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Intrinsic stochasticity is the process describing the chaotic response of a plasma to a regular, non-chaotic applied force. The paper discusses solutions of the particle dynamic equation which exhibit stochasticity. "Phase" transactions are considered between a regular state, where charged particles in applied fields execute orbits in a limited region of phase-space and a state where any particle can be expected to appear at every point of phase space. The equation for a realisable plasma geometry is derived and the dynamic driving force described. Experimentally, laser-induced fluorescence is used to investigate intrinsic stochasticity in ion waves at above-threshold intensities of the drift-wave. The actual velocity distribution functions have been obtained from the results, as well as preliminary data on spatial diffusion. It is noted that intrinsic stochasticity can occur under relatively weak perturbations and can dominate classical processes by several orders of magnitude.

Additional information

Authors: STERN R A, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne (CH)
Bibliographic Reference: Report: LRP 366/88 EN (1988)
Availability: Available from Confédération Suisse, Centre de Recherches en Physique des Plasmas, Ecole Polytechnique Fédérale de Lausanne, 21 avenue des Bains, 1007 Lausanne (CH)
Record Number: 198910598 / Last updated on: 1994-12-01
Original language: en
Available languages: en
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