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; 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, Antti Snicker, Matthew B. Thomas, Roddy G.L. Vann, Hannes Weber

Not published at VTT

Research output: Contribution to journal › Article in a proceedings journal › Scientific › 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 fullwave simulations is shown.

Original language	English
Article number	01005
Journal	EPJ Web of Conferences
Volume	203
DOIs	https://doi.org/10.1051/epjconf/201920301005
Publication status	Published - 25 Mar 2019
MoE publication type	A4 Article in a conference publication
Event	20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC 2018 - Greifswald, Germany Duration: 14 May 2018 → 17 May 2018

Funding

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 2014−2018 under grant agreement No. 633053. The views and opinions expressed herein do not necessarily reflect those of the European Commission.

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

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10.1051/epjconf/201920301005

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Köhn, A., Austin, M. E., Brookman, M. W., Gentle, K. W., Guidi, L., Holzhauer, E., La Haye, R. J., Leddy, J. B., Maj, O., Petty, C. C., Poli, E., 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, Article 01005. https://doi.org/10.1051/epjconf/201920301005

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title = "The deteriorating effect of plasma density fluctuations on microwave beam quality",

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 fullwave simulations is shown.",

author = "Alf K{\"o}hn and Austin, {Max E.} and Brookman, {Michael W.} and Gentle, {Kenneth W.} and Lorenzo Guidi and Eberhard Holzhauer and {La Haye}, {Rob J.} and Leddy, {Jarrod B.} and Omar Maj and Petty, {Craig C.} and Emanuele Poli and Antti Snicker and Thomas, {Matthew B.} and Vann, {Roddy G.L.} and Hannes Weber",

note = "Publisher Copyright: {\textcopyright} 2019 EC. All Rights Reserved.; 20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC 2018 ; Conference date: 14-05-2018 Through 17-05-2018",

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doi = "10.1051/epjconf/201920301005",

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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 - La Haye, Rob J.

AU - Leddy, Jarrod B.

AU - Maj, Omar

AU - Petty, Craig C.

AU - Poli, Emanuele

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 fullwave 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 fullwave simulations is shown.

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U2 - 10.1051/epjconf/201920301005

DO - 10.1051/epjconf/201920301005

M3 - Article in a proceedings journal

AN - SCOPUS:85184351758

SN - 2101-6275

VL - 203

JO - EPJ Web of Conferences

JF - EPJ Web of Conferences

M1 - 01005

T2 - 20th Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC 2018

Y2 - 14 May 2018 through 17 May 2018

ER -

The deteriorating effect of plasma density fluctuations on microwave beam quality

Abstract

Funding

UN SDGs

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