The deteriorating effect of plasma density fluctuations on microwave beam quality

Alf Koehn; 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 Koehn^*, 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

^*Corresponding author for this work

Department of Applied Physics

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

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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.

Original language	English
Title of host publication	20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20)
Editors	E Poli, H Laqua, J Oosterbeek
Publisher	EDP Sciences
Number of pages	6
DOIs	https://doi.org/10.1051/epjconf/201920301005
Publication status	Published - 2019
MoE publication type	A4 Conference publication
Event	Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating - Greifswald, Germany Duration: 14 May 2018 → 17 May 2018 Conference number: 20

Publication series

Name	EPJ Web of Conferences
Publisher	E D P SCIENCES
Volume	203
ISSN (Print)	2100-014X

Workshop

Workshop	Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating
Abbreviated title	EC
Country/Territory	Germany
City	Greifswald
Period	14/05/2018 → 17/05/2018

Keywords

TOKAMAK
WAVES

Access to Document

10.1051/epjconf/201920301005

Köhn_The_Deteriorating.epjconf_ec2018_01005-1Final published version, 3 MB

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Koehn, 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. In E. Poli, H. Laqua, & J. Oosterbeek (Eds.), 20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20) (EPJ Web of Conferences; Vol. 203). EDP Sciences. https://doi.org/10.1051/epjconf/201920301005

@inproceedings{d87bf43956614e258b8822de41329f1b,

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 full-wave simulations is shown.",

keywords = "TOKAMAK, WAVES",

author = "Alf Koehn 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 = "| openaire: EC/H2020/633053/EU//EUROfusion ; Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, EC ; Conference date: 14-05-2018 Through 17-05-2018",

year = "2019",

doi = "10.1051/epjconf/201920301005",

language = "English",

series = "EPJ Web of Conferences",

publisher = "EDP Sciences",

editor = "E Poli and H Laqua and J Oosterbeek",

booktitle = "20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20)",

address = "France",

}

Koehn, A, Austin, ME, Brookman, MW, Gentle, KW, Guidi, L, Holzhauer, E, La Haye, RJ, Leddy, JB, Maj, O, Petty, CC, Poli, E, Snicker, A, Thomas, MB, Vann, RGL & Weber, H 2019, The deteriorating effect of plasma density fluctuations on microwave beam quality. in E Poli, H Laqua & J Oosterbeek (eds), 20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20). EPJ Web of Conferences, vol. 203, EDP Sciences, Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating, Greifswald, Germany, 14/05/2018. https://doi.org/10.1051/epjconf/201920301005

The deteriorating effect of plasma density fluctuations on microwave beam quality. / Koehn, Alf; Austin, Max E.; Brookman, Michael W. et al.
20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20). ed. / E Poli; H Laqua; J Oosterbeek. EDP Sciences, 2019. (EPJ Web of Conferences; Vol. 203).

Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review

TY - GEN

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

AU - Koehn, 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

N1 - Conference code: 20

PY - 2019

Y1 - 2019

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 - TOKAMAK

KW - WAVES

U2 - 10.1051/epjconf/201920301005

DO - 10.1051/epjconf/201920301005

M3 - Conference article in proceedings

T3 - EPJ Web of Conferences

BT - 20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20)

A2 - Poli, E

A2 - Laqua, H

A2 - Oosterbeek, J

PB - EDP Sciences

T2 - Joint Workshop on Electron Cyclotron Emission and Electron Cyclotron Resonance Heating

Y2 - 14 May 2018 through 17 May 2018

ER -

Koehn A, Austin ME, Brookman MW, Gentle KW, Guidi L, Holzhauer E et al. The deteriorating effect of plasma density fluctuations on microwave beam quality. In Poli E, Laqua H, Oosterbeek J, editors, 20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20). EDP Sciences. 2019. (EPJ Web of Conferences). doi: 10.1051/epjconf/201920301005

The deteriorating effect of plasma density fluctuations on microwave beam quality

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Publication series

Workshop

Keywords

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