DESIGN OF L-BAND SUPERCONDUCTING CAVITY FOR THE ENERGY RECOVERY LINACS

Abstract

For the energy recovery linacs (ERLs), strong higherorder-mode (HOM) damping is indispensable to achieve high current operations. For this aim, we have designed L-band superconducting cavity which is optimized for the ERL operations. New cavity cell shape is designed. The HOMs are damped with microwave absorbers mounted on large beampipes. A new idea of eccentric fluted beampipe is proposed. Design concepts and estimated HOM characteristics are described in this paper.