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19 April 2024

» pubmed » pmid17678097

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Active control of type-I edge-localized modes with n=1 perturbation fields in the JET tokamak
Y Liang ; H R Koslowski ; P R Thomas ; E Nardon ; B Alper ; P Andrew ; Y Andrew ; G Arnoux ; Y Baranov ; M Bécoulet ; M Beurskens ; T Biewer ; M Bigi ; K Crombe ; E De La Luna ; P de Vries ; W Fundamenski ; S Gerasimov ; C Giroud ; M P Gryaznevich ; N Hawkes ; S Hotchin ; D Howell ; S Jachmich ; V Kiptily ; L Moreira ; V Parail ; S D Pinches ; E Rachlew ; O Zimmermann ;
Date:	29 Jun 2007
Journal:	Phys Rev Lett, 98 (26), 265004
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 D(alpha) signal decreased. The energy loss per ELM normalized to the total stored energy, DeltaW/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.
Source:	PubMed, pmid17678097
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