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On the ion energy distribution of high current arcs in vacuum
Authors:Rusteberg   C. Lindmayer   M. Juttner   B. Pursch   H.
Affiliation:Inst. fur Elektrische Energieanlagen, Tech. Univ. Braunschweig;
Abstract:With the experiments presented in this paper, applications of a retarding field analyzer (RFA) for the measurement of the ion energy E i in a vacuum arc plasma are discussed. The examined plasma was produced by a sinusoidal half-wave vacuum arc current. The experiments were concentrated on evaluating the plasma parameters at the last three milliseconds before current zero. In a current range from 300 Arms to 10 kArms, the ion energy distributions and their peak values were evaluated. With the increase of the arc current, a decrease of the ion energy was found. By additional investigations of the angular distribution of the ion energies, a transition from a collision dominated interelectrode plasma to a freely expanding plasma was observed, depending on the arc current
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