For a future fusion reactor the question of the wall material is crucial. Graphite, which is used in most present day experiments will not be suited on large scales. Tungsten seems to be an alternative. In this work, investigations on the behaviour of tungsten in fusion plasmas have been carried out. Hereby a scaling for the the central tungsten concentration for a W source in the divertor was established. Parallel the detection efficiency for tungsten could be increased significantly by the modification of a Johann type spectrometer. Moreover, the divertor retention potential for tungsten could be determined, using a special tungsten source.
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For a future fusion reactor the question of the wall material is crucial. Graphite, which is used in most present day experiments will not be suited on large scales. Tungsten seems to be an alternative. In this work, investigations on the behaviour of tungsten in fusion plasmas have been carried out. Hereby a scaling for the the central tungsten concentration for a W source in the divertor was established. Parallel the detection efficiency for tungsten could be increased significantly by the mod...
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