Linear beam tube with reflected electron trap

Details Linear beam tube with reflected electron trap Linear beam tube with reflected electron trap

1982-09-27

1985-03-19

Chatmon, Saxfield

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 538, 315 4, 315 5, 315 539, H01J 2308

Patent

active

045061904

ABSTRACT:
Some electrons reflected from the collector of a klystron form a beam current flowing back toward the input end of the tube. This beam is modulated and can carry a regenerate signal which distorts the tube's performance when amplifying a television signal. The reflected electrons are removed by a spiralling transverse magnetic field having a pitch equal to the cyclotron wavelength in the axial magnetic field used to focus the beam. The rotative sense of the spiral is such that forward-going beam electrons are not affected but returning electrons are accelerated in their cyclotron orbits until they are driven outside the beam and are collected.

REFERENCES:
patent: 3072817 (1963-01-01), Gordon
patent: 3258706 (1966-06-01), Sturrock
patent: 3302053 (1967-01-01), Udelson
patent: 3398376 (1968-08-01), Hirshfield
patent: 3433992 (1969-03-01), Tancredi et al.
patent: 3463959 (1969-08-01), Jory et al.
patent: 3902098 (1975-08-01), Tanaka et al.
patent: 4392078 (1983-07-01), Noble et al.

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