Pellet fuelling with edge-localised modes controlled by external magnetic perturbations in MAST
Valovic, M · Garzotti, L · Gurl, C · Kirk, A · Dunai, D · Field, A R · Lupelli, I · Naylor, G · Thornton, A
Original · EN
The fuelling of plasmas by shallow frozen pellets with simultaneous mitigation of edge localised modes (ELM) by external magnetic perturbation is demonstrated on the MAST tokamak. Post-pellet particle loss is dominated by ELMs and inter-ELM gas fuelling. It is shown that the size of post-pellet ELMs can be controlled by external magnetic perturbations. Post-pellet ELMs remove particles from the large part of pellet deposition zone including the area with positive density gradient. The mechanism explaining this peculiarity of particle loss is suggested.
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