A5102743857- Magnetic confinement fusion research
- Laser-Plasma Interactions and Diagnostics
- Laser-induced spectroscopy and plasma
- Ionosphere and magnetosphere dynamics
- Solar and Space Plasma Dynamics
- Plasma Diagnostics and Applications
- Micro and Nano Robotics
- Advanced Materials and Mechanics
- Laser-Matter Interactions and Applications
- Pickering emulsions and particle stabilization
- Fluid Dynamics and Turbulent Flows
- Electrohydrodynamics and Fluid Dynamics
- Lattice Boltzmann Simulation Studies
- Quantum chaos and dynamical systems
- Modular Robots and Swarm Intelligence
- Astronomical Observations and Instrumentation
- Force Microscopy Techniques and Applications
- Particle Dynamics in Fluid Flows
- Space Satellite Systems and Control
- Spectroscopy and Quantum Chemical Studies
- Spectroscopy Techniques in Biomedical and Chemical Research
- GNSS positioning and interference
- Advanced NMR Techniques and Applications
- Nonlinear Dynamics and Pattern Formation
- Chaos control and synchronization
Max Planck Society
2018-2020
Max Planck Institute for Plasma Physics
2018-2020
University of California, Los Angeles
2016
The University of Texas at Austin
2007
University of Basel
2007
Deutsche Montan Technologie (Germany)
1984-2000
MAN (Germany)
1995
A striking feature of the collective behavior spherical microswimmers is that for sufficiently strong self-propulsion they phase-separate into a dense cluster coexisting with low-density disordered surrounding. Extending our previous work, we use squirmer as model swimmer and particle-based simulation method multi-particle collision dynamics to explore influence hydrodynamics on their phase in quasi-two-dimensional geometry. The coarsening towards phase-separated state diffusive an...
Abstract We study the effect of turbulent transport in different magnetic configurations Weldenstein 7-X stellarator. In particular, we performed direct numerical simulations with global gyrokinetic code GENE-3D, modeling behavior Ion Temperature Gradient turbulence Standard, High-Mirror and Low-Mirror W7-X. found that configuration produces more than both Standard configurations. By comparison radially local simulations, have demonstrated importance performing non-linear to predict fluxes...
We have developed a tunable source of Mie scale microdroplet aerosols that can be used for the generation energetic ions. To demonstrate this potential, terawatt Ti:Al2O3 laser focused to 2×1019 W/cm2 was irradiate heavy water (D2O) composed micron-scale droplets. Energetic deuterium ions, which were generated in laser-droplet interaction, produced deuterium-deuterium fusion with approximately 2×103 neutrons measured per joule incident energy.
In this paper we follow up on the results from our previous publication [Lobsien J, et al., Nucl.Fus., Vol 58 (2018)106013], where it was found that stellarator coil design optimization can be substantially improved by using a stochastic optimisation approach.In performance quantified lower (better) and more narrow (more robust) distributions of penalty functions at end optimisations.Here, evaluate compare various sets but seek verification deeper understanding physics replacing relatively...
This paper presents the latest results from calculations of nonlinear development instabilities in magneto-plasmadynamic (MPD) thruster flows. Linear instability analysis carried out at Institut fur Raumfahrtsysteme Universitat Stuttgart yielded three basic for stationary MPD flows: a space charge instability, an acoustic wave and electron drift instability. Nonlinear using quasi-analytical method (QAM) developed by authors not only yields these lower orders QAM hierarchy but also shows...
This thesis describes the development and application of GENE-3D, a global gyrokinetic turbulence HPC code for stellarators. The equations as well their implementation use field-aligned coordinates in non-axisymmetric geometries are discussed. GENE-3D is benchmarked validity performance. Different Wendelstein 7-X investigated influence on turbulent properties. Also machine size linear growth rates studied.
A striking feature of the collective behavior spherical microswimmers is that for sufficiently strong self-propulsion they phase-separate into a dense cluster coexisting with low-density dis- ordered surrounding. Extending our previous work, we use squirmer as model swimmer and particle-based simulation method multi-particle collision dynamics to explore influence hydrodynamics on their phase in quasi-two-dimensional geometry. The coarsening towards phase-separated state diffusive an...
Satellite navigation is growing in importance for civil applications. Nowadays, there are two systems operational, GPS of the USA and GLONASS operated by Russia. In addition, augmentations these future new planned, order to increase reliability accuracy satellite systems. benefit from improvements a need advanced receiver developments which able enhance performance needed many For example, landmobile area reception signal will be strongly influenced environmental conditions whilst high...
Using high energy nanosecond and femtosecond lasers, we have studied the hydrodynamics of Mach number, laser-driven radiative blast waves. These waves can be used to study various astrophysically relevant hydrodynamic phenomena instabilities.
Using high energy nanosecond and femtosecond lasers, we have studied the hydrodynamics of Mach number, laser-driven radiative blast waves. These waves can be used to study various astrophysically relevant hydrodynamic phenomena instabilities.