Author/Authors :
Solano، نويسنده , , Emilia R. and Jachmich، نويسنده , , S. and Villone، نويسنده , , F. R. Hawkes، نويسنده , , N. and Corre، نويسنده , , Y. and Pitts، نويسنده , , R.A. and Loarte، نويسنده , , A. and Alper، نويسنده , , B. and Guenther، نويسنده , , K. and Koroktov، نويسنده , , A. and Stamp، نويسنده , , M. and Andrew، نويسنده , , P. and Arshad، نويسنده , , S.A. and Conboy، نويسنده , , J. and Bolzonella، نويسنده , , T. and Rachlew، نويسنده , , E. ، نويسنده ,
Abstract :
If an ELM is a peeling of flux surfaces from the plasma, due to a broken separatrix, current density is lost as well as particles and energy. The fast loss of a current-carrying plasma layer modifies the plasma equilibrium, leading to sudden shifts in the strike points at each ELM, towards the plasma centre. An experimental study of this conjectured model of the ELM has been made at JET, showing that in all cases of Type I ELMs studied, strike point shifts were observed. In two cases studied in detail, the estimated equilibrium changes provoked by flux surface peeling agree qualitatively with the observed strike point shifts.
Keywords :
Elm , Edge currents , Edge plasma , Edge pedestal , JET
