Confinement and transport studies in TEXTOR in the presence of edge radial electric fields, below and above the H-mode threshold
The report describes the effect of radial electric fields (E(r)), induced in the edge of TEXTOR by means of a polarisation electrode, on the plasma edge profiles, the local particle transport and the global confinement. The studies include H-modes with either positive or negative E(r). The paper deals with the following issues: (i) the evolution of the edge profiles as a function of the magnitude and sign of E(r); (ii) the concomitant changes in electrostatic turbulence and transport in the edge; (iii) the effects on the bulk plasma parameters, in particular on energy and particle confinement; (iv) modelling studies to ascertain the physics underlying the orthogonal conductivity that shapes the electric field profiles in these experiments.
Bibliographic Reference: Article: 14th International Conference on Plasma Physics and Controlled Nuclear Fusion Research, Würzburg (DE) : Proceedings, Vol. 1 (1993) pp. 251-260
Record Number: 199410047 / Last updated on: 1994-11-28
Original language: en
Available languages: en