Observation of Reversed Shear Alfvén Eigenmodes between Sawtooth Crashes in the Alcator C-Mod Tokamak
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Groups of frequency chirping modes observed between sawtooth crashes in the Alcator C-Mod
tokamak are interpreted as reversed shear Alfve´n eigenmodes near the q ¼ 1 surface. These modes
indicate that a reversed shear q profile is generated during the relaxation phase of the sawtooth cycle. Two
important parameters, qmin and its radial position, are deduced from comparisons of measured density
fluctuations with calculations from the ideal MHD
Date issued
2009-04Department
Massachusetts Institute of Technology. Plasma Science and Fusion CenterJournal
Physical Review Letters
Publisher
American Physical Society
Citation
Edlund, E. M. et al. “Observation of Reversed Shear Alfvén Eigenmodes between Sawtooth Crashes in the Alcator C-Mod Tokamak.” Physical Review Letters 102.16 (2009): 165003. © 2009 The American Physical Society.
Version: Final published version
ISSN
0031-9007