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Dooling, J.C.

Paper Title Page
MOPEC063 Wideband Low-output Impedance RF System for the ISIS Second Harmonic Cavity 609
 
  • Y. Irie, S. Fukumoto, K. Muto, H. Nakanishi, A. Takagi
    KEK, Ibaraki
  • D. Bayley, I.S.K. Gardner, R.J. Mathieson, A. Seville, J.W.G. Thomason
    STFC/RAL/ISIS, Chilton, Didcot, Oxon
  • J.C. Dooling, D. Horan, R. Kustom, M.E. Middendorf
    ANL, Argonne
  • T. Oki
    Tsukuba University, Ibaraki
  
 

A low-output-impedance RF system for the second harmonic cavity in the ISIS synchrotron has been developed by collaboration between Argonne National Laboratory (US), KEK (Japan) and Rutherford Appleton Laboratory (UK). The system has less than 30 Ω of output impedance over wide frequency range of 2.7-6.2 MHz. However, distortions of voltage waveform in the driver stage have been a long-standing issue. It was found such distortions were generated depending upon the higher-order-modes of the anode-choke impedance. In this report, method to realize the smooth sinusoidal waveform in the wideband system is presented.