University of Wisconsin-Madison Physical Sciences Lab

CMS Upgrades and Repairs for More Energy

Tuesday, October 29th, 2013

Since the discovery of the Higgs boson last year, the Large Hadron Collider (LHC) has shut down for upgrades. These upgrades, during what CERN calls Long Shutdown 1 (LS1), will more than double the energy of the LHC from 7 trillion electron volts (TeV) to 15 TeV.

During LS1, the LHC is also doing repairs. Recently PSL engineer Dan Wenman went to CERN to do some repairs on the Compact Muon Solenoid (CMS). One of the repairs performed was to fix some cathode strip chambers (CSC), which detect the position of passing muon particles.

The CSCs were removed using a PSL-designed apparatus, nicknamed the “Bart-o-Matic”, which is designed specifically to hold the chambers during installation and removal.