Influence of the positive ion thermal motion on the stratified presheath in electronegative plasmas

As the Bohm criterion becomes multivalued in electronegative plasmas, when the ionization rate is low, the solution of Poisson's equation consists of an oscillatory electric potential profile before the sheath is formed (stratified presheath). By including the positive ion thermal motion these...

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Bibliographic Details
Published inJournal of physics. D, Applied physics Vol. 37; no. 6; pp. 863 - 867
Main Authors Palop, J I Fernández, Ballesteros, J, Hernández, M A, Crespo, R Morales, Pino, S Borrego del
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 21.03.2004
Institute of Physics
Subjects
Exact sciences and technology
Physics
Oscillations
Electric potential
Poisson equation
Ionization
Positive ions
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Summary:As the Bohm criterion becomes multivalued in electronegative plasmas, when the ionization rate is low, the solution of Poisson's equation consists of an oscillatory electric potential profile before the sheath is formed (stratified presheath). By including the positive ion thermal motion these oscillations may be attenuated. The influence of this thermal motion on the parameter space region in which the stratified presheath takes place in the case of plane geometry is analysed.
Bibliography:ObjectType-Article-2
SourceType-Scholarly Journals-1
ObjectType-Feature-1
content type line 23
ISSN:0022-3727
1361-6463
DOI:10.1088/0022-3727/37/6/010