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

Tutkimustuotos: LehtiartikkeliArticleScientificvertaisarvioitu

Abstrakti

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.

AlkuperäiskieliEnglanti
Artikkeli064001
JulkaisuPlasma Science and Technology
Vuosikerta22
Numero6
DOI - pysyväislinkit
TilaJulkaistu - 5 maaliskuuta 2020
OKM-julkaisutyyppiA1 Julkaistu artikkeli, soviteltu

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  • Projektit

    Turbulentti kuljetus fuusioplasmassa

    Kiviniemi, T.

    01/02/202031/12/2021

    Projekti: Academy of Finland: Other research funding

    Syklokineettinen reunaturbulenssi tokamak-plasmassa

    Kiviniemi, T., Chone, L., Iorio, R. & Systä, H.

    01/09/201831/12/2022

    Projekti: Academy of Finland: Other research funding

    Siteeraa tätä

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