Gyrokinetic simulation of multimode plasma turbulence [Elektronische Ressource] / vorgelegt von Florian Merz

PlasmaphysikDissertationsthemaGYROKINETIC SIMULATIONOFMULTIMODE PLASMA TURBULENCEInaugural-Dissertationzur Erlangung des Doktorgradesder Naturwissenschaften im Fachbereich Physikder Mathematisch-Naturwissenschaftlichen Fakult tder Westf lischen Wilhelms-Universit t M nstervorgelegt vonFlorian Merzaus Rottweil2008Dekan: Prof. Dr. Johannes WesselsErster Gutachter: Prof. Dr. Frank JenkoZweiter Gutachter: Prof. Dr. Rudolf FriedrichTag der m ndlichen Pr fung: 12.11.2008Tag der Promotion: 06.02.2009AbstractAnomalous transport in magnetically con ned fusion plasmas is one of the principal obstacleson the way towards power plants based on fusion energy. It is induced by turbulence on scalesthat are comparable to the gyroradius of the charged plasma particles, and leads to a degrada-tion of con nement, which makes it very dif cult to reach the conditions that are necessary fora self-sustained fusion reaction in the plasma. An important goal of fusion research is there-fore to identify and understand the processes that determine the level of anomalous transport,allowing for a prediction or even reduction of this nonlinear effect.In the present thesis, a numerical approach to plasma microturbulence is pursued. Thegyrokinetic equations, which describe magnetized plasmas at fusion relevant conditions, arepresented in a form that is suitable for a numerical treatment.