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Journal Articles Plasma Physics and Controlled Fusion Year : 2020

A theoretical investigation of the turbulent structures tilting measurements with radial correlation Doppler reflectometry

Abstract

A new technique for measuring the tilting of the turbulent structures is studied analytically within the framework of Born approximation. Probing with O-mode, linear density profile and slab geometry are considered. Analytical expressions are derived for scattering signal and cross-correlation function of scattering signals valid for different probing frequencies. Comparison with previously used "intuitive model" is made, discrepancies pointed out and a more general expression for narrow probing beam is derived. General conclusions about the technique are made and a possible alternative is suggested. Analytical results are validated with linear numerical simulations employing reciprocity theorem, importance of poorly localized small-angle scattering is confirmed.
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Dates and versions

hal-02434240 , version 1 (09-01-2020)

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O L Krutkin, E. Gusakov, Stéphane Heuraux. A theoretical investigation of the turbulent structures tilting measurements with radial correlation Doppler reflectometry. Plasma Physics and Controlled Fusion, 2020, 62, pp.045004. ⟨10.1088/1361-6587/ab71f5⟩. ⟨hal-02434240⟩
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