Fast-ion losses due to high-frequency MHD perturbations in the ASDEX upgrade tokamak

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dc.contributor.authorGarcia-Munoz, Miguel
dc.contributor.authorFahrbach, H. U.
dc.contributor.authorGuenter, Sibylle
dc.contributor.authorIgochine, Valentin
dc.contributor.authorMantsinen, Mervi J.
dc.contributor.authorMaraschek, M.
dc.contributor.authorMartin, Piero
dc.contributor.authorPiovesan, Pablo
dc.contributor.authorSassenberg, Karl
dc.contributor.authorZohm, H.
dc.date.accessioned2017-09-08T09:15:48Z
dc.date.available2017-09-08T09:15:48Z
dc.date.issued2008
dc.description.abstractTime-resolved energy and pitch angle measurements of fast-ion losses correlated in frequency and phase with high-frequency magnetohydrodynamic perturbations have been obtained for the first time in a magnetic fusion device and are presented here. A detailed analysis of fast-ion losses due to toroidal Alfven eigenmodes has revealed the existence of a new core-localized magnetohydrodynamic perturbation, the sierpes mode. The sierpes mode is a non-Alfvenic instability which dominates the losses of fast ions in ion cyclotron resonance heated discharges, and it is named for its footprint in the spectrograms ("sierpes" means "snake" in Spanish). The sierpes mode has been reconstructed by means of highly resolved multichord soft-x-ray measurements.en
dc.description.statusPeer revieweden
dc.description.versionPublished Versionen
dc.format.mimetypeapplication/pdfen
dc.identifier.articleid55005
dc.identifier.citationGarcía-Muñoz, M., Fahrbach, H. U., Günter, S., Igochine, V., Mantsinen, M. J., Maraschek, M., Martin, P., Piovesan, P., Sassenberg, K. and Zohm, H. (2008) 'Fast-ion losses due to high-frequency MHD perturbations in the ASDEX upgrade tokamak', Physical Review Letters, 100(5), 055005 (4pp). doi: 10.1103/PhysRevLett.100.055005en
dc.identifier.doi10.1103/PhysRevLett.100.055005
dc.identifier.issn0031-9007
dc.identifier.issued5
dc.identifier.journaltitlePhysical Review Lettersen
dc.identifier.urihttps://hdl.handle.net/10468/4644
dc.identifier.volume100
dc.language.isoenen
dc.publisherAmerican Physical Societyen
dc.relation.urihttps://journals.aps.org/prl/abstract/10.1103/PhysRevLett.100.055005
dc.rights© 2008, American Physical Societyen
dc.subjectAlfven instabilitiesen
dc.subjectScintillator probeen
dc.subjectNeutral beamen
dc.subjectModesen
dc.subjectDiagnosticsen
dc.subjectTransporten
dc.subjectPlasmasen
dc.subjectparticlesen
dc.subjectEigenmodeen
dc.subjectDrivenen
dc.titleFast-ion losses due to high-frequency MHD perturbations in the ASDEX upgrade tokamaken
dc.typeArticle (peer-reviewed)en
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