Pellet fuelling of plasmas with ELM mitigation by resonant magnetic perturbations in MAST

Pellet fuelling of plasmas with ELM mitigation by resonant magnetic perturbations in MAST

Pellet fuelling of plasmas with ELM mitigation by resonant magnetic perturbations in MAST 150 150 Mathew

Pellet fuelling of plasmas with ELM mitigation by resonant magnetic perturbations in MAST

Shallow fuelling pellets are injected from the high field side into plasmas in which ELMs have been mitigated using external magnetic perturbation coils. The data are compared with ideal assumptions in the ITER fuelling model, namely that mitigated ELMs are not affected by fuelling pellets. Firstly it is shown that during the pellet evaporation an ELM is triggered, whose amplitude could be larger than a non-pellet induced RMPmitigated ELM. Secondly, a favourable example is shown in which post-pellet particle losses due to mitigated ELMs are similar to the non-pellet case, however unfavourable counter-examples also exist.

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19/10/2012