Simple expressions allowing estimation of the turbulent density perturbation from reflectometry phase root mean square (rms) measurements and accounting for the turbulence correlation length are given. A numerical procedure for precise turbulence radial profile reconstruction for different turbulence wave number spectra and both O-mode and X-mode reflectometry is proposed. It is validated using a full-wave 1D modeling of ordinary (O) mode reflectometry in the case of arbitrary density fluctuation profiles.
Density fluctuation measurements using X-mode fast sweep reflectometry on Tore Supra