Non-linear response of plasma ions in linear electrostatic waves
Experiments are presented which test the applicability of the Hamiltonian single particle theory to wave-particle interactions. This theory describes the chaotic acceleration of plasma ions by electrostatic waves. The Hamiltonian description gives predictions of the threshold, fast time scale, details of the distribution function and conservation of three integrals of the motion while some of the integrals have been broken by the overlap of resonances. Both electrostatic ion cyclotron and Bernstein waves are launched from antennae at the plasma boundary. Ion motions are observed by Laser Induced Fluorescence (LIF) and optical tagging. The linear response of the ion to the wave is distinguished from the chaotic response. Several predictions of the single particle theory are observed in the experiments. In addition, evidence of self-consistent effects have been observed.
Bibliographic Reference: Paper presented: International Workshop "Non-linear Phenomena in Vlasov Plasmas" Cargèse, Corsica (FR) July 11-16, 1988 Proceedings published by Editions de Physique, Orsay (FR) 1989, pp. 237-254
Availability: Available from (1) as Paper EN 34771 ORA
Record Number: 198910426 / Last updated on: 1994-12-01
Original language: en
Available languages: en