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Barium oxide depletion from hollow cathode insert, modelling and comparison with experiments

Barium oxide depletion from hollow cathode insert, modelling and comparison with experiments
Barium oxide depletion from hollow cathode insert, modelling and comparison with experiments
In this paper, the results of a barium oxide depletion model are compared with some experimental results. The
model is used to simulate the T5 and T6 cathodes and the NSTAR discharge cathode. A comparison with the experimental data is performed. For the T5 and T6 cathodes, good qualitative agreement is found, but for theNSTAR cathode, the agreement is not as good. In both cases, the agreement is improved when the boundary conditions are modified to better reflect the experimental conditions. The model presented is the first three-dimensional axisymmetric insert model that includes the dependency of BaO depletion from both the impregnant chemistry and the diffusive motion inside the insert.
0748-4658
364-369
Coletti, Michele
f99567c2-8fab-42dd-9e25-c3f69495667f
Gabriel, Stephen B.
ac76976d-74fd-40a0-808d-c9f68a38f259
Coletti, Michele
f99567c2-8fab-42dd-9e25-c3f69495667f
Gabriel, Stephen B.
ac76976d-74fd-40a0-808d-c9f68a38f259

Coletti, Michele and Gabriel, Stephen B. (2010) Barium oxide depletion from hollow cathode insert, modelling and comparison with experiments. Journal of Propulsion and Power, 26 (2), 364-369. (doi:10.2514/1.41345).

Record type: Article

Abstract

In this paper, the results of a barium oxide depletion model are compared with some experimental results. The
model is used to simulate the T5 and T6 cathodes and the NSTAR discharge cathode. A comparison with the experimental data is performed. For the T5 and T6 cathodes, good qualitative agreement is found, but for theNSTAR cathode, the agreement is not as good. In both cases, the agreement is improved when the boundary conditions are modified to better reflect the experimental conditions. The model presented is the first three-dimensional axisymmetric insert model that includes the dependency of BaO depletion from both the impregnant chemistry and the diffusive motion inside the insert.

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More information

Published date: March 2010
Organisations: Astronautics Group

Identifiers

Local EPrints ID: 156413
URI: http://eprints.soton.ac.uk/id/eprint/156413
ISSN: 0748-4658
PURE UUID: 2bfefa29-299d-493d-8a18-e0339ec18a18

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Date deposited: 02 Jun 2010 12:03
Last modified: 14 Mar 2024 01:43

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Contributors

Author: Michele Coletti
Author: Stephen B. Gabriel

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