Axially compact field emission cathode assembly

Details Axially compact field emission cathode assembly Axially compact field emission cathode assembly

1986-08-11

1988-04-26

Anderson, Bruce C.

Radiant energy

Ion generation

Field ionization type

250423R, 313310, 313336, H01J 3726

Patent

active

047407050

ABSTRACT:
An axially compact field emission cathode assembly for use in an electron beam device comprises a field emission tip, an electriclly conductive filament for mechanically supporting said tip and for receiving and conducting to said tip a predetermined electrical potential for exciting said filament to cause electron emission from said tip. Filament support means supports the filament with the tip positioned on an electron beam axis within said device. The cathode assembly is characterized by the filament being supported by said filament support means to extend transversely to the electron beam axis, whereby to reduce the axial length of the device.

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patent: 4482839 (1984-11-01), Wada et al.
Electron Gun Using a Field Emission Source, A. V. Crewe, Rev. of Science Instru., vol. 39, No. 4, pp. 576-583, Apr. 1968.

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