[Zurück]

F. Laggner, E. Wolfrum, F. Mink, M. Cavedon, M. Dunne, P. Manz, G. Birkenmeier, R. Fischer, M. Maraschek, E. Viezzer, M. Willensdorfer, F. Aumayr, -. EUROfusion MST1 Team, . ASDEX Upgrade Team:
"Inter-ELM pedestal evolution: High frequency magnetic fluctuations correlated with the clamping of the pressure gradient";
Vortrag: 43rd EPS Conference on Plasma Physics, Leuven/Belgium; 07.06.2016; in: "Proceedings 43rd EPS Conference on Plasma Physics, Europhys. Conf. Abstracts", (2016), ISBN: 2-914771-99-1; S. 1 - 4.

The widely accepted theory to explain the stability limit of the pedestal is the peeling-ballooning
theory [1]. However, the temporal approach of this limit, i.e. the inter-ELM profile evolution,
is still not fully understood. The evolution of the inter-ELM electron density (ne) and electron
temperature (Te) profiles has been the subject of detailed investigations, utilising fast edge profile
measurements [2]. It has been found that the fully developed maximum gradients of density
and temperature prior to the ELM onset stay almost constant for a period of the order of milliseconds.
In this last phase of the ELM cycle, several experiments [3, 4, 5, 6] report the onset of
high frequency magnetic fluctuations with frequencies larger than 150 kHz that originate from
the plasma edge region.