Field emission from carbon fibres
- 11 June 1973
- journal article
- Published by IOP Publishing in Journal of Physics D: Applied Physics
- Vol. 6 (9), 1105-1114
- https://doi.org/10.1088/0022-3727/6/9/315
Abstract
The development is described of a carbon-fibre field-emission source with a brightness of 1012 A sr−1 m−2 and currents in excess of 200 μA sr−1 at voltages of 2-3 kV. The source can be run continuously in ambient gas pressures two decades higher than tungsten field emitters at the same current fluctuation level of 2-3%. The source makes possible the operation of field-emission electron guns in conventional unbaked vacuum systems.Keywords
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