Ion and electron beam steering and focussing system

Details Ion and electron beam steering and focussing system Ion and electron beam steering and focussing system

1983-07-19

1987-06-09

Scott, Jr., Leon

Coherent light generators

Free electron laser

372101, 372 37, 315 3, 315 4, 315 541, 328233, H01S 300

Patent

active

046726152

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 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
J. C. Kelly; "Axially Symmetric Electrostatic and Magnetic Fields for Ion Beam Focusing"; IEEE Trans. on Nuc. Sci., V. NS-30, No. 2, Apr. 1983, pp. 1476-1479.
"A New Magnetic Coaxial Lens System for Hollow Ion Beams", G. W. Kentwell and J. C. Kelly, 1983, pp. 1-4.
"Facilities in the United States", Ednor M. Rowe, Physics Today, May 1981, pp. 28-37.
"Optical Properties of Cylindrical Lenses", Vsevolozhshaya et al., Sov. Phys. Tech. Phys., vol. 20, No. 12, pp. 1556-1563.
White; Modern College Physics, (Sixth Edition), pp. 408-409, 1972.

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