Fr actal gr owth of dust and globular films in T-10 tokamak.

A lot of films samples, found in tokama ks, exhibit fractal structure of surface organized in hierarchical way of structures like globe-shape and cauliflower-shape[1], ovoidal structures, stratified and columnar shape[2]. Film samples from the T-10 tokamak reveals the self-similarity of fractal structure on 4 order of magnitude, from 10 nm up to 100om [3]. To describe surface texture we have used fractal analysis, allowed to distinguish a variation in morphology by fractal dimension and exponent of complexity (socalled Hurst exponent). We have provided a description of the films fractal growth mechanism by diffusion limited aggregation (DLA) model [4], that is widely applicable for the discription of a lot of natural phenomena. The aspects of the films growth mechanism is considered to consist with statistics of deposited particles dynamics. We stress the importance of the edge plasma turbulence statistics: the deposited particles trajectory is not a standard random Brownian motion (classic diffusion), rather stochastic Levy-type diffusion driven by edge turbulence electric field possessed non-Gaussian statistics. Fr actal fimension of topogr aphic sur face and statistics of the edge plasma tur bulence.