CLIC Magnet Stabilization Studies

One of the main challenges for future linear colliders is producing and colliding high energy e+ e- beams with a transverse spot size at the collision point in the nanometre range (“nanobeams”). The Compact LInear Collider (CLIC), presently under investigation at CERN, aims at colliding e+ e- beams with a vertical spot size of 0.7 nm, at a centre-of-mass energy of 3 TeV. This requires a vertical stability to the 1.3 nm level for the 2600 linac quadrupoles and to the 0.2 nm level for the two final doublets at either side of the interaction point. In the framework of the CLIC Stability Study, it has been demonstrated for the first time that CLIC prototype quadrupoles can be stabilized to the 0.5 nm level in a normal working area on the CERN site.