Power converters for the ISIS second target station Project (TS-2)

The Extract Proton Beamline to the ISIS second target station will require magnets to be powered by ac/dc power converters. A total of 56 magnets, quadrupole and dipole, require high stability dc current converters over a large dynamic range from 1.5kW to 680kW. There is also a requirement for two 10Hz pulsed magnets to extract the proton beam from the present 50Hz target beamline and hence specially designed power supplies are necessary. This paper describes the power converter requirements, types of topology considerations and evaluation criteria.