Design and operation of a multipacting-free 51.4 MHz rf accelerating cavity

Abstract

The operation of the Frascati storage ring rf accelerating cavity, whose design voltage range was intended to be from a few kV to 200 kV, was affected by resonant discharges in the 30–80 kV range. Computer simulations clearly showed high level multipacting discharges located on the end-plates of the resonator. A cavity model was built for investigating appropriate solutions. The design and the construction of a multipacting-free resonator of new shape was successfully carried out. The experimental results are presented in this paper.