A new method for asymmetrical Abel inversion using Fourier-Bessel expansions

A new asymmetrical Abel inversion is presented for application in asymmetrical data which is obtained from plasma. diagnostics on the toroidal plasma system. Asymmetry in the system exists in the direction along chord distribution. This new method is aimed at general measuring configuration, and need not assume integration chords to be parallel (for instance, pinhole configurations). In this new method, the asymmetrical local value is expanded to Fourier-Bessel series, and Fourier terms include the information of asymmetry. The coefficients of the expansions are determined using least-squares fitting method.