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superconducting-RF

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IT08 Diagnostic Challenges at SNS diagnostics, H-minus, instrumentation, SNS 35
 
  • M.A. Plum
    LANL, Los Alamos National Laboratory, Los Alamos, NM, USA
  • T.J. Shea, S. Assadi
    ORNL, Oak Ridge National Laboratory, Oak Ridge, TN, USA
  • L. Doolittle
    LBNL, Lawrence Berkeley National Laboratory, Berkeley, CA, USA
  • P. Cameron, R. Connolly
    BNL, Brookhaven National Laboratory, Upton, NY, USA
  The Spallation Neutron Source now being built in Oak Ridge, Tennessee, USA, accelerates an H- ion beam to 1000 MeV with an average power of 1.4 MW. The H- beam is then stripped to H+, compressed in a storage ring to a pulse length of 695 ns, and then directed onto a mercury neutron spallation target. Most of the acceleration is accomplished with superconducting rf cavities. The presence of these cavities, the high average beam power, and the large range of beam intensity in the storage ring, provide unique challenges to the beam diagnostics systems. In this talk we will discuss these challenges and some of our solutions, including the laser profile monitor system, the residual gas ionization profile monitors, and network attached devices. Measurements performed using prototype instrumentation will also be presented.