Supershot to limiter H-mode transitions in deuterium plasmas in TFTR

C. E. Bush, N. Bretz, R. Budny, E. J. Synakowski, S. H. Batha, R. Durst, P. C. Efthimion, R. J. Fonck, E. D. Fredrickson, F. M. Levinton, S. Paul, G. Taylor

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Abstract

Supershot to limiter H-mode transitions have been studied on TFTR. In several cases an edge poloidal rotation was observed prior to the initial D alpha drop at the transition. This spin-up is consistent with formation of a radial electric field, -Er. The Del pI contribution to Er is approximately 30 kV/m and the density fluctuation level is reduced by a factor of 1 to 1.5 over a 5 cm region at the plasma edge across the transition.

Original languageEnglish
Article number020
Pages (from-to)A153-A158
JournalPlasma Physics and Controlled Fusion
Volume36
Issue number7 A
DOIs
StatePublished - 1994

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