Particle beam irradiation system
First Claim
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.
0 Assignments
0 Petitions
Accused Products
Abstract
It is an object of the present invention to provide a charged particle beam extraction method and particle beam irradiation system that make it possible to exercise intensity control over an extracted ion beam while a simple device configuration is employed. To accomplish the above object, there is provided a particle beam irradiation system comprising: a synchrotron for accelerating and extracting an charged particle beam; an irradiation apparatus for extracting the charged particle beam that is extracted from the synchrotron; first beam intensity modulation means for controlling the beam intensity of the charged particle beam extracted from the synchrotron during an extraction control period of an operation cycle of the synchrotron; and second beam intensity modulation means for controlling the beam intensity during each of a plurality of irradiation periods contained in the extraction control period of the operation cycle.
-
Citations
10 Claims
-
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 includes first amplitude modulation means for modulating the amplitude of the radiofrequency signal during an extraction control period of an operation cycle of said synchrotron, and second 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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
Specification