Field emission type electron gun

Details Field emission type electron gun Field emission type electron gun

1984-02-14

1986-06-24

Moore, David K.

Electric lamp and discharge devices

Electrode and shield structures

Filament or resistance heated electrodes

313336, 313337, 315 1, H01J 116, H01J 302, H01J 122, H01J 1910

Patent

active

045969426

ABSTRACT:
A field emission type electron gun comprises a cathode, a plurality of anodes opposing in series to the cathode and a filament for heating the anodes, all being contained in a vacuum tube. The filament is placed immediately before a first anode directly opposing the cathode in a symmetrical manner so as to serve both as a gas expelling member and as an anode.

REFERENCES:
patent: 3775630 (1973-11-01), Minamikawa et al.
patent: 4019077 (1977-04-01), Sakitani
patent: 4396861 (1983-08-01), Hoffmeister et al.

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