2007 Volume 2 Pages S1074
A numerical method is described that can be used to estimate the source of neutral particles within a helical plasma column as a function of the magnetic surface. The method is applicable to the data analysis of passive line-integral diagnostics of escaping neutrals. The magnetic surface structure taken from magnetohydrodynamic equilibrium calculations defines the kernel of the integral equation. A regularized solution is obtained over a discrete grid by minimizing the appropriate objective functional. The corresponding linear system is solved in terms of least squares using QR algorithm. The application is discussed to one particular charge-exchange diagnostic on the Large Helical Device and the model profile reconstruction examples are presented.
