Radiant energy – Irradiation of objects or material – Ion or electron beam irradiation
Patent
1989-06-15
1991-04-30
Berman, Jack I.
Radiant energy
Irradiation of objects or material
Ion or electron beam irradiation
2504921, 2504922, G21K 1043
Patent
active
050121111
ABSTRACT:
An ion-beam irradiation apparatus is provided which has x- and y-deflection magnets to wobble an ion beam for uniformly irradiating a field exceeding the beam diameter in size. An exciting current is supplied to the x- and y-deflection magnets independently, and the exciting current inlcudes both an ac component and a dc bias component. Suitable control of these components enables the irradiated field to be varied in shape and location. In particular, racetrack-shaped fields can be irradiated by adding dc components to triangular ac components. When used in cancer radio therapy, this apparatus enables the irradiated field to be moved quickly from one location to another, and to be matched with the shape of the tumor. Benefits of this apparatus include short treatment times and efficient use of the ion beam, so that substantially all of the ion beams may be delivered to the target.
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Article Entitled "A Kicker Magnet for Sweeping Ion Beams From a Medical Cyclotron", revised Dec. 30, 1986.
Article Entitled "Industrical Electron Accelerators and Applications", pp. 193-201, Published in Moscow 1986.
Wobbler Facility for Biomedical Experiments at the Bevalac, Timothy R. Renner and William T. Chu Med. Phys. 14 (5) Sep./Oct. 1987.
Wobbler Facility for Biomedical Experiments at the Bevalac W. T. Chu, S. B. Curtis, J. Llacer, T. R. Renner, and R. W. Sorensen IEEE Transactions on Nuclear Science, vol. NS-32, No. 5, Oct. 1985.
Berman Jack I.
Mitsubishi Denki & Kabushiki Kaisha
Nguyen Kiet T.
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