One-dimensional model for hollow cathode orifice lifetime prediction
One-dimensional model for hollow cathode orifice lifetime prediction
Lifetime assessment of hollow cathode (HC) sources is an experimentally demanding process, due to the large amount of hours space qualification requires. In this Paper, we present a one-dimensional orifice model coupled to a global-averaged insert model, developed for lifetime prediction of a HC neutralizer in terms of orifice erosion; a modified sputtering yield curve is derived, similar to a previous literature work, and the role of anomalous resistivity is discussed in view of the erosion profile. Variations on the active length parameter, required for the insert modeling, are seen to affect the orifice plasma profiles and the erosion to a lesser degree, and the time evolution of the orifice channel confirms the expected asymptotic decrease of the erosion rate.
509-516
Bosi, Franco
d35c0d4b-3472-4961-922a-a9951d6ab96a
Guarducci, Francesco
4cdc9bc9-68e4-4b49-8e72-63e7f75819aa
Gabriel, Stephen
ac76976d-74fd-40a0-808d-c9f68a38f259
31 July 2021
Bosi, Franco
d35c0d4b-3472-4961-922a-a9951d6ab96a
Guarducci, Francesco
4cdc9bc9-68e4-4b49-8e72-63e7f75819aa
Gabriel, Stephen
ac76976d-74fd-40a0-808d-c9f68a38f259
Bosi, Franco, Guarducci, Francesco and Gabriel, Stephen
(2021)
One-dimensional model for hollow cathode orifice lifetime prediction.
Journal of Propulsion and Power, 37 (4), .
(doi:10.2514/1.B38094).
Abstract
Lifetime assessment of hollow cathode (HC) sources is an experimentally demanding process, due to the large amount of hours space qualification requires. In this Paper, we present a one-dimensional orifice model coupled to a global-averaged insert model, developed for lifetime prediction of a HC neutralizer in terms of orifice erosion; a modified sputtering yield curve is derived, similar to a previous literature work, and the role of anomalous resistivity is discussed in view of the erosion profile. Variations on the active length parameter, required for the insert modeling, are seen to affect the orifice plasma profiles and the erosion to a lesser degree, and the time evolution of the orifice channel confirms the expected asymptotic decrease of the erosion rate.
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Accepted/In Press date: 24 December 2020
e-pub ahead of print date: 29 January 2021
Published date: 31 July 2021
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Local EPrints ID: 491841
URI: http://eprints.soton.ac.uk/id/eprint/491841
ISSN: 0748-4658
PURE UUID: f27a4155-524d-411c-9a9c-fafe136bdd9c
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Date deposited: 04 Jul 2024 16:59
Last modified: 10 Jul 2024 20:14
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Author:
Franco Bosi
Author:
Francesco Guarducci
Author:
Stephen Gabriel
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