Title:
ACCELERATOR, PARTICLE THERAPY SYSTEM, AND CONTROL METHOD
Document Type and Number:
Japanese Patent JP2023087587
Kind Code:
A
Abstract:
To provide an accelerator capable of taking out charged particle beams with precision having desired energy.SOLUTION: An acceleration voltage measurement circuit 10 outputs acceleration voltage signals Vacc as measurement signals of a measured high-frequency voltage for acceleration excited in an acceleration cavity 9. A low-power high-frequency control system 25 inputs RF power for constant frequency control, which is included in a range of a resonant frequency of the acceleration cavity 9, to the acceleration cavity 9 as high-frequency power. The low-power high-frequency control system 25 is configured so as to, when a phase difference between the acceleration voltage signal Vacc and the high-frequency power for control is within a specified value, input High-frequency power for acceleration synchronized with the acceleration frequency, which is the frequency of the acceleration voltage signal Vacc to the acceleration cavity 9 as high-frequency power by feedback control, and after that, when the acceleration frequency reaches an output frequency Fext, stop input of the high-frequency power for acceleration to the acceleration cavity 9.SELECTED DRAWING: Figure 5
Inventors:
HANEE TAKAMITSU
Application Number:
JP2021202064A
Publication Date:
June 23, 2023
Filing Date:
December 13, 2021
Export Citation:
Assignee:
HITACHI LTD
International Classes:
H05H13/02; A61N5/10
Attorney, Agent or Firm:
Patent Attorney Corporation Wilfort International Patent Office
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