DEVELOPMENT OF NON-INVASIVE TRANSVERSE PROFILE MONITORS FOR THE ESS LINAC

The European Spallation Source (ESS) consists of a partly superconducting linac which will deliver a 2 GeV, 5 MW proton beam to a rotating tungsten target. In this way, the ESS will be the world’s most powerful neutron source. To measure the proton beams transverse profile at high intensity, the ESS is developing two types of non-invasive profile devices. The first monitor is based on luminescence of the residual gas, the second one on ionization of the same gas. The latest developments of these profile monitors will be presented.