ABSOLUTE CALIBRATION OF ECE DIAGNOSTIC: A FULL REVIEW

In this work we provide a full review of the absolute calibration of ECE quasi-optical diagnostics, such as Fourier transform spectrometers. The optimisation of the overall process of averaging the interferograms to extract a reliable calibration curve are discussed. The basic assumptions, for example the linearity of the detector and the achievability of a given signal to noise ratio, are pointed out. Finally the actual physical meaning and the "accuracy versus precision" characteristics of the calibration curve are analysed.