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On Electron Concentration Distribution along the Radius of the Positive Column of a Glow Discharge in Electronegative Gases
Author(s) -
Arutunyan G. G.,
Galechyan G. A.,
Tavakalyan L. B.
Publication year - 1983
Publication title -
beiträge aus der plasmaphysik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.531
H-Index - 47
eISSN - 1521-3986
pISSN - 0005-8025
DOI - 10.1002/ctpp.19830230307
Subject(s) - radius , ion , chemistry , electron density , laminar flow , plasma , electron , atomic physics , plane (geometry) , oxygen , analytical chemistry (journal) , thermodynamics , chromatography , physics , geometry , computer security , organic chemistry , mathematics , quantum mechanics , computer science
It is shown in this paper that the form of the electron concentration distribution along the radius of the positive column in an oxygen discharge depends on the relative concentration of negative ions α = n ‐ / n e in the plasma. It is found that in discharges in electronegative gases everywhere along the radius of the positive column, where α > 10, the electron concentration is equal to its value on the tube axis (plane electron distribution along the radius of the positive column). It is shown that an increase of the discharge current leads to the decrease of α and to the change of the distribution of profile n e from plane to parabolic. However, weak laminar oxygen pumping along the positive column leads to more plane an electron concentration distribution because an increase of the negative ions concentration takes place. It is induced by the decrease of oxygen atoms density on account of their carrying out by the flow.