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(EXP2/03) Dimensionally Similar Studies of Confinement and H-mode Transition in ASDEX Upgrade and JET

  (This paper was rapporteured in lecture EX7/2)  

 
F. Ryter , J. Stober , W. Suttrop , J. C. Fuchs , O. Gruber , H. Meister , H. Murmann , S. de Peña Hempel , H. Salzmann , J. Schweinzer  and the ASDEX Upgrade Team 
Max-Planck-Institut für Plasmaphysik, EURATOM-IPP Association, Garching and Berlin, Germany
 
J. P. Christiansen , G. Huysmans , P. Lomas , C. Lowry , B. Schunke , B. Tubbing  and JET Team 

JET Joint undertaking, Abingdon, OX 14 3EA England

Abstract
Joint experiments on confinement and L-H transition  were performed in ASDEX Upgrade  and JET . The confinement experiments suggest that the invariance principle is not always fulfilled at high density. For the L-H transition studies, the dimensionless variables taken at the plasma edge can be in general only made identical per pair, due to the condition imposed by the L-H transition. This new approach to investigate the L-H physics suggests a weak dependence of the L-H transition mechanism on collisionality .

 

Read the full paper in PDF format.