The Super Proton Synchrotron (SPS) is back in operation after close to three years of intense maintenance and upgrades. With this milestone behind us, and with only the Large Hadron Collider (LHC) left to restart, it is hard not to be excited about getting back to physics after LS2.

Are all LHC magnets blue? Who decides the colour of a magnet and on what basis? What does the small purple one do? See our answers.

FASER, the Forward Search Experiment, has been installed in the LHC tunnel during Long Shutdown 2. It is currently being tested and will start taking data next year

Upgraded beam lines will support existing and new collaborations in an environmentally savy manner in one of CERN’s oldest facilities.

The Antiproton Decelerator will see refurbishment work that will help its experiments to trap more antimatter than before.

Following our article on the PS Booster, we take a look at the next link in CERN’s accelerator chain: the venerable Proton Synchrotron and its magnet system.

In the first of our series of articles on work done during LS2, we focus on the second link in the accelerator chain, the PS Booster.