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Particle beam irradiation system

  • US 7,982,198 B2
  • Filed: 06/29/2009
  • Issued: 07/19/2011
  • Est. Priority Date: 03/29/2006
  • Status: Active Grant
First Claim
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1. A particle beam irradiation system comprising:

  • a synchrotron having an extraction radiofrequency knockout electrode and accelerating and extracting a charged particle beam;

    an irradiation apparatus for radiating the charged particle beam extracted from said synchrotron;

    a radiofrequency signal generation apparatus for generating a radiofrequency signal which is to be applied to the radiofrequency knockout electrode; and

    an extraction control apparatus for controlling said radiofrequency signal generation apparatus,wherein said radiofrequency signal generation apparatus includesfirst amplitude modulation means for modulating the amplitude of the radiofrequency signal during an extraction control period of an operation cycle of said synchrotron, andsecond amplitude modulation means for modulating the amplitude of the radiofrequency signal during each of a plurality of irradiation periods contained in the extraction control period of the operation cycle.

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