A5093510636- Plasma Diagnostics and Applications
- Dust and Plasma Wave Phenomena
- Ionosphere and magnetosphere dynamics
- Laser-induced spectroscopy and plasma
- Vacuum and Plasma Arcs
- Metal and Thin Film Mechanics
Kiel University
2023-2025
Fachhochschule Kiel
2023-2025
Using a relative measurement approach, the sticking coefficients of dielectric materials commonly used in “dust plasma” studies—specifically silica (SiO2), melamine formaldehyde (MF, [C4H8N6O]n), and polymethyl methacrylate (PMMA, [C5O2H8]n)—were estimated. These results offer important insights for interpreting experiments involving various or their combinations, enabling more precise comparisons experimental designs.
For spherical dust particles in dusty plasmas, the capacitor model is an easy and widely used to link charge of their floating potential. To extend plasma studies non-spherical particles, a similar relation for arbitrary particle shapes needed. The geometry can be reduced by relating that equivalent particle. Such radius determined experimentally using simulations microsphere aggregates under laboratory conditions. results are compared electrostatic capacitance, as well two approximative...
In any physical system where a surface is hit by electrons, the sticking probability s of electrons central parameter governing, for example, charging surface. For dielectrics, it could previously only be measured high energies (>100 eV), while well-known metals even at few eV. Recent theoretical investigations concerning dielectrics such as silica predict values significantly below 1. With precision charge measurements on microparticles in sheath low-pressure plasma, difference between and...
The charge-to-mass ratio of microparticles confined in the sheath an RF plasma is key parameter for understanding and theoretical description dusty plasmas. Standard techniques, like resonance method (RM) phase-resolved (PRRM) based upon harmonic oscillator model microparticle, are used to determine ratio. However, if high precision required, these methods become relatively slow. In this work, we present two transient response-based methods, step excited oscillation method, adapted modified...