Characteristics of edge pedestal width in JT-60U ELM-free H-mode plasmas
- 1 June 1998
- journal article
- Published by IOP Publishing in Plasma Physics and Controlled Fusion
- Vol. 40 (6), 1073-1083
- https://doi.org/10.1088/0741-3335/40/6/013
Abstract
The edge pedestal widths in ion and electron temperature profiles for H-mode discharges have been measured during an ELM-free phase over a wide range of plasma current of 1-4.5 MA in JT-60U. The pedestal width of the ion temperature indicates a dependence on both inverse poloidal field and edge ion temperature. As a result, it is shown that the pedestal width linearly scales like , where is the inverse aspect ratio and is the poloidal gyroradius for thermal ions. The pedestal width is also compared with theoretical predictions.Keywords
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