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Abstract

The aim of the work described is to characterise the dithering cycles in the ASDEX Upgrade tokamak and use the information obtained to describe the bifurcation character of the L-H transition. A detailed experimental study of the change of T(e) in the edge during the cycle is presented. It is shown that the changes are consistent with the assumption of the periodic build-up and destruction of the edge transport barrier characteristic of the H-mode. A study of the conditions under which the cycles occur reveals that with the unfavourable drift direction, the cycles are suppressed. These observations are interpreted in a schematic bifurcation diagram.

Additional information

Authors: ZOHM H ET AL., Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Article: Plasma Physics and Controlled Fusion, Vol. 37 (1995) pp. 437-446
Record Number: 199510612 / Last updated on: 1995-06-06
Category: PUBLICATION
Original language: en
Available languages: en