ACCELERATOR AND PARTICLE BEAM THERAPY SYSTEM

To provide an accelerator capable of improving an ion beam extraction efficiency, and provide a particle beam therapy system.SOLUTION: An accelerator that is accelerated by a main magnetic field and an acceleration high frequency magnetic field while circulating an ion beam, includes a plurality of...

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Bibliographic Details
Main Authors HORI TOMOCHIKA, NISHIDA KENTO
Format Patent
LanguageEnglish
Japanese
Published 25.01.2024
Subjects
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
ELECTROTHERAPY
GAMMA RAY OR X-RAY MICROSCOPES
HUMAN NECESSITIES
HYGIENE
IRRADIATION DEVICES
MAGNETOTHERAPY
MEDICAL OR VETERINARY SCIENCE
NUCLEAR ENGINEERING
NUCLEAR PHYSICS
PHYSICS
PLASMA TECHNIQUE
PRODUCTION OF ACCELERATED ELECTRICALLY-CHARGED PARTICLES OR OFNEUTRONS
PRODUCTION OR ACCELERATION OF NEUTRAL MOLECULAR OR ATOMICBEAMS
RADIATION THERAPY
TECHNIQUES FOR HANDLING PARTICLES OR IONISING RADIATION NOTOTHERWISE PROVIDED FOR
ULTRASOUND THERAPY
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Summary:To provide an accelerator capable of improving an ion beam extraction efficiency, and provide a particle beam therapy system.SOLUTION: An accelerator that is accelerated by a main magnetic field and an acceleration high frequency magnetic field while circulating an ion beam, includes a plurality of magnetic poles 8 and 9 arranged so as to be opposite each other; a main magnetic field magnet exciting the main magnetic field in a space nipped by each magnetic pole; a magnetic channel 1019 that takes out the ion beam toward an external part of the magnetic field magnet from an inner part of the main magnetic field magnet; a variation part that makes the ion beam circulated to a main magnetic filed region where the main magnetic field is excited variate to the outer side of the main magnetic field region; and a disturbance magnetic field region that is provided to an outer peripheral part of the main magnetic field region, applies disturbance to the ion beam deviated to the outer side, and excites a magnetic field for conducting it to a magnetic channel. The magnetic channel comprises a predetermined mechanism 50 that suppresses a magnetic field inclination generated on a radial diameter inner side in the circumference region of the ion beam.SELECTED DRAWING: Figure 13 【課題】イオンビーム取り出し効率を向上させることが可能な加速器および粒子線治療システムを提供する。【解決手段】主磁場及び加速用高周波電場によって、イオンビームを周回させながら加速する加速器は、互いに対向して配置される複数の磁極８，９を有し、各磁極に挟まれた空間に主磁場を励起させる主磁場磁石と、主磁場磁石の内部から主磁場磁石の外部へ向けてイオンビームを取り出す磁気チャネル１０１９と、主磁場が励起されている主磁場領域を周回するイオンビームを主磁場領域の外側に変位させる変位部と、主磁場領域の外周部に設けられ、外側に変位されたイオンビームに擾乱を与えて磁気チャネルに導く磁場を励起させる擾乱磁場領域と、を有し、磁気チャネルは、イオンビームの周回領域において径方向内側に発生する磁場勾配を抑制する所定の機構５０を備える。【選択図】図１３
Bibliography:Application Number: JP20220112290