arXiv subjects

Anikó Zs. Kovács

Publications and source records attributed to Anikó Zs. Kovács.

2 recordsLinked to original sources

arXiv2014

Slow plastic creep of 2D dusty plasma solids

We report complex plasma experiments, assisted by numerical simulations, providing an alternative qualitative link between the macroscopic response of polycrystalline solid matter to small shearing forces and the possible underlying microscopic processes. In the stationary creep regime we have determined the exponents of the shear rate dependence of the shear stress and defect density, being $α= 1.15 \pm 0.1$ and $β= 2.4 \pm 0.4$, respectively. We show that the formation and rapid glide motion of dislocation pairs in the lattice are dominant processes.

physics.plasm-ph↗

arXiv2014

Dust as probe for horizontal field distribution in low pressure gas discharges

Using dust grains as probes in gas discharge plasma is a very promising, but at the same time very challenging method, as the individual external control of dust grains has to be solved. We propose and demonstrate the applicability of the RotoDust experiment, where the well controlled centrifugal force is balanced by the horizontal confinement field in plane electrode argon radio frequency gas discharges. We have reached a resolution of 0.1 V/cm for the electric field. This technique is used to verify numerical simulations and to map symmetry properties of the confinement in dusty plasma experiments using a glass box.

physics.plasm-ph↗