Radiant energy – Irradiation of objects or material – Ion or electron beam irradiation
Patent
1997-01-17
1998-10-06
Berman, Jack I.
Radiant energy
Irradiation of objects or material
Ion or electron beam irradiation
376112, 315502, A61N 500, H01J 37147
Patent
active
058180583
ABSTRACT:
An acceleration orbit face of particle beam circular acceleration unit is placed at right angles to a rotation shaft of rotation unit for rotating the particle beam circular acceleration unit, beam transport unit, and irradiation field formation unit in one piece. Shields for shielding radiations and magnetism are placed symmetrically with respect to the center axis of the particle beam circular acceleration unit. Shields are placed symmetrically with respect to the center line of the particle beam circular acceleration means, thereby lessening the amount of beams coming in collision with surrounding walls from the beam acceleration orbit, decreasing the radiation leakage amount, lightening the shields, and providing a light particle beam irradiation apparatus.
REFERENCES:
patent: 4112306 (1978-09-01), Nunan
patent: 4641104 (1987-02-01), Blosser et al.
patent: 5349198 (1994-09-01), Takanaka
Blosser, Nuclear Instruments and Methods in Physics Research B40-41(1989) 1326, 1328 (pp. 1327 and 1329-1330 missing).
"The Davis 76-inch Isochronous Cyclotron", Crocker Nuclear Laboratory.
Flanz et al., "The Northeast Proton Therapy Center at Massachusettes General Hospital" (Contributed paper to Fifth Workshop on Heavy Charge Particles in Biology and Medicaine) cited in the specification, Aug., 1995.
Flanz, "Large Medical Gantries" (1995 Particle Accelerator Conference).
Blosser "Applications of Superconduction Cyclotrons" (Twelth International Conference on Cyclotrons and Their Applications) cited in the soecification.
Maruyama Akihiko
Matsuda Tetsuya
Nakanishi Tetsuya
Sato Shinji
Tanaka Hirofumi
Berman Jack I.
Mitsubishi Denki & Kabushiki Kaisha
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