Electron transport and the critical temperature gradient
Tore Supra electron thermal fluxes, analysed over a range of heating powers and plasma densities, are shown to vary parametrically according to the small-scale electron temperature gradient -ETG! Model, rather than the ion inertial scale electrostatic gyro-Bohm model. Steady-state power balance analysis and time-varying interpretative transport simulations, performed on the Tore Supra Fast Wave Electron Heating database, validate the ETG thermal flux-versus-gradient relation and the existence of a critical electron temperature gradient. The critical gradient length R/L(c) and the parametric dependence of the thermal flux, q(e)(n(e) ,T(e) ,Delta T(e) ,q,s), agree well with the ETG model.
Bibliographic Reference: An article published in: Physics of Plasmas, Volume 11, Number 5, May 2004
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Record Number: 200417506 / Last updated on: 2004-05-10
Original language: en
Available languages: en