LOCAL TRANSPORT IN TOKAMAKS AND ITS RELATION TO PLASMA TURBULENCE
The flux surface averaged confinement in the ohmic, L and H regimes of ASDEX is compared with predictions from microscopic low frequency turbulence. The transport properties of thermal plasmas and energetic particles derived from computer modelling are summarized. It is found that low frequency electric turbulence does not contradict the transport behaviour in the various confinement regimes. The weak time dependence of the electron heat diffusivity and diffusion coefficient within a given regime suggests that stationary turbulence is present. Likely candidates for driving the L and H turbulence are drift instabilities of the dissipative trapped particle type.
Bibliographic Reference: WRITE TO MAX-PLANCK-INSTITUT FUER PLASMAPHYSIK, 8046 GARCHING BEI MUENCHEN (GERMANY), MENTIONING REPORT IPP III/104, 1985
Record Number: 1989124042200 / Last updated on: 1987-01-01
Available languages: en