Investigation of nonlinear effects in Doppler reflectometry using full-wave synthetic diagnostics

O. L. Krutkin; A. B. Altukhov; A. D. Gurchenko; E. Z. Gusakov; S. Heuraux; M. A. Irzak; L. A. Esipov; T. P. Kiviniemi; C. Lechte; S. Leerink; P. Niskala; G. Zadvitskiy

doi:10.1088/2058-6272/ab5c28

Investigation of nonlinear effects in Doppler reflectometry using full-wave synthetic diagnostics

O. L. Krutkin, A. B. Altukhov, A. D. Gurchenko, E. Z. Gusakov, S. Heuraux, M. A. Irzak, L. A. Esipov, T. P. Kiviniemi, C. Lechte, S. Leerink, P. Niskala, G. Zadvitskiy

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Abstract

In this work, Doppler reflectometry (DR) and radial correlation DR (RCDR) nonlinear scattering effects are studied using full-wave modeling with a set of representative FT-2 tokamak turbulence as inputs. Narrowing of the RCDR correlation function and widening of the DR poloidal wavenumber spectrum are demonstrated. An effect on the dependence of the DR signal frequency shift on the probing wavenumber is found, namely, this dependence 'linearizing' in the nonlinear scattering regime. Nonlinear effects are shown to be weaker for O-mode probing than for X-mode probing, while a faster transition to nonlinear regime is demonstrated for RCDR compared to DR in both probing scenarios.

Original language	English
Article number	064001
Journal	Plasma Science and Technology
Volume	22
Issue number	6
DOIs	https://doi.org/10.1088/2058-6272/ab5c28
Publication status	Published - 5 Mar 2020
MoE publication type	A1 Journal article-refereed

Keywords

full-wave modeling
numerical modeling
reflectometry

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10.1088/2058-6272/ab5c28

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Krutkin, O. L., Altukhov, A. B., Gurchenko, A. D., Gusakov, E. Z., Heuraux, S., Irzak, M. A., Esipov, L. A., Kiviniemi, T. P., Lechte, C., Leerink, S., Niskala, P., & Zadvitskiy, G. (2020). Investigation of nonlinear effects in Doppler reflectometry using full-wave synthetic diagnostics. Plasma Science and Technology, 22(6), Article 064001. https://doi.org/10.1088/2058-6272/ab5c28

@article{738376adf5ee4af0bc6fcf9d00cd635f,

title = "Investigation of nonlinear effects in Doppler reflectometry using full-wave synthetic diagnostics",

abstract = "In this work, Doppler reflectometry (DR) and radial correlation DR (RCDR) nonlinear scattering effects are studied using full-wave modeling with a set of representative FT-2 tokamak turbulence as inputs. Narrowing of the RCDR correlation function and widening of the DR poloidal wavenumber spectrum are demonstrated. An effect on the dependence of the DR signal frequency shift on the probing wavenumber is found, namely, this dependence 'linearizing' in the nonlinear scattering regime. Nonlinear effects are shown to be weaker for O-mode probing than for X-mode probing, while a faster transition to nonlinear regime is demonstrated for RCDR compared to DR in both probing scenarios.",

keywords = "full-wave modeling, numerical modeling, reflectometry",

author = "Krutkin, {O. L.} and Altukhov, {A. B.} and Gurchenko, {A. D.} and Gusakov, {E. Z.} and S. Heuraux and Irzak, {M. A.} and Esipov, {L. A.} and Kiviniemi, {T. P.} and C. Lechte and S. Leerink and P. Niskala and G. Zadvitskiy",

note = "| openaire: EC/H2020/633053/EU//EUROfusion ",

year = "2020",

month = mar,

day = "5",

doi = "10.1088/2058-6272/ab5c28",

language = "English",

volume = "22",

journal = "Plasma Science and Technology",

issn = "1009-0630",

publisher = "Institute of Physics Publishing",

number = "6",

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TY - JOUR

T1 - Investigation of nonlinear effects in Doppler reflectometry using full-wave synthetic diagnostics

AU - Krutkin, O. L.

AU - Altukhov, A. B.

AU - Gurchenko, A. D.

AU - Gusakov, E. Z.

AU - Heuraux, S.

AU - Irzak, M. A.

AU - Esipov, L. A.

AU - Kiviniemi, T. P.

AU - Lechte, C.

AU - Leerink, S.

AU - Niskala, P.

AU - Zadvitskiy, G.

N1 - | openaire: EC/H2020/633053/EU//EUROfusion

PY - 2020/3/5

Y1 - 2020/3/5

N2 - In this work, Doppler reflectometry (DR) and radial correlation DR (RCDR) nonlinear scattering effects are studied using full-wave modeling with a set of representative FT-2 tokamak turbulence as inputs. Narrowing of the RCDR correlation function and widening of the DR poloidal wavenumber spectrum are demonstrated. An effect on the dependence of the DR signal frequency shift on the probing wavenumber is found, namely, this dependence 'linearizing' in the nonlinear scattering regime. Nonlinear effects are shown to be weaker for O-mode probing than for X-mode probing, while a faster transition to nonlinear regime is demonstrated for RCDR compared to DR in both probing scenarios.

AB - In this work, Doppler reflectometry (DR) and radial correlation DR (RCDR) nonlinear scattering effects are studied using full-wave modeling with a set of representative FT-2 tokamak turbulence as inputs. Narrowing of the RCDR correlation function and widening of the DR poloidal wavenumber spectrum are demonstrated. An effect on the dependence of the DR signal frequency shift on the probing wavenumber is found, namely, this dependence 'linearizing' in the nonlinear scattering regime. Nonlinear effects are shown to be weaker for O-mode probing than for X-mode probing, while a faster transition to nonlinear regime is demonstrated for RCDR compared to DR in both probing scenarios.

KW - full-wave modeling

KW - numerical modeling

KW - reflectometry

UR - http://www.scopus.com/inward/record.url?scp=85082302002&partnerID=8YFLogxK

U2 - 10.1088/2058-6272/ab5c28

DO - 10.1088/2058-6272/ab5c28

M3 - Article

AN - SCOPUS:85082302002

SN - 1009-0630

VL - 22

JO - Plasma Science and Technology

JF - Plasma Science and Technology

IS - 6

M1 - 064001

ER -

Investigation of nonlinear effects in Doppler reflectometry using full-wave synthetic diagnostics

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-: Turbulent transport of fusion plasmas

-: Cyclokinetic edge turbulence in tokamak plasmas

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Investigation of nonlinear effects in Doppler reflectometry using full-wave synthetic diagnostics

Abstract

Keywords

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Projects

-: Turbulent transport of fusion plasmas

-: Cyclokinetic edge turbulence in tokamak plasmas

Cite this