SIGNAL ANALYSIS OF FLUCTUATIONS IN TOROIDAL FUSION PLASMAS

Spectral-based signal-processing techniques for characterizing fluctua tion data from plasma discharges in the Advanced Toroidal Facility fus ion experiment are described. The analysis process moves from wave for m display and spectral analysis of single discharges to coherence filt ering and database techniques for identifying coherent fluctuations. T hese analysis techniques are used to distill large volumes of spectral data from many signals per discharge (for many discharges) into simpl e forms suitable for comparison with the global variation of plasma pa rameters.