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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

The deteriorating effect of plasma density fluctuations on microwave beam quality

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  • Media type: E-Article
  • Title: The deteriorating effect of plasma density fluctuations on microwave beam quality
  • Contributor: 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
  • Published: EDP Sciences, 2019
  • Published in: EPJ Web of Conferences, 203 (2019), Seite 01005
  • Language: Not determined
  • DOI: 10.1051/epjconf/201920301005
  • ISSN: 2100-014X
  • Keywords: General Earth and Planetary Sciences ; General Engineering ; General Environmental Science
  • Origination:
  • Footnote:
  • Description: 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.
  • Access State: Open Access