One of the last big unsolved problems in classical physics is turbulence - in plasmas this is further complicated by the additional interactions with electromagnetic fields. Adressing this issue with massively parallel computer simulations is one of my main research interests. As a long-term developer of the gyrokinetic (5D) plasma microturbulence code GENE, I am particularly interested in further enhancements of this numerical tool, verification of the implemented equations by comparison with analytic solutions or benchmarks with similar codes, and validation against particular measurements from experiments. Applications of the code furthermore aim at qualitative and even quantitative predictions for current experiments and future magnetic confinement based fusion devices. The latter also includes coupling to transport solvers and comparisons with lower hierarchy models. Additionally, I have also participated in projects employing Hybrid-kinetic 6D Vlasov simulations.
Academic and Employment history
2009 to 2012: Post-Doc positions through the European EFDA GOTiT (Goal Oriented Training in Theory) programme and the Max Planck Institute for Plasma Physics, Germany; visiting researcher at the Princeton Plasma Physics Laboratory, USA (04-06/2012)
Since 07/2016: Chairman (2016-2018) or Vice-Chairman (2018-) of the Wissenschaftlerrat (Scientists' Representative Council) of the Max Planck Institute for Plasma Physics; Member of the Wissenschaftlich Technische Rats-Versammlung (committee of scientific-technical councils) of the Helmholtz Association
Conference programme committee member - 21st Joint EU-US Transport Task Force Meeting, Sept 5-8, 2016, Leysin, Switzerland
Reviewer for Nuclear Fusion, Physics of Plasmas, Computer Physics Communications, Plasma Physics and Controlled Fusion, Journal of Plasma Physics, HLRS Stuttgart (Germany), IFERC-CSC (Japan), EUROfusion HPC (Marconi-Fusion, Italy).
- Most cited - see https://orcid.org/0000-0002-0851-6699 for a full list of publications
The global version of the gyrokinetic turbulence code GENE, Journal of Computational Physics 230, 7053 (2011)
Clarifications to the limitations of the s-alpha equilibrium model for gyrokinetic computations of turbulence, Physics of Plasmas 16, 032308 (2009)
Scale separation between electron and ion thermal transport, Physical Review Letters 100, 185002 (2008)
System Size Effects on Gyrokinetic Turbulence, Physical Review Letters 105, 155001 (2010)
Nonlinear gyrokinetic simulations of ion-temperature-gradient turbulence for the optimized Wendelstein 7-X stellarator, Physical Review Letters 99, 035002 (2007)
Grant for Bavarian-French research collaborations (2017)
- PI or Co-PI on multiple competetive supercomputer allocations worldwide:
Lighthouse project and various compute time awards, EUROfusion HPC, Marconi-Fusion, Italy (2016–)
Various compute time awards, IFERC-CSC, Japan, (2012–2016)
Various compute time awards, HPC-FF, Germany (2010–2013)
Comprehensive ab initio simulations of turbulence in ITER-relevant fusion plasmas, PRACE Award (4th call) (2012–2013)
Ab initio Simulations of Turbulence in Fusion Plasmas, PRACE Award (Early Access) (2010)
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