Turbulent correlations and anomalous transport in tokamaks. II. Applications to text

For pt.I see ibid., vol.31, p.965 (1989). A parallel kinetic approach is adopted to explain and interpret recent measurements relating to plasma turbulence and transport in the TEXT Tokamak. It is shown that the knowledge of experimentally determined profiles of density, temperature and source strengths combined with measurements of a single fluctuating quantity (i.e. electrostatic potential) can be used to account for energy and particle fluxes and turbulent correlations with other fluctuations (e.g. density) measured in the device. The theory predicts the magnetic fluctuation spectrum which is consistent with the measured density fluctuations. It suggests, independently of the mechanisms responsible for the observed turbulent spectra, that the observed transport properties are explainable in terms of the electromagnetic turbulence in TEXT. A notable feature of the results is the fact that semi-quantitative agreement with experiment (well within experimental errors in several cases) is secured even though the theoretical model neglects toroidal/trapped particle effects entirely.