Beam generating system for electron tubes, particularly travelli

Details Beam generating system for electron tubes, particularly travelli Beam generating system for electron tubes, particularly travelli

1984-11-02

1987-02-17

Moore, David K.

Electric lamp and discharge devices

With support and/or spacing structure for electrode and/or...

For indirectly heated cathode

313346DC, 313441, 313446, 313456, 315 35, H01J 114

Patent

active

046442197

ABSTRACT:
A beam generating system for electron tubes, particularly travelling wave tubes, is formed of a beam shaping electrode and a dispenser cathode supported therein having an emission disk at its end face. A positional change of the dispenser cathode in the beam shaping electrode at different ambient temperatures is suppressed with the beam generating system, and thus a beam defocussing is avoided. According to the invention, the dispenser cathode is directly connected to the beam shaping electron and is connected below the emission disk by means of a radial cathode support. The beam generating system of this type is particularly employed in travelling wave tubes.

REFERENCES:
patent: 2146365 (1939-02-01), Batchelor
patent: 2153223 (1939-04-01), Young
patent: 2362908 (1944-11-01), Liebmann
patent: 3134042 (1964-05-01), Sato et al.
patent: 3385997 (1968-05-01), Vitzthum
patent: 3681641 (1972-08-01), Katz
patent: 3979634 (1976-09-01), Jaillet et al.
patent: 4298818 (1981-11-01), McCandless
patent: 4403169 (1983-09-01), Blanken

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