Applications of noise theory to plasma fluctuations

Noise theory is used to study the temporal correlations of stationary random fluctuations that are homogeneous in space. Statistical properties of the fluctuations, such as the power spectrum and the correlation function, are computed. The results are compared with the observed plasma density fluctuations from tokamak experiments.

Figure 1

The dots represent the autopower spectrum data of the fractional plasma density fluctuations from tokamak experiments [9]. The curve is given by Eq. (26).

Figure 2

The dots represent the autocorrelation data of the plasma density fluctuations from helimak experiments. The curve is given by Eq. (25).

Figure 3

The dots represent the square root of the autopower spectrum data of the fractional plasma density fluctuations from helimak experiments. The curve is given by the square root of Eq. (26).