The deteriorating effect of plasma density fluctuations on microwave beam quality
Plasma Physics
2019-05-01 v1
Abstract
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.
Keywords
Cite
@article{arxiv.1805.09594,
title = {The deteriorating effect of plasma density fluctuations on microwave beam quality},
author = {Alf Köhn and Max E. Austin and Michael W. Brookman and Kenneth W. Gentle and Lorenzo Guidi and Eberhard Holzhauer and Rob J. La Haye and Jarrod B. Leddy and Omar Maj and Craig C. Petty and Emanuele Poli and Terry L. Rhodes and Antti Snicker and Matthew B. Thomas and Roddy G. L. Vann and Hannes Weber},
journal= {arXiv preprint arXiv:1805.09594},
year = {2019}
}
Comments
EPJ Web of Conferences, EC-20 2018 Proceedings, submitted