In preparation for the civil engineering work on the HL-LHC at CERN, vibration measurements were carried out at the LHC’s Point 1 last month. These measurements help evaluate how civil engineering work could impact the beam, and will provide crucial details about the site’s geological make-up before construction begins.
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Geophone sensors to measure vibrations in the ground were placed around the vibration sources at the surface, linked to the underground geophones using the LHC “White Rabbit” synchronisation network. This allowed the team to look at the effects of the vibrations at the same time.

Read more in the CERN Bulletin article Pickin’ up good vibrations.