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On the mechanism of the external magnetic field action on the electron temperature and ion charge state distribution in a vacuum arc plasma

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Abstract

When an external axial magnetic field is applied to a vacuum arc, the radial expansion of plasma from cathode spots transforms into a plasma flow along the magnetic field, provided that the electron-ion collision frequency is smaller than the Larmor frequency. As the magnetic field strength increases, the diameter of the resulting cylindrical channel decreases. This leads to an increase in the electron temperature and the ion charge due to enhanced Joule heating of the plasma. Unlike the intrinsic azimuthal magnetic field, the external axial field only restricts expansion of the plasma, rather than compressing the plasma jet.

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Authors and Affiliations

  1. Irkutsk State University, Irkutsk, Russia

    I. A. Krinberg

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  1. I. A. Krinberg
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Translated from Pis’ma v Zhurnal Tekhnichesko\(\overset{\lower0.5em\hbox{$\smash{\scriptscriptstyle\smile}$}}{l} \) Fiziki, Vol. 29, No. 12, 2003, pp. 42–48.

Original Russian Text Copyright © 2003 by Krinberg.

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Krinberg, I.A. On the mechanism of the external magnetic field action on the electron temperature and ion charge state distribution in a vacuum arc plasma. Tech. Phys. Lett. 29, 504–506 (2003). https://doi.org/10.1134/1.1589572

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  • DOI: https://doi.org/10.1134/1.1589572

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