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
Date PublishedJan
Type of ArticleArticle
ISBN Number0031-9007
Accession NumberISI:000173460200019

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.

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Fusion Physics


Instrumentation development



Alternate TitlePhys. Rev. Lett.

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