Cryostat for Testing RF Power Couplers

  • M. Kuchnir
  • M. S. Champion
  • K. P. Koepke
  • J. R. Misek
Part of the A Cryogenic Engineering Conference Publication book series (ACRE, volume 41)


Similar to the power leads of accelerator superconducting magnets, the power couplers of accelerator superconducting cavities are components that link room temperature to superfluid helium temperature for the purpose of energy transfer. Instead of conducting kiloamperes of current they guide megawatts of RF power between those two temperatures. In this paper we describe a cryostat designed for testing the performance of these components and measuring their heat loads. A special feature of this cryostat is its minimum liquid inventory that considerably simplifies safety related requirements. This cryostat is part of a Fermilab facility contributing to the international collaboration working on TESLA (TeV Electron Superconducting Linear Accelerator). This facility is now operational and we will be presenting specifications as well as performance data on the cryostat as well as the first pair of power couplers tested with it.


Heat Load Resonant Ring Ultra High Vacuum Power Coupler Metal Valve 
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  1. 1.
    H. T. Edwards, TESLA Parameters Update — A Progress Report on the TESLA Collider Design, in: “6th Workshop on RF Superconductivity,” R.M. Sundelin, ed., CEBAF, Newport News, VA (1993), vol. 1, p. 361.Google Scholar
  2. 2.
    M. Kuchnir, J. D. Gonczy, J. L. Tague, Measuring heat leak with a heatmeter, in: “Advances in Cryogenic Engineering,” vol. 31, Plenum Press, New York, (1986), p. 1285.Google Scholar
  3. 3.
    J. Graber et al., High peak power RF processing studies of 3 GHz niobium cavities, in: “5th Workshop on RF Superconductivity,” D. Proch, ed., DESY, Hamburg (1991), vol. 2, p. 758.Google Scholar
  4. 4.
    M. Kuchnir, Fabrication of cryogenic electrical feedthroughs, Fermilab TM-596 (1975).Google Scholar
  5. 5.
    S. J. Colloco, Cryogenics, 327 (1983).Google Scholar
  6. 6.
    R. W. Goodwin, M. J. Kucera, M. F. Shea, Nucl. Instr. and Meth. in Phys. Res. A 352, 189 (1994).CrossRefGoogle Scholar
  7. 7.
    R.D. Oberholtzer and B.M. Wisner — private communicationGoogle Scholar
  8. 8.
    R.W. Goodwin — private communicationGoogle Scholar
  9. 9.
    R. E. Peters — private communicationGoogle Scholar

Copyright information

© Plenum Press, New York 1996

Authors and Affiliations

  • M. Kuchnir
    • 1
  • M. S. Champion
    • 1
  • K. P. Koepke
    • 1
  • J. R. Misek
    • 1
  1. 1.Fermi National Accelerator LaboratoryBataviaUSA

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