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Transport and Turbulence Experiments in Three Regimes of a Magnetized Plasma
Author(s) -
Vogels J. M. M. J.,
Schram D. C.
Publication year - 1986
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.19860260502
Subject(s) - turbulence , mechanics , physics , instability , plasma , viscosity , kinetic energy , oscillation (cell signaling) , turbulence modeling , turbulence kinetic energy , k epsilon turbulence model , classical mechanics , thermodynamics , chemistry , biochemistry , quantum mechanics
The occurrence of turbulence and its influence on plasma viscosity have been investigated. A simple model of turbulence has been obtained by the balance of the growth of the combined Rayleigh‐Taylor and Kelvin‐Helmholtz instability with the damping by friction against the neutrals, by kinetic viscosity and by turbulent viscosity itself. In the experiment, a hollow cathode arc, three regimes can be distinguished: a kinetic, a frictional and a turbulent regime. By variations of the discharge parameters around a suitably chosen operating point, transitions between the three regimes are caused. It appears that the longitudinal drift velocity is also influenced by the turbulence. A dispersion relation for the large scale oscillation of the whole arc has been derived and checked experimentally.