University of California, Irvine, CA, USA
+) Alfvén Laboratory, Teknikringen 31, KTH, SE-100 44 Stockholm, Sweden
*) FOM Institute of Plasma Physics, Rihnhuizen, Nieuwegen, Netherlands
Fluctuations produced by beam-driven toroidicity-induced Alfvén eigenmode (TAE) activity in the DIII-D tokamak are measured by a poloidal array of magnetic probes and compared with the wave fields computed by two theoretical models. Fluid-resistive models compute continuum-damped TAE modes. A kinetic plasma model that retains Landau damping and finite Larmor radius effects computes global drift-kinetic Alfvén eigenmodes. The probes phases disagre with both theoretical predictions, while the amplitudes agree best with the kinetic model.
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