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Dynamics of an argon gas-embedded Z-pinch micro-channel as a function of the initial preionization

Published online by Cambridge University Press:  09 March 2009

T. Auguste
Affiliation:
Laboratoire de Physique des Milieux Ionisés, Laboratoire du CNRS, Ecole Polytechnique, 91128 Palaiseau, (France).
C. Chenais-Popovics
Affiliation:
Laboratoire de Physique des Milieux Ionisés, Laboratoire du CNRS, Ecole Polytechnique, 91128 Palaiseau, (France).
B. Etlicher
Affiliation:
Laboratoire de Physique des Milieux Ionisés, Laboratoire du CNRS, Ecole Polytechnique, 91128 Palaiseau, (France).
J.-C. Gauthier
Affiliation:
Laboratoire de Physique des Milieux Ionisés, Laboratoire du CNRS, Ecole Polytechnique, 91128 Palaiseau, (France).
J.-P. Geindre
Affiliation:
Laboratoire de Physique des Milieux Ionisés, Laboratoire du CNRS, Ecole Polytechnique, 91128 Palaiseau, (France).
C. Rouillé
Affiliation:
Laboratoire de Physique des Milieux Ionisés, Laboratoire du CNRS, Ecole Polytechnique, 91128 Palaiseau, (France).

Abstract

We have studied experimentally the relation between the preionization of a plasma micro-channel in Argon at atmospheric pressure and the dynamics of the discharge initiated by preionization. Preionization is obtained in two different ways: (a) injecting the soft X rays produced by a 3 J, 3 ns YAG laser focused on a copper target through a pinhole (b) direct focusing of a 4ω laser (0·26 μm) along the Argon column. Both experiments and simple numerical models are presented in this paper.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1989

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