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Numerical simulation of the insert chemistry of the hollow cathode from the deep space 1 ion engine 30,000 Hrs life test

Numerical simulation of the insert chemistry of the hollow cathode from the deep space 1 ion engine 30,000 Hrs life test
Numerical simulation of the insert chemistry of the hollow cathode from the deep space 1 ion engine 30,000 Hrs life test
A model for the insert chemistry developed by the authors and based on the knowledge of the BaO – CaO – Al2O3 ternary system the ELT discharge cathode insert from the Deep Space 1 life test has been simulated. The computed data show a good agreement with the experimental one; the agreement increase with the imposition of boundary conditions closer to the experimental evidence. Tungsten deposition effect have been introduced into the model using experimental data and further improving the agreement between computed and measured data. The deposition trend found suggests the possibility of a link between barium depletion and tungsten deposition.
hollow cathode, insert chemistry, nstar
Coletti, Michele
f99567c2-8fab-42dd-9e25-c3f69495667f
Grubisic, Angelo
94e5f6ea-9b65-4c81-bfa1-f0e29e8bbaf4
Gabriel, Stephen
ac76976d-74fd-40a0-808d-c9f68a38f259
Coletti, Michele
f99567c2-8fab-42dd-9e25-c3f69495667f
Grubisic, Angelo
94e5f6ea-9b65-4c81-bfa1-f0e29e8bbaf4
Gabriel, Stephen
ac76976d-74fd-40a0-808d-c9f68a38f259

Coletti, Michele, Grubisic, Angelo and Gabriel, Stephen (2007) Numerical simulation of the insert chemistry of the hollow cathode from the deep space 1 ion engine 30,000 Hrs life test. 30th International Electric Propulsion Conference (IEPC 2007), Italy. 17 - 20 Sep 2007.

Record type: Conference or Workshop Item (Paper)

Abstract

A model for the insert chemistry developed by the authors and based on the knowledge of the BaO – CaO – Al2O3 ternary system the ELT discharge cathode insert from the Deep Space 1 life test has been simulated. The computed data show a good agreement with the experimental one; the agreement increase with the imposition of boundary conditions closer to the experimental evidence. Tungsten deposition effect have been introduced into the model using experimental data and further improving the agreement between computed and measured data. The deposition trend found suggests the possibility of a link between barium depletion and tungsten deposition.

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More information

Published date: September 2007
Venue - Dates: 30th International Electric Propulsion Conference (IEPC 2007), Italy, 2007-09-17 - 2007-09-20
Keywords: hollow cathode, insert chemistry, nstar
Organisations: Astronautics Group

Identifiers

Local EPrints ID: 48610
URI: https://eprints.soton.ac.uk/id/eprint/48610
PURE UUID: 31364c56-7524-46db-9831-fee90e1adc8d

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Date deposited: 04 Oct 2007
Last modified: 13 Mar 2019 20:56

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Contributors

Author: Michele Coletti
Author: Angelo Grubisic
Author: Stephen Gabriel

University divisions

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