Methods of steering and focusing ion and electron beams

Details Methods of steering and focusing ion and electron beams Methods of steering and focusing ion and electron beams

1985-12-26

1987-09-15

Scott, Jr., Leon

Coherent light generators

Free electron laser

372101, 372 37, 372 74, 315 541, 315 5, H01S 300

Patent

active

046944575

ABSTRACT:
An ion or electron beam is steered or focussed by a circular magnetic field produced by passing a large electrical current through a straight conducting wire, the magnetic field being co-axial with the wire. Annular beams of charged particles coaxial with the straight wire can be focussed onto a circular spot or, depending upon the entry radius of the annular beam and the magnetic field strength, can be induced to follow a looping trajectory. The effect of the steering or focussing system can be enhanced by the provision of a cylindrical conductor which is co-axial with the straight conducting wire and maintained at a voltage sufficient to produce the desired particle trajectory such that the particle beam passes between the wire and the cylindrical conductor. The beam steering or focussing systems is applicable to the fields of beam current density intensification, ion implantation, ion separation and free electron lasers.

REFERENCES:
patent: 4392078 (1983-07-01), Noble et al.
patent: 4466101 (1984-08-01), Schoen

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