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Hollow cathode life time model

Record type: Article

In this paper the latest advances in the hollow cathode lifetime modeling carried out at the University of Southampton will be presented. A barium oxide insert depletion model and a surface low work function compounds deposition/depletion model have been already developed by the authors. Here a procedure to update the plasma parameters relatively to changes of the hollow cathode surface work function and an end-of-life criterion will be presented. The procedure has been validated with experimental results and then coupled with the deposition/desorption model already developed by the authors. The evolution of the surface of the cathode tested for 28,000 hours by Sarver-Verhey has been simulated and from the data obtained an end of life criterion has been developed. Then using this criterion the ELT NSTAR discharge cathode has been simulated under the throttling conditions used during the Deep Space 1 Spare Ion Engine. The lifetimes found are in agreement with the theoretical expectation.

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Citation

Coletti, Michele and Gabriel, Stephen B. (2009) Hollow cathode life time model Journal of Plasma and Fusion Research Series, 8, pp. 1595-1601.

More information

Published date: 30 September 2009
Additional Information: Proceedings of the 14th International Congress on Plasma Physics (ICPP2008), September 8-12, 2008, Fukuoka, Japan
Keywords: hollow cathode, lifetime, barium depletion
Organisations: Astronautics Group

Identifiers

Local EPrints ID: 156411
URI: http://eprints.soton.ac.uk/id/eprint/156411
ISSN: 1883-9630
PURE UUID: a289f3ac-f2cc-48f8-bc56-7a9c48a556fb

Catalogue record

Date deposited: 02 Jun 2010 10:49
Last modified: 18 Jul 2017 12:42

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Contributors

Author: Michele Coletti
Author: Stephen B. Gabriel

University divisions


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