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Single-particle motion under the influence of the perpendicular ponderomotive force

Published online by Cambridge University Press:  13 March 2009

M. C. Festeau-Barrioz
Affiliation:
Centre de Recherches en Physique des Plasmas, Association Euratom – Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne, 21, Av. des Bains, CH-1007 Lausanne, Switzerland
M. L. Sawley
Affiliation:
Centre de Recherches en Physique des Plasmas, Association Euratom – Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne, 21, Av. des Bains, CH-1007 Lausanne, Switzerland
J. Václavík
Affiliation:
Centre de Recherches en Physique des Plasmas, Association Euratom – Confédération Suisse, Ecole Polytechnique Fédérale de Lausanne, 21, Av. des Bains, CH-1007 Lausanne, Switzerland

Abstract

The motion of a single particle under the influence of the ponderomotive force directed perpendicular to the external magnetostatic field is analysed. By solving the exact equation of motion for a specific applied electromagnetic field, the resultant ponderomotive drift is compared with the prediction of a single-particle theory using the oscillation-centre approximation. The regime of validity of this theory is discussed. It is shown that, for certain values of the amplitude and frequency of the electromagnetic field, the particle motion is unstable and therefore the concept of a single-particle ponderomotive force is meaningless.

Type
Research Article
Copyright
Copyright © Cambridge University Press 1987

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