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On the Anomaly of the Electrical Field Strength in the Magnetized Positive Column of Glow Discharges at Small Currents
Author(s) -
Deutsch H.,
Klagge S.
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.19830230402
Subject(s) - ambipolar diffusion , atomic physics , metastability , axial symmetry , electron , field strength , glow discharge , chemistry , magnetic field , diffusion , atom (system on chip) , excited state , field (mathematics) , plasma , physics , thermodynamics , nuclear physics , mathematics , quantum mechanics , computer science , pure mathematics , embedded system , organic chemistry
The axial electrical field strength in the positive column of glow discharges at small currents in noble gases passes through a maximum with the increase of an axially directed magnetic field. This maximum is explained of the contrary processes of extension of the radial profiles of the electron energy and the concentration of the metastable atoms on the one hand and the decrease of the ambipolar diffusion losses on the other hand. Using the results of measurements of metastable atom concentrations, the electrical field strength is calculated as a function of magnetical induction with the aid of a set of balance equations. The radial and axial distribution of the electrons is checked by probe measurements. The methods for measuring the concentration of the excited atoms and the electrons are described.