The deteriorating effect of plasma density fluctuations on microwave beam quality

Alf Köhn; Max E. Austin; Michael W. Brookman; Kenneth W. Gentle; Lorenzo Guidi; Eberhard Holzhauer; Rob J. La Haye; Jarrod B. Leddy; Omar Maj; Craig C. Petty; Emanuele Poli; Terry L. Rhodes; Antti Snicker; Matthew B. Thomas; Roddy G. L. Vann; Hannes Weber

doi:10.1051/epjconf/201920301005

The deteriorating effect of plasma density fluctuations on microwave beam quality

Alf Köhn, Max E. Austin, Michael W. Brookman, Kenneth W. Gentle, Lorenzo Guidi, Eberhard Holzhauer, Rob J. La Haye, Jarrod B. Leddy, Omar Maj, Craig C. Petty, Emanuele Poli, Terry L. Rhodes, Antti Snicker, Matthew B. Thomas, Roddy G. L. Vann, Hannes Weber

Physics

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Journal	EPJ Web of Conferences
Volume	203
Issue number	01005
DOIs	https://doi.org/10.1051/epjconf/201920301005
Publication status	Published - 25 Mar 2019

Bibliographical note

© The Authors, published by EDP Sciences.

EPJ Web of Conferences, EC-20 2018 Proceedings

Keywords

physics.plasm-ph

Access to Document

10.1051/epjconf/201920301005Licence: CC BY

1805.09594v1
© 2019 The Authors, published by EDP Sciences.
Accepted author manuscript, 3.02 MBLicence: CC BY

20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
Vann, R. (Speaker)
14 May 2018 → 17 May 2018
Activity: Participating in or organising an event › Conference participation

Cite this

Köhn, A., Austin, M. E., Brookman, M. W., Gentle, K. W., Guidi, L., Holzhauer, E., Haye, R. J. L., Leddy, J. B., Maj, O., Petty, C. C., Poli, E., Rhodes, T. L., Snicker, A., Thomas, M. B., Vann, R. G. L., & Weber, H. (2019). The deteriorating effect of plasma density fluctuations on microwave beam quality. EPJ Web of Conferences, 203(01005). https://doi.org/10.1051/epjconf/201920301005

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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.",

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note = "{\textcopyright} The Authors, published by EDP Sciences. EPJ Web of Conferences, EC-20 2018 Proceedings",

year = "2019",

month = mar,

day = "25",

doi = "10.1051/epjconf/201920301005",

language = "English",

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TY - JOUR

T1 - The deteriorating effect of plasma density fluctuations on microwave beam quality

AU - Köhn, Alf

AU - Austin, Max E.

AU - Brookman, Michael W.

AU - Gentle, Kenneth W.

AU - Guidi, Lorenzo

AU - Holzhauer, Eberhard

AU - Haye, Rob J. La

AU - Leddy, Jarrod B.

AU - Maj, Omar

AU - Petty, Craig C.

AU - Poli, Emanuele

AU - Rhodes, Terry L.

AU - Snicker, Antti

AU - Thomas, Matthew B.

AU - Vann, Roddy G. L.

AU - Weber, Hannes

PY - 2019/3/25

Y1 - 2019/3/25

N2 - 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.

AB - 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.

KW - physics.plasm-ph

U2 - 10.1051/epjconf/201920301005

DO - 10.1051/epjconf/201920301005

M3 - Article

SN - 2100-014X

VL - 203

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

IS - 01005

ER -

The deteriorating effect of plasma density fluctuations on microwave beam quality

Abstract

Bibliographical note

Keywords

Access to Document

Activities

20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating

Cite this