title: Plasma markovian noise studied with a fractional relaxation model.
abstract: Fluctuations can give useful information about the system under study. Here, particle density fluctuations in magnetically confined toroidal plasmas are studied using noise theory. Homogenous and stationary statistics are considered and correlations of fluctuations are calculated for markovian systems. The relaxation of fluctuations is modeled by the space-fractional diffusion equation. Effects of different parameters of this model on correlations have been obtained. The results identify the two fluctuating regimes observed in experiments, which are related to diffusive and wave propagation of the mass in the system.
authors.affiliation: Department of Physics, Shahid Beheshti University, G. C., Evin, Tehran 19839, Iran.
authors.forename: M
authors.initials: M
authors.lastname: Vahabi
authors.forename: M H
authors.initials: MH
authors.lastname: Allami
authors.forename: B
authors.initials: B
authors.lastname: Shokri