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Active control of type-I edge-localized modes with n=1 perturbation fields in the JET tokamak
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2007 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 98, no 26Article in journal (Refereed) Published
Abstract [en]

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, Delta W/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.

Place, publisher, year, edition, pages
2007. Vol. 98, no 26
Keyword [en]
asdex upgrade, plasmas, confinement, discharges, divertor
URN: urn:nbn:se:kth:diva-16739DOI: 10.1103/PhysRevLett.98.265004ISI: 000247625100029ScopusID: 2-s2.0-34547382532OAI: diva2:334782
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Rachlew, Elisabeth
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Atomic and Molecular Physics
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