Estimate of the correlation dimension for tokamak plasma turbulence
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.
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
Original language: en
Available languages: en