Fast Ion Induced Shearing of 2D Alfven Eigenmodes Measured by Electron Cyclotron Emission Imaging

TitleFast Ion Induced Shearing of 2D Alfven Eigenmodes Measured by Electron Cyclotron Emission Imaging
Publication TypeJournal Article
Year of Publication2011
AuthorsB.J Tobias, I.G.J. Classen, C.W. Domier, W.W Heidbrink, NC Luhmann, Jr., R. Nazikian, H.K Park, D.A Spong, M.A VanZeeland
JournalPhysical Review Letters
Volume106
Issue7
Number7
Pagination075003
Date PublishedFeb
Type of ArticleArticle
ISBN Number0031-9007
KeywordsAXISYMMETRICAL TOROIDAL PLASMAS, GYROFLUID MODEL, PROFILE, SPECTRUM
Abstract

Two-dimensional images of electron temperature perturbations are obtained with electron cyclotron emission imaging (ECEI) on the DIII-D tokamak and compared to Alfven eigenmode structures obtained by numerical modeling using both ideal MHD and hybrid MHD-gyrofluid codes. While many features of the observations are found to be in excellent agreement with simulations using an ideal MHD code (NOVA), other characteristics distinctly reveal the influence of fast ions on the mode structures. These features are found to be well described by the nonperturbative hybrid MHD-gyrofluid model TAEFL.

URLhttp://oasis.postech.ac.kr/bitstream/2014.oak/12485/1/OAIR003284.pdf
DOI10.1103/PhysRevLett.106.075003
Division

FP

Department

PDG

PID

b80332580b3a24f4f9ca02b96bbc3e72

Alternate TitlePhys. Rev. Lett.

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