Multistage depressed collector

Details Multistage depressed collector Multistage depressed collector

1976-10-04

1978-06-20

Chatmon, Jr., Saxfield

Electric lamp and discharge devices: systems

Cathode ray tube circuits

Combined cathode ray tube and circuit element structure

315 35, H01J 2302

Patent

active

040964094

ABSTRACT:
A multistage depressed collector for collecting spent electrons from an electron beam useful as an element of a microwave tube includes an evacuated region having an entrance at one end for receiving electrons, and means for establishing an essentially two-dimensional hyperbolic electrostatic focusing field within the evacuated region defined by equipotential field lines having the geometry of concave curves as viewed from said electron entrance, and a plurality of electrodes located along equipotential lines, and wherein said entrance is located asymmetrically with respect to the electrodes. The foregoing structure includes a final electrode, a plurality of intermediate electrodes, each of the intermediate electrodes having an electron beam passage therethrough, and all of said electrodes having an essentially concave geometry, as viewed from said entrance.

REFERENCES:
patent: 3368104 (1968-02-01), McCullough
patent: 3526805 (1970-09-01), Okoshi et al.
patent: 3644778 (1972-02-01), Mihran et al.
patent: 3702951 (1972-11-01), Kosmahl
patent: 3764850 (1973-10-01), Kosmahl
patent: 3940655 (1976-02-01), Palluel et al.
patent: 3993925 (1976-11-01), Achter et al.

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