Optimised Shear Discharges in the Gasbox Divertor in JET

摘要

Regimes with Internal Transport Barriers provide a route for enhanced performance in Tokamak experiments. In the past few years, research has concentrated on heating during the current rise phase of the discharge in conditons of weak or reversed magnetic shear in the centre. In JET, experiments on internal transport barriers were stated during the Mark IIa divetor campaign (1996/1998)[1,2]. This paper gives an overview of some key points of he experiments performed in discharges with ITB's in the MarkII Gas Box divertor, a more closed divertor compared to Mark IIa.