Author: Peterson, D.W.
Paper Title Page
THPRI028 Acoustic Spark Localization for the 201 MHz RF Cavity 3828
 
  • P.G. Lane, Y. Torun
    Illinois Institute of Technology, Chicago, Illlinois, USA
  • E. Behnke, I.Y. Levine
    Indiana University South Bend, South Bend, USA
  • D.W. Peterson
    Fermilab, Batavia, Illinois, USA
  • P. Snopok
    IIT, Chicago, Illinois, USA
 
  Funding: Work supported by U.S. Department of Energy
Current designs for muon cooling channels require high-gradient RF cavities to be placed in solenoidal magnetic fields in order to contain muons with large transverse emittances. It has been found that doing so reduces the threshold at which RF cavity breakdown occurs. To aid the effort to study RF cavity breakdown in magnetic fields it would be helpful to have a diagnostic tool which can detect breakdown and localize the source of the breakdown inside the cavity. We report here on the experiment setup for localizing sparks in an RF cavity by using piezoelectric transducers and on preparation for data collection on a 201.25 MHz vacuum cavity.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI028  
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THPRI070 Tuner System Simulation and Tests for the 201-MHz MICE Cavity 3927
 
  • L. Somaschini
    INFN-Pisa, Pisa, Italy
  • A.J. DeMello, A.R. Lambert, S.P. Virostek
    LBNL, Berkeley, California, USA
  • J.H. Gaynier, R.J. Pasquinelli, D.W. Peterson, R.P. Schultz
    Fermilab, Batavia, Illinois, USA
  • Y. Torun
    Illinois Institute of Technology, Chicago, Illlinois, USA
 
  Funding: Supported by the US Department of Energy Office of Science through the Muon Accelerator Program.
The frequency of MICE cavities is controlled by pneumatic tuners as their operation is impervious to large magnetic fields. The mechanical and RF transfer functions of the tuner were simulated in ANSYS. The first of these tuning systems was assembled and tested at Fermilab. The mechanical response and the RF tuning transfer function have been measured and compared with simulation results. Finally the failure of different actuators has been simulated and tested to predict the operational limits of the tuner.
 
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI070  
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THPRI071 Instrumentation for Characterizing 201-MHz MICE Cavity at Fermilab 3930
 
  • M. Chung, D.L. Bowring, A. Moretti, R.J. Pasquinelli, D.W. Peterson, R.P. Schultz
    Fermilab, Batavia, Illinois, USA
  • P.G. Lane, Y. Torun
    Illinois Institute of Technology, Chicago, Illlinois, USA
  • L. Somaschini
    INFN-Pisa, Pisa, Italy
 
  A 201-MHz single cavity module is installed in the Mucool Test Area (MTA) of Fermilab to test the performance of the cavity at the design parameters for the International Muon Ionization Cooling Experiment (MICE) particularly in multi-Tesla external magnetic fields. To monitor various aspects of the cavity and to understand detailed physics involved in RF breakdown and multipacting, numerous instrumentation is installed on the cavity module and also in the experimental hall, which includes thermocouples, infrared sensors, electron pickups, fiber light guides, and radiation detectors. In this paper, we will present details of each diagnostic and initial test results.  
DOI • reference for this paper ※ https://doi.org/10.18429/JACoW-IPAC2014-THPRI071  
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