The deteriorating effect of plasma density fluctuations on microwave beam quality

The deteriorating effect of plasma density fluctuations on microwave beam quality

Turbulent plasma edge density fluctuations can broaden a traversing microwave beam degrading its quality. This can be a problem for scenarios relying on a high spatial localization of the deposition of injected microwave power, like controlling MHD instabilities. Here we present numerical estimations...

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Bibliographic Details
Main Authors: Köhn Alf, Austin Max E., Brookman Michael W., Gentle Kenneth W., Guidi Lorenzo, Holzhauer Eberhard, La Haye Rob J., Leddy Jarrod B., Maj Omar, Petty Craig C., Poli Emanuele, Snicker Antti, Thomas Matthew B., Vann Roddy G. L., Weber Hannes
Format: Article
Language:English
Published: EDP Sciences 2019-01-01
Series:EPJ Web of Conferences
Online Access:https://www.epj-conferences.org/articles/epjconf/pdf/2019/08/epjconf_ec2018_01005.pdf
Description
Summary:Turbulent plasma edge density fluctuations can broaden a traversing microwave beam degrading its quality. This can be a problem for scenarios relying on a high spatial localization of the deposition of injected microwave power, like controlling MHD instabilities. Here we present numerical estimations of the scattering of a microwave beam by density fluctuations over a large parameter range, including extrapolations to ITER. Two codes are used, the full-wave code IPF-FDMC and the wave kinetic equation solver WKBeam. A successful comparison between beam broadening obtained from DIII-D experiments and corresponding full-wave simulations is shown.
ISSN:2100-014X

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