CERN Chopper final report

In the framework of HIPPI and the CERN Superconducting Proton Linac studies, the design for a beam chopper has been carried out. It is an integral part of the medium energy line and has to establish the required time structure of the beam by cutting out selected bunches from the continuous bunch train coming out of the 3 MeV RFQ. Due to the bunch spacing of 2.84 ns a system rise and fall time of 2 ns is required. The design, prototyping and testing of the slow wave structure used as kicker as well as that of the pulse generators required to drive it are reported.