Electron collector having means for trapping secondary electrons

Details Electron collector having means for trapping secondary electrons Electron collector having means for trapping secondary electrons

1974-04-26

1976-02-03

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 538, H01J 2534

Patent

active

039366952

ABSTRACT:
The collector wall axially coextensive with the expanding beam of electrons includes at least portions thereof which extend inwardly to closely approach the periphery of the beam of electrons at several axially spaced planes. In its simplest form this structure consists of a series of annular baffle plates each having a central aperture of a diameter only slightly larger than the diameter of the beam at the axial plane in the collector where the baffle plate is located. These baffle plates have been found to substantially reduce the number of secondary (impact-produced) electrons which return from the collector to the interaction sections of the linear beam microwave tube. As a result spurious signals and noise caused by back-streaming secondary electrons are significantly reduced.

REFERENCES:
patent: 3585429 (1971-06-01), O'Loughlin et al.
patent: 3644778 (1972-02-01), Mihran et al.
patent: 3702951 (1972-11-01), Kosmahl
patent: 3717787 (1973-02-01), Doyle
patent: 3806755 (1974-04-01), Lien et al.
"The Tilted Electric Field Soft-Landing Collector and its Application to a TWT," by Matsuki et al., IEEE Transactions on Electron Devices, Vol. ED-19, No. 1, January 1972.

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