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The Effect of External Magnetic Field on a Vacuum Arc

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Abstract

The effect of an external longitudinal magnetic field on the time required for anode spot formation in a high-current (5 to 12 kA) vacuum arc is experimentally studied, and the minimal value of a magnetic field inhibiting the anode spot formation is determined. The experimental results are compared with theory. The phenomenon of break of current in a low-current (100 to 300 A) vacuum discharge upon superposition of a magnetic field with transverse component on the discharge is investigated. The probability of break of current increases with the magnetic field. The possible mechanism of break of current is discussed.

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Authors and Affiliations

  1. All-Russia Electrotechnical Institute, Moscow, 111250, Russia

    E. F. Prozorov, K. N. Ul'yanov & V. A. Fedorov

Authors
  1. E. F. Prozorov
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  2. K. N. Ul'yanov
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  3. V. A. Fedorov
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Prozorov, E.F., Ul'yanov, K.N. & Fedorov, V.A. The Effect of External Magnetic Field on a Vacuum Arc. High Temperature 41, 428–433 (2003). https://doi.org/10.1023/A:1025143211991

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