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A reduced global Alfven eigenmodes model for Mirnov array data on the H-1NF heliac

Bertram, Jason; Hole, Matthew; Pretty, David; Blackwell, Boyd; Dewar, Robert


We extend a reduced-dimension stellarator ideal-MHD normal-mode model to include a vacuum region, and describe magnetic fluctuations in the H-1 heliac. We apply the reduced model to a magnetic field configuration with high density and compute the two lowest frequency global Alfvén eigenmodes (GAEs): (m, n) = (4, 5) and (7, 9). The poloidal mode number, predicted frequency and radial attenuation profile are then compared with measurements from a poloidal Mirnov array. Of the two candidates, the...[Show more]

CollectionsANU Research Publications
Date published: 2011
Type: Journal article
Source: Plasma Physics and Controlled Fusion
DOI: 10.1088/0741-3335/53/8/085023


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