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This thesis examines effects which cause a decrease in the accuracy of the plasma diagnostic with charged fusion products. The main points of interest were the broadening of spectral lines, the increase of leakage-currents and the contribution to the background spectrum. The sensitivity to light of different semiconductor-detectors was examined by using a filament with variable temperature. A X-ray tube was used to determine the influence of X-rays on the detectors. The voltage and the current of the tube were varied. The effect of gamma-rays on the detectors was measured by using two gamma-isotopes. Ion induced broadening of spectral lines for different ion energies and ion currents was measured as well. The ions were treated in an ion source, fueled with deuterium. The impact of the scattering of particles in the collimator wall and the drilling of particles through the collimator edges were examined. Different materials as well as different structured collimators were used. Energy distribution, pitch angle distribution and spatial distribution of charged fusion products in the experiment W7-X were calculated by using computer simulations. The effects above mentioned can be reduced by using gyration of fusion products and other collimator geometries.

Additional information

Bibliographic Reference: Article: IPP III/248 (1999)
Record Number: 199911494 / Last updated on: 1999-10-22
Original language: en
Available languages: en