HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Nonlinear Doppler reflectometry power response. Analytical predictions and full--wave modelling

Abstract : The transition of Doppler reflectometry diagnostic to nonlinear regime of scattering is studied analytically with the use of the perturbation theory applied to Helmholtz equation. Density fluctuations with large radial correlation length, O-polarization of the probing beam, linear background density profile and slab geometry are considered. Formulae for onset of nonlinearity are derived for different parameter ranges. Obtained results are generalized for the arbitrary turbulence radial correlation length. The results of physical optics model are reproduced, while new formulae are obtained for different parameter ranges and their experimental relevance is demonstrated. Qualitative explanation for scattered signal nonlinear power dependence is proposed. Analytical results are validated with IPF-FD3D code full-wave numerical modelling for radially uniform and fully 2D turbulence..
Document type :
Journal articles
Complete list of metadata

Cited literature [20 references]  Display  Hide  Download

Contributor : Stéphane Heuraux Connect in order to contact the contributor
Submitted on : Thursday, January 9, 2020 - 6:46:58 PM
Last modification on : Tuesday, January 4, 2022 - 5:55:22 AM
Long-term archiving on: : Saturday, April 11, 2020 - 1:17:55 PM


Files produced by the author(s)




O Krutkin, E. Gusakov, Stéphane Heuraux, C Lechte. Nonlinear Doppler reflectometry power response. Analytical predictions and full--wave modelling. Plasma Physics and Controlled Fusion, IOP Publishing, 2019, 61 (4), pp.045010. ⟨10.1088/1361-6587/ab0236⟩. ⟨hal-02434260⟩



Record views


Files downloads