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deGrassie, J.S.; Ohyabu, N.; Brooks, N.H.
GA Technologies, Inc., San Diego, CA (USA); Texas Univ., Austin (USA). Fusion Research Center1984
GA Technologies, Inc., San Diego, CA (USA); Texas Univ., Austin (USA). Fusion Research Center1984
AbstractAbstract
[en] The ergodic magnetic limiter coils on TEXT have been reconfigured to produce the primary helical perturbation resonance at m = 7 / n = 3. The experiments continue to demonstrate that the weak resonant perturbations modify the edge conditions in keeping with model predictions. We observe a reduction in the intrinsic impurity levels accompanying the helical current pulse, presumably the result of a reduction in the electron temperature in the edge. Heat follows the perturbed field lines to the limiter, generating heat load patterns which reflect the geometry of a magnetic island - limiter intersection. A strong spatial modulation of the electron density in the scrape-off-layer also reflects the helical mode structure
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May 1984; 20 p; 6. international conference on plasma surface interactions in controlled fusion devices; Nagoya (Japan); 14-18 May 1984; CONF-840520--23; Available from NTIS, PC A02/MF A01 as DE85001390
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