Enrico Cenni

Multipactor Simulations in 650 MHz Superconducting Spoke Cavity for an Electron Accelerator

To realize a compact industrial-use X-ray source with the laser-Compton scattering, a 325MHz superconducting spoke cavity for an electron accelerator operated at 4K is under development. Design-optimizations of the first prototype cavity were finished. Multipactor simulations were carried out as parts of optimization efforts. In this paper, procedures of multipactor simulations by using CST studio suite are briefly introduced. Then results of simulations and analyses to extract an optimum geometry are presented. A relation between a cavity geometry and an intensity of multipactor is also commented.

Design and Development of Superconducting Spoke Cavity for Compact Photon Source

The spoke cavity is expected to have advantages for compact ERL accelerator for X/-ray source based on laser Compton scattering. We have been developing the spoke cavity under a research program of MEXT, Japan to establish the fabrication process. Since our designed shape of the spoke cavity is complicated due to optimization of the RF properties, we have been designing the mold including the process of press forming and the support parts for vacuum tolerance with the mechanical simulation. In this paper we present status of the spoke cavity fabrication.