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P: Fachverband Plasmaphysik
P 25: Poster Session- Theory and Modelling
P 25.16: Poster
Donnerstag, 3. März 2016, 16:30–19:00, Empore Lichthof
Defining and Measuring the Coupling Strength in Coulomb and Yukawa Plasmas — •Torben Ott and Michael Bonitz — Christian-Albrechts-Universität Kiel, Institut für Theoretische Physik und Astrophysik
For strongly coupled plasmas such as dusty plasmas, trapped ions, or ultracold neutral plasmas, the definition and measurement of the correlation or coupling strength is an essential question. However, when precise measurements of charge states and/or temperatures are not feasible or when the interaction between the strongly coupled species is screened, e.g., by electrons, the straightforward use of the Coulomb coupling parameter Γ=Q2/(akBT) is problematic.
In this contribution, we present two consistent and mutually compatible approaches for defining and measuring the coupling strength in Coulomb and Yukawa One-Component Plasmas based on the purely structural features of the system, thus removing the need to measure the temperature, the charge state, or the screening length of the plasma to assess its coupling state.
[1] T. Ott, M. Bonitz, Contrib. Plasma Phys. 55, 243 (2015)
[2] T. Ott, M. Bonitz, L. G. Stanton, M. S. Murillo, Phys. Plasmas 21, 113704 (2014)