Cesiated porous molybdenum converter for intense negative ion sources
- 1 January 1984
- journal article
- Published by AIP Publishing in Review of Scientific Instruments
- Vol. 55 (1) , 8-11
- https://doi.org/10.1063/1.1137596
Abstract
Maintaining the proper low work function surface in steady-state high-current-density negative ion sources is difficult, due to intense ion bombardment of the surface. Experiments were performed in which liquid cesium was forced through a porous molybdenum converter in order to obtain a low work function, while at the same time allowing the surface to be cooled. In a small steady-state hollow cathode discharge source, the H− yield from a porous molybdenum converter was five fold higher than from a solid molybdenum converter which relied on the conventional method of cesium coverage by vapor deposition.Keywords
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