CPC H01J 37/073 (2013.01) [H01J 9/025 (2013.01); H01J 2237/06341 (2013.01)] | 26 Claims |
1. An electron source, comprising:
an insulating base;
a pair of conductive terminals exposed from a first surface of the insulating base;
an insulating support member extending from the first surface of the insulating base;
a drift isolation member disposed at an end of the insulating support member remote from the insulating base;
an emitter-cathode coupled to the drift isolation member; and
one or more heating elements coupled to the conductive terminals and the drift isolation member.
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