Heat and particle transport simulation in COMPASS and T-10 with Canonical Profile Transport Model

摘要

The remarkable property of tokamak plasma to maintain the shape of some parameters profiles (e.g. the electron pressure and temperature, toroidal rotation velocity) under different external influences has been discussed since early eighties [1, 2]. This effect is considered as manifestation of plasma self-organization and provides the basis for the Canonical Profile Transport Model (CPTM) [3]. Despite the large number of observations of this phenomenon, the understanding of its real nature still provides challenge for investigators. In the last decade certain hopes have been connected with zonal flows and their high frequency branch geodesic acoustic mode (GAM). The link between broadband density/potential fluctuations and GAMs has been observed in T-10 [4, 5, 6]. In both COMPASS and T-10, the bicoherence analysis confirmed the nonlinear energy exchange between GAMs and the ambient turbulence [7, 8].