Dependence of H-mode power threshold on global and local edge parameters
- 1 August 1996
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 38 (8) , 1249-1253
- https://doi.org/10.1088/0741-3335/38/8/017
Abstract
Measurements of local electron density , electron temperature and ion temperature have been made at the very edge of the plasma just prior to the transition into H-mode for four different single parameter scans in the DIII-D tokamak. The means and standard deviations of , and under these conditions for a value of the normalized toroidal flux of 0.98 are, respectively, , keV, and keV. The threshold condition for the transition is more sensitive to temperature than to density. The data indicate that the dependence is not as simple as a requirement for a fixed value of the ion collisionality.Keywords
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