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Smith, T.

Paper Title Page
WEPMN085 The Advanced Photon Source Pulsed Deflecting Cavity RF System 2224
  • A. E. Grelick, A. R. Cours, N. P. Di Monte, A. Nassiri, T. Smith, G. J. Waldschmidt
    ANL, Argonne, Illinois
  Funding: Work supported by the U. S. Department of Energy, Office of Science, Office of Basic Energy Sciences, under Contract No. DE-AC02-06CH11357.

The Phase I Advanced Photon Source Deflecting Cavity System for producing short X-ray pulses uses one multi-cell, S-band cavity to apply a deflecting voltage to the stored electron beam ahead of an undulator that supports a beamline utilizing short picosecond X-rays. Two additional multi-cell cavities are then used to cancel out the perturbation and redirect the electron beam along the path of its nominal orbit. The pulsed rf system driving the deflecting cavities is described. Design tradeoffs are discussed with emphasis on topology considerations and digital control loops making use of sampling technology in a manner consistent with the present state of the art.