Parallel and poloidal fluxes in turbulent non-ohmic plasmas: An ion-cyclotron resonance heating case

The parallel component of the vectorial fluxes, in particular the ion parallel particle flux h(parallel to)(i(1)) and the ion parallel heat flux h(parallel to)(i(3)), in an electrostatic turbulent magnetically confined plasma submitted to an external rf heating are obtained analytically in terms of the thermodynamic forces. Their expressions are derived using the methodology of neoclassical transport theory, the standard model of magnetic field and assuming a non-ohmic heating in the ion cyclotron resonance heating range for which a decoupling of the electron to the ion dynamics may be admitted as a first approximation. It is shown that all but one of the ion parallel turbulent transport coefficients related to a spectrum of electrostatic fluctuations are drastically reduced when the rf power density measured in terms of the Stix parameter is increased. The remaining coefficient, absent for an ohmic plasma increases with the Stix parameter. (C) 2003 American Institute of Physics.