NDLI: Influence of an axial magnetic field on the electron temperature in a vacuum arc plasma

Content Provider	IEEE Xplore Digital Library
Author	Galonska, M. Hollinger, R. Krinberg, I.A. Spaedtke, P.
Copyright Year	2004
Description	Author affiliation: GSI, Gesellschaft fur Schwerionenforschung mbH, Planckstr. 1, 64291 Darmstadt, Germany (Galonska, M.; Hollinger, R.; Spaedtke, P.) \|\| lrkutsk State University, 20 Gagarin Blvd., Irkutsk, 664003 Russia (Krinberg, I.A.)
Abstract	The influence of an axial magnetic field on the electron temperature of a vacuum arc plasma has been studied experimentally and theoretically for moderate discharge currents of 400-600 A, magnetic flux densities of 0-50 mT, and different cathode materials such as uranium, titanium, and carbon. Experiments have been performed using the vacuum arc ion source VARIS. An 127° electrostatic cylinder spectrometer has been used to detect the electron energy spectra. The electron temperature has been derived by a Maxwellian approach applied to the experimental data demonstrating a significant temperature and mean energy rise with increasing magnetic flux density consistently with the model calculations. The electron temperature in the inter-electrode gap of a vacuum arc has been calculated from an energy balance equation that was supplemented by an equation for the cross-section of the plasma flow. The plasma flow is constricted by an external axial magnetic field instead of the free spherical plasma flow in its absence. This leads to an increase in the electron temperature. The constriction of the plasma jet is limited by the cathode group spot diameter at a flux density $B_{max}$ specifying an upper limit of the electron temperature.
Starting Page	209
Ending Page	212
File Size	250533
Page Count	4
File Format	PDF
ISBN	078038461X
ISSN	10932941
DOI	10.1109/DEIV.2004.1418642
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-09-27
Publisher Place	Crimea
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Plasma temperature Magnetic fields Electrons Vacuum arcs Plasma density Cathodes Spectroscopy Anodes Plasma measurements Electrodes
Content Type	Text
Resource Type	Article
Subject	Computer Networks and Communications Software

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