• Q. Huang, T.B. Holland, A.K. Mukherjee
  UCD, Davis, California
• E.P. Chojnacki, M. Liepe, M. Malloy, M. Tigner
  CLASSE, Ithaca, New York

There are limited choices available for broadband RF absorbing materials compatible with particle accelerator beamline environments, such as for use in higher order mode (HOM) loads. Ceramics and ferrites that have the vacuum, radiation, and particulate compatibility tend to have strong RF absorption over only a decade of frequency once above 1 GHz. Further, their properties often change considerably at cryogenic temperatures for SRF applications. Mixing carbon nanotubes (CNT’s) into a resin matrix has recently shown promise for providing a broader band of RF absorption. Development work has begun for mixing CNT’s into a ceramic matrix for compatibility with cryogenic accelerator beamlines. The status of the material development and tests will be presented.