Author: Shemelin, V.D.
Paper Title Page
THPRI111 Higher Order Mode Absorbers for High Current ERL Applications 4037
 
  • R.G. Eichhorn, J.V. Conway, Y. He, Y. Li, T.I. O'Connel, P. Quigley, J. Sears, V.D. Shemelin
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
 
  Efficient damping of the higher-order modes (HOMs) of the superconducting cavities is essential for any high current linac, especially for the proposed energy recovery linac at Cornell that aims for high beam currents and short bunches. This contribution will present the design and first result on the HOM absorbers built for the Main Linac Cryomodule (MLC).  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI111  
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THPRI112 Basic Research on RF Absorbing Ceramics for Beam Line HOM Absorbers 4040
 
  • R.G. Eichhorn, P. Quigley, V.D. Shemelin
    Cornell University (CLASSE), Cornell Laboratory for Accelerator-Based Sciences and Education, Ithaca, New York, USA
  • M. Carty
    Alfred University, Alfred, New York, USA
  • J. Matteson, A. Rae
    NanoMaterials Innovation Center LLC, Painted Post, USA
 
  Higher Order Mode (HOM) absorbers for future high current machines have been a challenging component for many years. Even though many different materials are commercially, none of them seems to fully qualify for accelerator applications. Some of them are brittle or chippy, others porous, have small bandwidth of absorption, a high dc resistivity leading to charge-up or are unreliable in terms of batch to batch variations. Alfred University and Cornell University have recently partnered in developing a dedicated absorber ceramic material that tries to overcome these limitations. We will report on results from small samples of different compositions we produced based on SiC, graphene and graphite.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI112  
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