Evolution of the Cathode Spot Distribution in an Axial Magnetic Field Controlled Vacuum Arc at Long Contact Gap

Authors

  • B. Tezenas du Montcel Institut Jean Lamour - UMR 7198 CNRS/Université de Lorraine, Laboratoire d’Excellence DAMAS, CS 50840, 54011 Nancy Cedex SuperGrid Institute SAS, 130 rue Léon Blum, BP1321, 69611 Villeurbanne
  • P. Chapelle Institut Jean Lamour - UMR 7198 CNRS/Université de Lorraine, Laboratoire d’Excellence DAMAS, CS 50840, 54011 Nancy Cedex
  • A. Jardy Institut Jean Lamour - UMR 7198 CNRS/Université de Lorraine, Laboratoire d’Excellence DAMAS, CS 50840, 54011 Nancy Cedex
  • C. Creusot SuperGrid Institute SAS, 130 rue Léon Blum, BP1321, 69611 Villeurbanne

DOI:

https://doi.org/10.14311/ppt.2017.1.99

Keywords:

vacuum arc, axial magnetic field, long gap, cathode spot distribution, experimental study

Abstract

The distribution of cathode spots in a CuCr25 vacuum arc controlled by an axial magnetic field and ignited on the lateral surface of the cathode is investigated for long gap distances, from the processing of high-speed video images. The processing method includes also estimating the current carried by a single spot and reconstructing the distribution of the current density at the cathode. Various distributions depending partly on the arc current are described.

References

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Published

2017-10-15

Issue

Vol. 4 No. 1 (2017)

Section

Articles

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