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 TVT, 2006, Volume 44, Issue 2, Pages 174–179 (Mi tvt1302)

Plasma Investigations

The effect of axisymmetric two-dimensional magnetic field on the configuration of vacuum-arc plasma

E. F. Prozorov, K. N. Ulyanov, V. A. Fedorov

Russian Electrotechnical Institute Named after V. I. Lenin

Abstract: An experimental investigation is made of the effect of axisymmetric two-dimensional magnetic field on the forming of plasma and on the configuration of cathode spots in a vacuum-arc discharge. It is demonstrated that a magnetic field with a transverse (relative to the discharge axis) component has a significant effect on the shape of plasma column and on the rate of expansion of the cathode spot region. In a magnetic field, arc plasma has the form of truncated cone expanding toward the anode. The cathode spots take up a part of the cathode area which decreases with increasing magnetic field. Arguments are given in support of the assumption that the arrangement of cathode spots and the form of arc plasma are defined by the minimum principle similar to the Steinbeck principle. In so doing, the displacement of spots is caused by their emergence in a new region corresponding to a lower arc voltage. Also discussed is the mechanism associated with retrograde motion of cathode spot in view of the effect of azimuthal magnetic field on the axial component of current and of the effect of axial magnetic field on the azimuthal component of current.

Full text: PDF file (1513 kB)

English version:
High Temperature, 2006, 44:2, 166–171

UDC: 537.52
PACS: 52.25.Hz, 52.80.Vp

Citation: E. F. Prozorov, K. N. Ulyanov, V. A. Fedorov, “The effect of axisymmetric two-dimensional magnetic field on the configuration of vacuum-arc plasma”, TVT, 44:2 (2006), 174–179; High Temperature, 44:2 (2006), 166–171

Citation in format AMSBIB
\Bibitem{ProUlyFed06} \by E.~F.~Prozorov, K.~N.~Ulyanov, V.~A.~Fedorov \paper The effect of axisymmetric two-dimensional magnetic field on the configuration of vacuum-arc plasma \jour TVT \yr 2006 \vol 44 \issue 2 \pages 174--179 \mathnet{http://mi.mathnet.ru/tvt1302} \elib{http://elibrary.ru/item.asp?id=9187068} \transl \jour High Temperature \yr 2006 \vol 44 \issue 2 \pages 166--171 \crossref{https://doi.org/10.1007/s10740-006-0020-4} \elib{http://elibrary.ru/item.asp?id=13517013} \scopus{http://www.scopus.com/record/display.url?origin=inward&eid=2-s2.0-33646734866}