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Analysis of experiments performed at different heating powers and magnetic field intensities shows that the existence of internal transport barriers in JET can be inferred in regions of space-time where the ratio of the ion gyroradius to the local gradient scale length exceeds some critical value. A possible interpretation leading to the theoretical relevance of this dimensionless parameter, as a local indicator of a bifurcated plasma state is the stabilisation of turbulence by the ExB shear flows associated with large pressure gradients and plasma rotation. Large database analysis and real time plasma control are envisaged as attractive applications.

Additional information

Authors: TRESSET G ET AL, Association Euratom-CEA Cadarache, St. Paul-lez-Durance (FR)
Bibliographic Reference: An article published in: Nuclear Fusion, 42 (May 2002), pp. 520-526
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Record Number: 200215048 / Last updated on: 2002-07-29
Original language: en
Available languages: en