L-H transition in the Mega-Amp spherical tokamak

TitleL-H transition in the Mega-Amp spherical tokamak
Publication TypeJournal Article
Year of Publication2002
AuthorsR.J Akers, G.F Counsell, A. Sykes, L.C Appel, E.R Arends, C. Byrom, P.G Carolan, N.J Conway, G. Cunningham, A. Dnestrovskij, Y.N Dnestrovskij, A.R Field, S.J Fielding, M. Gryaznevich, P. Helander, A. Kirk, S. Korsholm, R. Martin, H. Meyer, M.PS Nightingale, C.M Roach, V. Shevchenko, M. Torunianski, M.J Walsh, C.D Warrick
JournalPhysical Review Letters
Volume88
Number3
Pagination4
Date PublishedJan
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000173460200019
KeywordsPLASMAS
Abstract

H-mode plasmas have been achieved on the MAST spherical tokamak at input power considerably higher than predicted by conventional threshold scalings. Following L-H transition, a clear improvement in energy confinement is obtained, exceeding recent international scalings even at densities approaching the Greenwald density limit. Transition is accompanied by an order-of-magnitude increase in edge-density gradient, a marked decrease in turbulence, the efficient conversion of internal electron Bernstein waves into free space waves, and the onset and saturation of edge poloidal rotation.

URL<Go to ISI>://000173460200019
Division

Fusion Physics

Department

Instrumentation development

PID

5ff05dd64d786351315e500447639c9b

Alternate TitlePhys. Rev. Lett.

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