Low frequency azimuthal stability of the ionization region of the Hall thruster discharge. II. Global analysis

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dc.contributor.author Escobar, Diego
dc.contributor.author Ahedo Galilea, Eduardo Antonio
dc.date.accessioned 2019-08-30T12:16:16Z
dc.date.available 2019-08-30T12:16:16Z
dc.date.issued 2015-10-21
dc.identifier.bibliographicCitation Physics of plasmas, 22, 102114, 10 pp.
dc.identifier.issn 1070-664X
dc.identifier.issn 1089-7674 (online)
dc.identifier.uri http://hdl.handle.net/10016/28746
dc.description.abstract The linear stability of the Hall thruster discharge is analysed against axial-azimuthal perturbations in the low frequency range using a time-dependent 2D code of the discharge. This azimuthal stability analysis is spatially global, as opposed to the more common local stability analyses, already afforded previously (D. Escobar and E. Ahedo, Phys. Plasmas 21(4), 043505 (2014)). The study covers both axial and axial-azimuthal oscillations, known as breathing mode and spoke, respectively. The influence on the spoke instability of different operation parameters such as discharge voltage, mass flow, and thruster size is assessed by means of different parametric variations and compared against experimental results. Additionally, simplified models are used to unveil and characterize the mechanisms driving the spoke. The results indicate that the spoke is linked to azimuthal oscillations of the ionization process and to the Bohm condition in the transition to the anode sheath. Finally, results obtained from local and global stability analyses are compared in order to explain the discrepancies between both methods
dc.description.sponsorship Support to D. Escobar has been provided by the Air Force Office of Scientific Research, Air Force Material Command, USAF, under Grant No. FA8655-13-1-3033. Support to E. Ahedo has come from Spain’s R&D National Plan (Project ESP-2013-41052).
dc.format.extent 10
dc.language.iso eng
dc.publisher AIP Publishing LLC
dc.relation.ispartof http://hdl.handle.net/10016/28070
dc.rights © 2015 AIP Publishing LLC
dc.subject.other Ionisation
dc.subject.other Plasma Accelerators
dc.subject.other Plasma Instability
dc.subject.other Plasma Magnetohydrodynamics
dc.subject.other Plasma Oscillations
dc.subject.other Plasma Sheaths
dc.title Low frequency azimuthal stability of the ionization region of the Hall thruster discharge. II. Global analysis
dc.type article
dc.subject.eciencia Física
dc.identifier.doi https://doi.org/10.1063/1.4934352
dc.rights.accessRights openAccess
dc.relation.projectID Gobierno de España. ESP-2013-41052
dc.type.version publishedVersion
dc.identifier.publicationfirstpage 1
dc.identifier.publicationissue 10 (102114)
dc.identifier.publicationlastpage 10
dc.identifier.publicationtitle PHYSICS OF PLASMAS
dc.identifier.publicationvolume 22
dc.identifier.uxxi AR/0000017445
dc.contributor.funder Ministerio de Economía y Competitividad (España)
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