Accepted articles

Instruments and methods of investigation


Theory of strongly reflective microwaves in turbulent inhomogeneous plasmas and its application for description of fluctuation reflectometry in thermonuclear toroidal devices

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Ioffe Institute, ul. Polytekhnicheskaya 26, St. Petersburg, 194021, Russian Federation

Theory of strongly reflective microwaves propagation in turbulent inhomogeneous plasmas is described. The amplitude of scattered signal is calculated as in the linear scattering regime within the Born approximation, as in the nonlinear regime of scattering. The possibility of analytical description of the nonlinear backscattering is considered. Based on the results of theoretical analysis of different scattering regimes of microwaves in turbulent inhomogeneous plasmas, widely used for analysis of turbulence, we discuss the main schemes of fluctuation reflectometry in thermonuclear toroidal devices. We give the description of different methods which allow interpreting the experimental data, collected with the use of fluctuation reflectometry, and improving the locality of measurments and the fluctuations wavevector resolution.

Keywords: scattering of microwaves, fluctuation reflectometry, drift turbulence, low frequency density fluctuations, toroidal devices, thermonuclear fusion
PACS: 52.35.Hr, 52.35.Mw, 52.70.−m (all)
DOI: 10.3367/UFNe.2020.08.038813
Citation: Gusakov E Z, Popov A Yu "Theory of strongly reflective microwaves in turbulent inhomogeneous plasmas and its application for description of fluctuation reflectometry in thermonuclear toroidal devices" Phys. Usp., accepted

Received: 25th, December 2019, revised: 5th, July 2020, 11th, August 2020

Оригинал: Гусаков Е З, Попов А Ю «Теория рассеяния сильно рефрагирующих СВЧ волн в турбулентной неоднородной плазме. Приложение теории к описанию флуктуационной рефлектометрии в термоядерных установках» УФН, принята к публикации; DOI: 10.3367/UFNr.2020.08.038813

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