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  • Construction and optimisation of a multichannel spectrometry system to measure radial profiles of pollution, drift velocities and ion temperatures in W7-AS plasmas


In this thesis the construction of a multichannel spectrometry system and its use in the ultra-violet and visible spectral sector was investigated. The system proved ready for use. It enabled measurement of 39 sight lines simultaneously and independently in rapid succession. The set of four-dimensional data (intensity, channels/sight lines, wavelength, time) can be shown by reduction. If further data processing has been effected, the line integrated temperature readings can serve to calculate radial profiles of temperature by use of tomographic processes. The chromatic lens errors can be reduced by use of achromates or spherical hollow mirrors. Also the installation of field lenses could be considered in order to regain intensity. The quality of the data could be improved, but the system can be used for measurement, even in this early phase of construction.

Additional information

Authors: ELLMAUER M, Max-Planck-Institut für Plasmaphysik, Garching bei München (DE)
Bibliographic Reference: Report: IPPIII/220 DE (1997) 72pp.
Availability: Available from the Max-Planck-Institut für Plasmaphysik, 85748 Garching bei München (DE)
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