Abstract
The superior performance of diverted and elongated plasmas in tokamaks motivates improvements of inversion techniques for chord integrated data (from interferometry, spectroscopy, bolometry, etc.) from such noncircular plasmas. We present a technique planned for TEXT-U. First, flux-surface contours are calculated using EFIT or a filament code. A computer subroutine is provided which then computes, for a given chord, the length of the chord segment enclosed within the flux surface ψ, as a function of ψ from the tangent surface ψtan outward. Using the length functions, the inversions may be performed using the technique of Park or by least-squares fitting. Inversions of FIR interferometer data are presented.
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