Density profile reconstruction methods for X-mode reflectometry

Due to the high temperatures and densities in the most advanc ed fusion experiments, noninvasive diagnostics are necessary to measure the plasma de nsity. A widely employed technique for electron density is the frequency swept microwave reflec tometry, based on radar systems. This project aims to improve the reconstructed profile accur a y from the data analysis standpoint, focusing in the X mode polarization. The fast and accu rate determination of the density profile is crucial for real time monitoring. In addition, if t he density profile is more precise, the extraction of the turbulence and transport properties will be more accurate. In the data analysis standpoint, improvements can be invest gated in three fronts: firstly, the initialization of the reconstruction; secondly, the metho d used to reconstruct the profile; and thirdly, the analysis of perturbations that introduce blin d regions. The initialization is assumed accurate here and dedicated Full-Wave simulations will be p erformed to re-access the current method in use, i.e. as presented in [1, 2]. Therefore, the sco pe of this paper covers, initially, the reconstruction techniques, and after, perturbations i n the density profile that introduce blind regions.