Anisotropy of thermionic electron emission values for LaB6 single-crystal emitter cathodes
Open Access
- 1 October 1976
- journal article
- Published by AIP Publishing in Applied Physics Letters
- Vol. 29 (7), 400-401
- https://doi.org/10.1063/1.89119
Abstract
Measurement of thermionic electron emission values for pointed LaB6 single‐crystal emitter cathodes has shown that 〈110〉 axial orientations yield emission values ten times higher than 〈100〉 orientations at 1545 °K. Minimum values were obtained for the 〈510〉 directions. These findings seem encouraging in achieving perhaps two orders of magnitude higher emission fluxes as compared to tungsten emitters.Keywords
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