Magnetic deflecting and focusing device for a charged particle b

Details Magnetic deflecting and focusing device for a charged particle b Magnetic deflecting and focusing device for a charged particle b

1974-06-19

1977-11-01

Church, Craig E.

Radiant energy

With charged particle beam deflection or focussing

Magnetic lens

250493, H01J 314

Patent

active

040567281

ABSTRACT:
This device makes it possible to achieve upon a target of predetermined position, the simultaneous focusing of a beam of accelerated particles, in two mutually perpendicular planes, this, whatever the energies of said particles. The device comprises two electromagnets E.sub.1 and E.sub.2 whose entry and exit faces are parallel with one another, and a third electromagnet E.sub.3 whose entry and exit faces are at an angle .gamma.. Relationships are given to determine the different parameters defining the dimensions and positions of the electromagnets in relation to one another being linked by determinate relationships. The device can be utilized in physical and biological researches, as well as in medical irradiation units.

REFERENCES:
patent: 3287584 (1966-11-01), Pinel
patent: 3360647 (1967-12-01), Avery
patent: 3448263 (1969-06-01), Boutet
patent: 3660658 (1972-05-01), LeBoutet

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