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Novikov-Borodin, A.V.

Paper Title Page
FPAT020 A Fast Chopper for Intensity Adjustment of Heavy-Ion Beams 1692
 
  • A.V. Novikov-Borodin, V.A. Kutuzov
    RAS/INR, Moscow
  • P.N. Ostroumov
    ANL, Argonne, Illinois
 
  Funding: CRDF Grant.

There are several heavy-ion linac projects being developed worldwide. For example, the Rare Isotope Accelerator Facility [J.A. Nolen, Nucl. Phys. A. 734 (2004) 661] currently being designed in the U.S. will use both heavy-ion and light ion beams to produce radionuclides via the fragmentation and spallation reactions, respectively. With simultaneous beam delivery to more than one target independent adjustment of relative beam intensities is essential. A fast traveling wave chopper can be used to modulate cw beam intensity at low energy ~200 keV/u. Such a device should have high frequency characteristics at high power level. By increasing the wave impedance of the traveling wave structure up to 200 Ohm one can reduce power requirements to the fast voltage pulser. Several design options of the high-impedance structure are discussed.