Ion dynamics in magnetized plasmas [Elektronische Ressource] / vorgelegt von Albrecht Stark

Ion dynamics in magnetized plasmasInauguraldissertationzurErlangung des akademischen Grades einesdoctor rerum naturalium (Dr. rer. nat.)an der Mathematisch-Naturwissenschaftlichen Fakult¨atderErnst-Moritz-Arndt-Universita¨t Greifswaldvorgelegt vonAlbrecht Starkgeboren am 23.08.1976in HamburgGreifswald, im Marz 2006¨Dekan: Prof. Dr. K. Fesser1. Gutachter: Prof. Dr. T. Klinger2. Gutachter: Prof. Dr. T. Dudok de WitTag der Promotion: 12. Mai 2006AbstractIn magnetized plasmas the understanding of the plasma dynamics in response tomagnetic fluctuations is of particular interest. These fluctuations appear in formof linear andnonlinear wave phenomena and alsoas a change of the magnetic fieldtopology. In the context of the present thesis the influence of low-frequency elec-tromagnetic waves and topological changes of magnetic fields caused by magneticreconnection on the ion dynamics was experimentally investigated.In the linear magnetized laboratory experiment VINETA kinetic Alfv´en waveswere excited and identified via detailed measurements of the waves dispersion bymeans of magnetic fluctuation diagnostics. For the understanding of the disper-sion behavior boundary effects and the influence of collisions must be taken intoaccount. The ion velocity distribution function (IVDF) was measured with laser-induced fluorescence (LIF). The standard LIF scheme was extended to obtainphase-resolved IVDFs in case of periodic perturbations.