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Bross, A.D.

 
Paper Title Page
TU204 Effect of High Solenoidal Magnetic Fields on Breakdown Voltages of High Vacuum 805 MHz Cavities 271
 
  • A. Moretti, A.D. Bross, S. Geer, Z. Qian
    Fermilab, Batavia, Illinois
  • D.M. Errede
    University of Illinois at Urbana-Champaign, Urbana, Illinois
  • D. Li
    LBNL/AFR, Berkeley, California
  • J. Norem
    ANL, Argonne, Illinois
  • R.A. Rimmer
    Jefferson Lab, Newport News, Virginia
  • Y. Torun
    IIT, Chicago, Illinois
  • M.S. Zisman
    LBNL, Berkeley, California
 
  The demonstration of muon ionization cooling by a large factor is necessary to demonstrate the feasilibility of a collider or neutrino factory. An important cooling experiment, MICE [1], has been proposed to demonstrate 10 % cooling which will validate the technology. Ionization cooling is accomplished by passing a high-emittance beam in a multi-Tesla solenoidal channel alternately through regions of low Z material and very high accelerating RF Cavities. To determine the effect of very large solenoidal magnetic fields on the generations of Dark current, X-Rays and breakdown Voltage gradients of vacuum RF cavities, a test facility has been established at Fermilab in Lab G. This facility consists of a 12 MW 805 MHz RF station, and a large bore 5 T solenoidal superconducting magnet containing a pill box type Cavity with thin removable window apertures allowing dark current studies and breakdown studies of different materials. The results of this study will be presented. The study has shown that the peak achievable accelerating gradient is reduced by almost a factor two in a 4 T field.

[1] http://mice.iit.edu/.

 
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