Thermionic electron source

Details Thermionic electron source Thermionic electron source

1990-03-19

1992-06-02

Yusko, Donald J.

Electric lamp and discharge devices

Electrode and shield structures

Indirectly heated cathodes

313270, 313337, 313346R, 313355, 313345, 219543, 338307, 338308, 338314, H01J 124

Patent

active

051189836

ABSTRACT:
A high temperature low density operating element includes a porous high temperature operating element film formed into a predetermined configuration and disposed on one surface of an insulating member with good heat conductivity, a resistive film with a high melting point and good heat conductivity having a higher density than the high temperature operating element film, formed into a predetermined configuration on a second surface of the insulating member with good heat conductivity, a lead wire connected to the resistive film, an insulating protective film disposed on the insulating member covering the resistive film.

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Schmid et al., "Titanium Impurity . . . Cathodes", Applications of Surface Science 21, pp. 37-49, Dec. 1985.

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