Superiority of Bessel function over Zernicke polynomial as base function for radial expansion in tomographic reconstruction

摘要

Here we describe the superiority of Bessel function as base function for radial expansion over Zernicke polynomial in the tomographic reconstruction technique. The causes for the superiority have been described in detail. The superiority has been shown both with simulated data for Kadomtsev’s model for saw-tooth oscillation and real experimental x-ray data from W7-AS Stellarator. Keywords Soft x-ray tomography - tokamak - Kadomtsev’s model - MHD mode PACS Nos 87.59.Fm - 52.55.Tn - 52.55.Fa - 52.70.La