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Abstract

The coherent CO(2) laser scattering signals from TFR Tokamak plasmas have been analysed using a variant of the algorithm proposed by Grassberger and Procaccia to determine the correlation exponent of these measured plasma turbulence signals. By comparing the results obtained with a randomly generated test signal, it is seen that the plasma turbulence may be considered as a dynamical system which possesses a low correlation exponent, the value of which depends on wavenumber of the measured turbulence, thus indicating the possible existence of a low dimensional attractor. It is shown by using different signals acquired at different sampling rates that this low dimensional structure is only observed when the acquisition rate of the turbulence signal is sufficiently rapid.

Additional information

Authors: BARKLEY H J, Institut für Plasmaforschung, Universität Stuttgart (DE);ANDREOLETTI J, CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR);GERVAIS F, CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR);OLIVAIN J, CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR);QUEMENEUR A, CEA, Département de Recherches sur la Fusion Contrôlée, Saint-Paul-lez-Durance (FR);TRUC A, École Polytechnique, Palaiseau (FR)
Bibliographic Reference: Article: Plasma Physics and Controlled Fusion, Vol.30 (1988), No. 3, pp.217-234
Record Number: 198910827 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en
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