[Zurück]

M. Cavedon, T. Pütterich, E. Viezzer, G. Birkenmeier, T. Happel, F. Laggner, F. Ryter, U. Stroth, . ASDEX Upgrade Team:
"Study of the edge radial electric field during the L-H transition at ASDEX Upgrade";
in: "Proc. 42nd EPS Conference on Plasma Physics, Europhys. Conf. Abstracts", Vol. 39E; EPS Conference on Plasma Physics, 2015, ISBN: 2-914771-98-3, S. 11301 - 11304.

In 1982, a regime with improved confinement (H-mode) was discovered at ASDEX [1]. The
H-mode exhibits an edge transport barrier (ETB), a region of reduced particle and energy transport
at the plasma edge. It is widely accepted that E B velocity shear, caused by the local
radial electric field Er, is responsible for the suppression of turbulence and therefore for the
establishment of the ETB. The formation of the ETB coincides with the transition from the low
confinement mode (L-mode) to the H-mode and it is triggered when heating power exceeds a
certain threshold Pthr, scaling in [2].