MAGNETIC CONSTRICTION EFFECTS IN HIGH-CURRENT VACUUM ARCS PRIOR TO THE RELEASE OF ANODE VAPOR.

Raymond L. Boxman*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

A model is developed describing the interelectrode plasma generated by a multi-cathode-spot cathode as a conducting fluid flowing from the cathode to the anode. The model is analyzed numerically for a sample physical situation consisting of a 3-kA Cu vapor arc between 25-mm-diam electrodes separated by 9 mm, in which case the mass density and fluid velocity are found to be 5 multiplied by 10** minus **5 kg/m**3 and 7 multiplied by 10**3 m/s, respectively. The fluid flow is analyzed and a constriction caused by the magnetic pinch force is found to develop near the anode. A constriction in the current flow is also calculated, caused primarily by the Hall current.

Original languageEnglish
Pages (from-to)2339-2344
Number of pages6
JournalJournal of Applied Physics
Volume48
Issue number6
StatePublished - 1977

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