Publication Type
Journal
Journal Name
Physical Review Letters
Publication Date
Page Number
265004
Volume
98
Issue
26
Abstract
Type-I edge-localized modes (ELMs) have been mitigated at the JET tokamak using a static external n=1 perturbation field generated by four error field correction coils located far from the plasma. During the application of the n=1 field the ELM frequency increased by a factor of 4 and the amplitude of the Dα signal decreased. The energy loss per ELM normalized to the total stored energy, ΔW/W, dropped to values below 2%. Transport analyses shows no or only a moderate (up to 20%) degradation of energy confinement time during the ELM mitigation phase.
