The deteriorating effect of plasma density fluctuations on microwave beam quality
- Koehn, 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
Publication date
January 2019
DOI Publisher
E D P SCIENCES Journal
EPJ Web of ConferencesAbstract
| openaire: EC/H2020/633053/EU//EUROfusionTurbulent 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.Peer reviewe
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