Thermionic cathode with continuous bimetallic wall
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United States of America Patent
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Mar 17, 1998
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N/A
app pub date -
Jan 8, 1993
filing date -
Jan 8, 1993
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Abstract
A cathode sheath for a thermionic electron-gun cathode. The sheath is substantially in the form of a hollow cylinder and has an outer surface and an inner surface, a central axis, a closed end and an axially-opposite open end, and a side wall extending between the closed end and the open end. The sheath is a continuous bimetallic laminate having a first layer of material forming the inner surface and a second layer of electron-emissive material overlying substantially the entirety of the first layer and forming the outer surface. The laminate has a preselected thickness at the closed end and has a thickness at the side wall which varies along the central axis.
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