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Some dynamical properties of very strong double layers in a triple plasma device

Published online by Cambridge University Press:  09 March 2009

T. Carpenter  and
S. Torvén
T. Carpenter
Affiliation:
Department of Physics, University of Iowa, Iowa City, Iowa 52242, U.S.A.
S. Torvén
Affiliation:
Department of Plasma Physics, Royal Inst. of Technology, S-10044, Stockholm, Sweden
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Abstract

We present experimental results on three dynamic properties of very strong double layers observed in a triple plasma device. First, it is observed that when an inductance of sufficient size is inserted in series with the external bias supply used to produce the double layer, disruptions in the plasma current occur accompanied by disruptions in the double layer potential. Second, it is observed that with all external reactances reduced as much as possible, a sort of jitter-motion occurs in the position of the double layer around its equilibrium position. Third, when the external bias supply is pulsed, the initial potential distribution is observed to have an essentially uniform slope, as in the case of a vacuum capacitor. The disruption phenomenon may be explained in terms of the behavior of the potential structure as a function of the bias voltage and this explanation is discussed along with the experimental evidence for its validity. A comparable understanding of the other two phenomena has not been achieved, but in both cases there are qualitative differences between the behavior reported here and what has been observed in Q-machines and these differences are discussed.

Type
Research Article
Information
Laser and Particle Beams , Volume 5 , Issue 2 , May 1987 , pp. 325 - 337
Copyright
Copyright © Cambridge University Press 1987

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References

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