Author/Authors :
Jackson، نويسنده , , G.L. and Boedo، نويسنده , , J.A. and Lasnier، نويسنده , , C.J. and Leonard، نويسنده , , A.W. and McKee، نويسنده , , G.R. and Murakami، نويسنده , , M. and Wade، نويسنده , , M.R. and Watkins، نويسنده , , J.G. and West، نويسنده , , W.P. and Whyte، نويسنده , , D.G.، نويسنده ,
Abstract :
DIII-D, ELMing H-mode radiating mantle discharges have been obtained with electron density near the Greenwald density limit and a large fraction of the input power radiated inside the last closed flux surface, significantly reducing peak divertor heat fluxes. In these ‘puff and pump’ discharges, the introduction of argon reduces particle flux to divertor tiles by a factor of 4 while peak heat flux is half of the no impurity value, suggesting that impurity seeding may be a useful control tool to reduce wall heat and particle fluxes in fusion reactors. A robust H-mode transport barrier is maintained and there are only small changes in the ELM energy and ELM frequency.
Keywords :
DIII-D , Impurity seeding , SOl , H-mode
