Patent Number: 
Section: claims

1. A high-frequency control device for an accelerator to control a high frequency which is applied to an acceleration cavity of an accelerator which generates a particle beam to be used for a particle beam therapy, wherein the high-frequency control device for an accelerator comprises:a hard disk drive memory which stores pattern data of a high frequency to be applied for each combination of energy and intensity of the generated particle beam;a local memory, which reads a plurality of pattern data of a high frequency for each patient together with a sequential order of changing energy and intensity from the hard disk drive memory, and stores data in order to perform a scanning irradiation method in which a layered particle beam irradiation region in a depth direction of an affected part of the patient is formed sequentially by changing energy and intensity of the particle beam sequentially to irradiate the affected part of the patient which is an irradiation subject with the particle beam, and which reads out data faster than the hard disk drive memory, anda command value checking part which checks whether a command value from an irradiation system control device, which controls a particle beam irradiation device for irradiating the affected part which is the irradiation subject for each time when energy and intensity of the particle beam is changed, is in agreement with pattern data which is sent out from the local memory or not,wherein in a case where it is judged that a command value from the irradiation system control device is not in agreement with pattern data which is sent out from the local memory, the accelerator is operated according to subsequent pattern data of energy and intensity, and during the operation, data in the local memory is reread until the data pattern is in agreement with the command value. 2. A particle beam therapy system comprising the accelerator, a particle beam transportation system which transports a particle beam which is extracted from the accelerator, and a particle beam irradiation device for irradiating the particle beam which is transported onto the irradiation subject,wherein a high frequency which is applied to the acceleration cavity of the accelerator is controlled by a high-frequency control device according to claim 1.