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Equilibrium model for two low-pressure electronegative plasmas connected by a double layer

Chabert, P.; Plihon, N.; Corr, C. S.; Raimbault, J.-L.; Lichtenberg, A. J.

Description

Plihon et al. [J. Appl. Phys.98, 023306 (2005)] have recently shown that double layers usually form during the expansion of a low pressure electronegative plasma. These double layers act as permeable internal boundaries between the source (upstream) plasma and the downstream expanding plasma; positive ions flow from upstream to downstream whereas negative ions flow in the opposite direction. So far, the detailed physical mechanisms leading to their formation have not been identified. In this...[Show more]

dc.contributor.authorChabert, P.
dc.contributor.authorPlihon, N.
dc.contributor.authorCorr, C. S.
dc.contributor.authorRaimbault, J.-L.
dc.contributor.authorLichtenberg, A. J.
dc.date.accessioned2015-11-06T02:57:06Z
dc.date.available2015-11-06T02:57:06Z
dc.identifier.issn1070-664X
dc.identifier.urihttp://hdl.handle.net/1885/16384
dc.description.abstractPlihon et al. [J. Appl. Phys.98, 023306 (2005)] have recently shown that double layers usually form during the expansion of a low pressure electronegative plasma. These double layers act as permeable internal boundaries between the source (upstream) plasma and the downstream expanding plasma; positive ions flow from upstream to downstream whereas negative ions flow in the opposite direction. So far, the detailed physical mechanisms leading to their formation have not been identified. In this paper, we develop a model for the two plasma equilibria, upstream and downstream, assuming that the double layer exists and couples the two plasmas. At very low pressure, typically 0.5mTorr, the coupling is strong and acts both ways. The negative ions created downstream contributes to the upstream equilibrium as well as the upstream positive ions contribute to the downstream equilibrium. As the pressure increases, the situation becomes asymmetric. The sourceplasma is not affected by the negative ions flowing from downstream, whereas the positive ions coming from the source control the downstream plasma equilibrium, where local ionization is negligible.
dc.description.sponsorshipThis work has been supported by the European Space Agency, under Ariadna Study Contract No. ACT-04-3101. One of the authors A.J.L. acknowledges the hospitality of the LPTP, where the collaboration was begun.
dc.publisherAmerican Institute of Physics (AIP)
dc.rightshttp://www.sherpa.ac.uk/romeo/issn/1070-664X..."Publishers version/PDF may be used on author's personal website, institutional website or institutional repository" from SHERPA/RoMEO site (as at 6/11/15). Copyright 2006 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics. The following article appeared in Physics of Plasmas and may be found at https://doi.org/10.1063/1.2345353
dc.sourcePhysics of Plasmas
dc.subjectKeywords: Electronegative plasmas; Permeable internal boundaries; Plasma equilibria; Atomic physics; High energy physics; Ionization; Positive ions; Pressure effects; Plasmas
dc.titleEquilibrium model for two low-pressure electronegative plasmas connected by a double layer
dc.typeJournal article
local.description.notesImported from ARIES
local.identifier.citationvolume13
dc.date.issued2006-09-21
local.identifier.absfor020204
local.identifier.ariespublicationu4048219xPUB31
local.publisher.urlhttps://www.aip.org/
local.type.statusPublished Version
local.contributor.affiliationChabert, Pascal, Ecole Polytechnique, France
local.contributor.affiliationPlihon, N, CNRS, France
local.contributor.affiliationCorr, Cormac, College of Physical and Mathematical Sciences, CPMS Research School of Physics and Engineering, Plasma Research Laboratory, The Australian National University
local.contributor.affiliationRaimbault, JL, Ecole Polytechnique, France
local.contributor.affiliationLichtenberg, AJ, Ecole Polytechnique, France
local.bibliographicCitation.issue9
local.bibliographicCitation.startpage093504
local.identifier.doi10.1063/1.2345353
dc.date.updated2015-12-08T03:25:47Z
local.identifier.scopusID2-s2.0-33749365367
CollectionsANU Research Publications

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