellite details:

Please log into https://www.eurovision.net/ and click on Synopsis for technical parameters of this transmission.


Footage of the operation will be available here.


Photos of the operation will be available here.


You can also watch CERN’s first Facebook live on Thursday 2 March at 11h15 GMT.

Type of event


Event Date

2 Mar 2017, 09.00 - 17.00


CMS experiment at CERN

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