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Abstract

This report concerns the interpretation and tomography of soft X-ray (SXR) data. Two codes are described: VISO and DIRO. With VISO it is possible to plot and print SXR data from different sets of channels. Features of this code are: plots of emissivity versus time, band bass filtering, coloured contour plots, 3-dimensional plots. Fast Fourier transform (FFT) calculations, profiles in time and frequency space versus channel number, plots of FFT phase versus channel angle, error profiles. Furthermore, it is possible to calculate and to correlate data of other diagnostics with the SXR data (eg the FFT frequencies of the Mirnov coils). VISO also prepares input data for the DIRO code. DIRO calculates the differential rotational tomography. The reconstructed radial mode amplitudes and the 2-dimensional emissivity image are plotted and printed. Finally, a temporal animation of emissivity contours can be created. The differential rotational tomography is an innovative tomography method, which, for the first time, is able to reconstruct the soft X-ray emissivity of coupled magnetohydrodynamic (MHD) modes. The principles of this method are described.

Additional information

Authors: SOKOLL M, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: IPP I/310 EN (1997) 49 pp.
Availability: Available from the Max-Planck-Institut für Plasmaphysik, 85748 Garching bei München (DE)
Record Number: 199711302 / Last updated on: 1997-10-10
Category: PUBLICATION
Original language: en
Available languages: en