Design of the PS longitudinal damper

The longitudinal damper cavity for the new coupled-bunch feedback of the PS machine has to provide a correcting RF voltage to the circulating bunches to suppress the excitation of bunch oscillations. In the framework of the LHC Injector Upgrade (LIU) project, it has been decided to install a dedicated wideband kicker cavity (0.5-5.5MHz) driven by solid-state amplifiers and providing up to 5 kV peak RF voltage. This paper describes the beam characteristics, the high power system requirements, its design and the foreseen protections.