Studies on the Mechanism of Operation of the L Cathode. I
- 1 February 1957
- journal article
- conference paper
- Published by AIP Publishing in Journal of Applied Physics
- Vol. 28 (2) , 156-166
- https://doi.org/10.1063/1.1722699
Abstract
Performance characteristics of the L cathode, including emission, evaporation rate, and evaporant composition, are presented, followed by an investigation of the constitution of the emitting surface. Activation of the external tungsten surface is effected by the migration thereover of strongly adsorbed BaO issuing from the pores. The active surface, which is continuously renewed during life, comprises a nearly complete oxygen monolayer on tungsten covered in turn by a complete barium monolayer. The oxygen in the dipole layer enhances emission and drastically increases the sticking time of barium. The cathode emission is close to the maximum that can be expected from a barium activated tungsten dispenser cathode.This publication has 6 references indexed in Scilit:
- D.C. and Pulsed Emission from L-CathodesProceedings of the Physical Society. Section B, 1955
- Adsorption of Strontium and of Barium on TungstenThe Journal of Chemical Physics, 1955
- Physical Processes in the L CathodeJournal of Applied Physics, 1952
- Proceedings of the American Physical SocietyPhysical Review B, 1951
- The Evaporation of Atoms, Ions and Electrons from Caesium Films on TungstenPhysical Review B, 1933
- Phenomena in Oxide Coated FilamentsPhysical Review B, 1929