Resonant Wave-Particle Interaction in Nonuniform Plasmas

L. Saitta 1  und F. Engelmann 2
  • 1 Istituto di Fisica Sperimentale, Politecnico di Torino, Torino, Italy.
  • 2 Laboratori Gas Ionizzati (Associazione EURATOM-CNEN), Frascati, Rome, Italy


The appearance of resonant-particle effects in the linear dynamics of electron waves in a plasma whose electrons are trapped in a potential trough is discussed and conditions for the characteristic times involved are derived. For the special case of a parabolic potential trough it is shown that, within a limited time interval, a strong resonant effect may occur, due to the interaction of a wave with all particles, which is not contained in the solutions given so far.

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