To achieve optimum fusion performance, fusion reactors need to control the build up of impurities in the plasma core. In this thesis, a novel method of studying the boron transport at the ASDEX Upgrade tokamak has been developed. This method utilizes the fact that a modulation of the power from the ion cyclotron resonance heating antennas induces a modulation of the boron density, which is measured with the charge exchange recombination spectroscopy. This method enables, for the first time, high quality measurements of the boron transport coefficients, allowing a characterization of the boron transport as well as an in-depth comparison to theory.
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To achieve optimum fusion performance, fusion reactors need to control the build up of impurities in the plasma core. In this thesis, a novel method of studying the boron transport at the ASDEX Upgrade tokamak has been developed. This method utilizes the fact that a modulation of the power from the ion cyclotron resonance heating antennas induces a modulation of the boron density, which is measured with the charge exchange recombination spectroscopy. This method enables, for the first time, high...
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