Author: Takeuchi, Y.
Paper Title Page
WG3028
 HOM Absorbers Using SiC Ceramics for KEKB Normal Conducting Cavity  
 
  • Y. Takeuchi
    KEK, Ibaraki, Japan
  
  KEKB normal conducting cavities are equipped with 2 types of HOM absorbers using SiC ceramics and have been operated successfully over 10 years. One type of these absorbers is waveguide HOM load with bullet shape SiC ceramics and the other is grooved beam pipe type HOM load with SiC tiles. The structures of these HOM loads can be considered as a waveguide partially filled with dielectric material. Therefore the properties of the surface wave modes affect the performance of the absorber strongly. The properties of the surface wave modes in the waveguide HOM load are shown. RF dielectric properties of the SiC ceramics are essential to design HOM absorbers. In this talk, the RF dielectric properties of the SiC ceramics and control of the properties are also discussed.  
slides icon Slides WG3028 [5.523 MB]