Particle modeling of radial electron dynamics in a controlled discharge of a Hall thruster

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Show simple item record Domínguez Vázquez, Adrián Ahedo Galilea, Eduardo Antonio Taccogna, F 2019-09-04T08:58:30Z 2019-09-04T08:58:30Z 2018-06-01
dc.identifier.bibliographicCitation Domínguez-Vázquez, A., Taccogna, F. y Ahedo, E. (2018). Particle modeling of radial electron dynamics in a controlled discharge of a Hall thruster. Plasma Sources Science and Technology, 27(6).064006
dc.identifier.issn 0963-0252
dc.description Special issue on plasma-surface Interactions
dc.description.abstract An improved radial particle-in-cell model of an annular Hall effect thruster discharge with secondary-electron emission from the walls and a radial magnetic field is presented. New algorithms are implemented: first, to adjust the mean neutral density to the desired mean plasma density; second, to avoid the refreshing of axially accelerated particles; and third, to correctly weigh low-density populations (such as secondary electrons). The high-energy tails of the velocity distribution functions of primary and secondary electrons from each wall are largely depleted, leading to temperature anisotropies for each species. The secondary-electron populations are found to be partially recollected by the walls and partially transferred to the primary population. The replenishment ratio of the primary high-energy tail is determined based on the sheath potential fall. Significant asymmetries at the inner and outer walls are found for the collected currents, the mean impact energy, and the wall and sheath potentials. Radial profiles in the plasma bulk are asymmetric too, due to a combination of the geometric expansion, the magnetic mirror effect, and the centrifugal force (emanating from the E x B drift). The temperature anisotropy and non-uniformity, and the centrifugal force modify the classical Boltzmann relation on electrons along the magnetic lines.
dc.description.sponsorship The work at UC3M was supported by the CHEOPS project, funded by the European Union’s Horizon 2020 Research and Innovation Programme, under Grant Agreement 730135. Additional support came from Spain’s National Research and Development Plan (Project ESP2016-75887). F T was sup-ported by the Apulia Space Project (grant PON03PE_00067_6).
dc.format.extent 15
dc.language.iso eng
dc.publisher IOP Publishing
dc.rights © 2018 IOP Publishing Ltd.
dc.subject.other Hall thruster
dc.subject.other Particle-in-cell
dc.subject.other Secondary-electron emission
dc.title Particle modeling of radial electron dynamics in a controlled discharge of a Hall thruster
dc.type article
dc.subject.eciencia Aeronáutica
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. ESP2016-75887-P
dc.relation.projectID info:eu-repo/grantAgreement/EC/H2020/730135
dc.type.version acceptedVersion
dc.identifier.publicationissue 6
dc.identifier.publicationtitle Plasma Sources Science and Technology
dc.identifier.publicationvolume 27
dc.identifier.uxxi AR/0000021676
dc.contributor.funder European Commission
dc.contributor.funder Ministerio de Economía y Competitividad (España)
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