ACCELERATOR, PARTICLE BEAM THERAPY SYSTEM, AND CONTROL METHOD

WIPO Patent Application WO/2023/112383

A1

Provided is an accelerator that can produce, with good accuracy, a charged particle beam having a desired energy level. An acceleration voltage measuring circuit (10) outputs an acceleration voltage signal (Vacc) as a measurement signal obtained by measuring a high-frequency acceleration voltage excited in an acceleration cavity (9). A low-power high-frequency control system (25) inputs, as high-frequency power into the acceleration cavity (9), a high-frequency control power of a constant frequency included in a range of resonant frequencies of the acceleration cavity (9). When the phase difference between the acceleration voltage signal (Vacc) and the high-frequency control power is within a prescribed value, the low-power high-frequency control system (25) inputs, into the acceleration cavity (9), a high-frequency acceleration power synchronized to an acceleration frequency, which is the frequency of the acceleration voltage signal (Vacc), as high-frequency power through feedback control. Subsequently, if the acceleration frequency reaches an output frequency (Fext), the low-power high-frequency control system (25) stops input of the high-frequency acceleration power into the acceleration cavity (9).

HAE TAKAMITSU (JP)

PCT/JP2022/030802

June 22, 2023

August 12, 2022

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HITACHI LTD (JP)

H05H13/02; A61N5/10

JP2020202015A	2020-12-17
JP2020038797A	2020-03-12
JP2019133745A	2019-08-08
JP2021035467A	2021-03-04
JP2021007645A	2021-01-28
JP2008507826A	2008-03-13
JP2011507151A	2011-03-03

WILLFORT INTERNATIONAL PATENT FIRM (JP)

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