FIRST MEASUREMENTS ON THE 325 MHz SUPERCONDUCTING CH CAVITY

At the Institute for Applied Physics (IAP), Frankfurt University, a superconducting 325 MHz CH-Cavity has been designed and built. This 7-cell cavity has a geo- metricalof 0.16 corresponding to a beam energy of 11.4 AMeV. The design gradient is 5 MV/m. Novel fea- tures of this resonator are a compact design, low peak fields, easy surface processing and power coupling. Fur- thermore a new tuning system based on bellow tuners in- side the resonator will control the frequency during oper- ation. After successful rf tests in Frankfurt the cavity will be tested with a 10 mA, 11.4 AMeV beam delivered by the GSI UNILAC. In this paper first measurements and corre- sponding simulations will be presented.