Method and apparatus for uniform charged particle irradiation of

Details Method and apparatus for uniform charged particle irradiation of Method and apparatus for uniform charged particle irradiation of

1986-10-08

1988-04-05

Fields, Carolyn E.

Radiant energy

With charged particle beam deflection or focussing

Magnetic lens

250396R, 2504923, G21K 1093

Patent

active

047361069

ABSTRACT:
A method and apparatus which uses combined quadrupole (Qx and Qy) and multipole magnet sets (Mx and My) to focus a charged particle beam from a point source is described. Primarily the multipole magnet sets are octupole magnets. The apparatus is particularly useful for providing a uniform intensity for ion implantation, in cancer therapy and in other fields where uniform charged particle irradiation of a surface is important.

REFERENCES:
patent: 3028491 (1962-04-01), Schleich
patent: 3482136 (1969-12-01), Herrera
E. Segre, Nuclei and Particles, W. A. Benjamin, Inc., New York, pp. 39-49, (1969).
Koehler et al., Medical Physics, 4, 297, (1977).
D. Cary, `Turtle`, Fermi Nat'l. Accelerator Lab., Report 64-2041.000.

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