Study on MHD activity in Tokamaks

Details Study on MHD activity in Tokamaks Study on MHD activity in Tokamaks

2004-10-06

arxiv.org/abs/physics/0410032v1

Physics

Plasma Physics

12th International Congress on Plasma Physics, 25-29 October 2004, Nice (France)

Scientific paper

The tearing mode instability and the associated magnetic islands can lead to a degradation of tokamak plasma performance and eventually to a disruption. A crucial issue for the extension of advanced tokamak scenarios to long pulse operation is to avoid these MHD instabilities. Prevention of disruptions and limitations of adverse effect on energy confinement depend on the avoidance of formation of magnetic islands, and it depends also on the successful control of the growth modes excited by intrinsic plasma effects such as the neo-classical drive of unfavourable bootstrap current gradient at some q rational surfaces. In this paper are described in the influence of mode coupling on the nonlinear evolution of rotating magnetic islands.

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