WIRE SCANNER DESIGN FOR THE EUROPEAN SPALLATION SOURCE

The European Spallation Source (ESS) [1] , to be built in the south of Sweden, will use a 2 GeV superconducting linac to produce the worlds most powerful neutron source with a beam power of 5 MW. The beam power is a challenge for interceptive beam diagnostics like wire scanner, the thermal load on intercepting devices implies to reduce the beam power in order to preserve the device integrity. For nominal operation, non-disturbing technics for profile measurements are planned, while for commissioning phase, accurate measurements and cross checking, wire scanners will be used. This paper describes the preliminary design of the wire scanner system in the normal conducing linac as well as in the superconducting linac.