RF CHARACTERISTICS OF THE BULLET-SHAPE SiC ABSORBER FOR KEKB

摘要

Sixteen bullet-shape sintered SiC (silicon carbide) ceramics were used as the HOM absorbers for a prototype of KEK B-factory (KEKB) normal conducting cavity[1]. RF simulations show that the reflection rate from the SiC absorber increases abruptly when the frequency decreases under 1GHz. This behavior can be explained as the attenuation property of a cylindrical dielectric waveguide. The RF characteristics of the SiC absorber are discussed by analyzing properties of the cylindrical dielectric waveguide.