Abstract

This paper describes a new 500 MHz cavity which has a simple damped structure for the 2.0 GeV high-brilliant synchrotron radiation source. The damping of higher-order modes (HOMs) is achieved by large hole beam ducts, a part of which is made of microwave absorber. We have adopted as the microwave absorber a sintered SiC named CERASIC-B manufactured by Toshiba Ceramics Co. Ltd. The latest design of the cavity with CERASIC-B beam ducts is presented in this paper. We have fabricated a prototype model of the cavity. The results of the low power measurement are also reported here. It was confirmed that by using the CERASIC-B beam ducts the Q values of HOMs were strongly damped.

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