Bremen 2017 – wissenschaftliches Programm

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P: Fachverband Plasmaphysik

P 7: Complex and Dusty Plasmas

P 7.11: Poster

Montag, 13. März 2017, 16:30–18:30, HS Foyer

The influence of pressure for the state of aggregation in complex plasmas — •Benjamin Steinmüller, Christopher Dietz, Michael Kretschmer, and Markus Thoma — I. Physikalisches Institut, JLU Gießen

The influence of neutral gas pressure for crystallization of extended three dimensional complex plasmas is investigated. The experiments are performed in a cylindrical parallel-plate radio frequency chamber under gravity conditions. To quantify the crystallization a new analysis method is proposed. This method is an extension of the scalar product of the local bond order parameter with the benefits from Minkowski structure metric. Both methods display the same behavior: At low pressure the complex plasma is in the solid state, while at high pressure it is in the liquid state. Former ground based experiments exhibited the opposite behavior.