StarkingBarfish posted:

Stopping the beam is pretty cool- There are 'beam dumps', one for each beam, sitting on a junction off the ring. These are massive blocks of carbon surrounded in concrete and cooled with water. In case of an emergency, battery powered 'kicker' magnets kick the beam out of the ring and along to the beam dumps. The energy released as the beam slams into the carbon is enough to raise it to several hundred degrees, and the beam must be moved in an 'e' shape around the block to stop it from burning one place only.