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A model for low work function compound deposition on hollow cathode insert surface

Coletti, Michele and Gabriel, Stephen B. (2007) A model for low work function compound deposition on hollow cathode insert surface In Proceedings of the 46th AIAA Aerospace Sciences Meeting and Exhibit. American Institute of Aeronautics and Astronautics. 15 pp, pp. 1-15.

Record type: Conference or Workshop Item (Paper)


The chemistry of the low work function compounds on tungsten emitter surface has been presented qualitatively giving a possible explanation of the 4:1:1 ratio commonly used. The processes involved in BaO deposition and desorption have been described and quantified as well as possible given the chemical data present in the literature producing a simple model for deposition and desorption. The model has then been tested with the ELT NSTAR cathode. The results obtained from the model have been found to be very conservative as expected and a possible explanation has been given stressing the need of a coupled deposition-desorption-plasma model.

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Published date: 24 December 2007
Venue - Dates: 46th AIAA Aerospace Sciences Meeting and Exhibit, 2008-01-07 - 2008-01-10
Organisations: Astronautics Group


Local EPrints ID: 52081
PURE UUID: 532fdbc8-0f55-4f1b-b766-ca3d22a38526

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Date deposited: 19 Jun 2008
Last modified: 17 Jul 2017 14:45

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Author: Michele Coletti
Author: Stephen B. Gabriel

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