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Abstract

The MHD activity has been monitored in the ASDEX tokamak during ELMs. Besides a fast inward shift of the plasma column, a helical MHD perturbation has been found to accompany every ELM. In general the helical instability has an m number of 3 or 4, an n number of 1, and it propagates in the direction of the electron diamagnetic drift. It seems to be identical with the Toi mode, which had been observed to disappear during L to H transitions.

Additional information

Authors: VON GOELER S, Princeton University (US);KLÜBER O, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);FUSSMAN G, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);GERNHARDT J, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);KORNHERR M, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE);KLUBER O, Max-Planck-Institut fur Plasmaphysik, Garching bei Munchen (DE)
Bibliographic Reference: Report: III/143 EN (1989)
Availability: Available from Max-Planck-Institut für Plasmaphysik, 8046 Garching bei München (DE)
Record Number: 198910584 / Last updated on: 1994-12-01
Category: PUBLICATION
Original language: en
Available languages: en