Bremen 2017 – scientific programme

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P: Fachverband Plasmaphysik

P 17: Dusty Plasmas II

P 17.2: Fachvortrag

Wednesday, March 15, 2017, 09:00–09:25, HS 2010

Multiple Camera Diagnostics of 3D Particle Motion in Dusty Plasmas — •Michael Himpel and André Melzer — Institute of Physics, University Greifswald

Stereoscopic camera systems are a standard diagnostic tool in dusty plasmas since many years. There, a small volume of a particle-containing plasma is observed with two or more cameras under different angles. The evolving imaging hardware makes it possible to achieve continuously higher framerates and higher spatial resolutions. This leads to the possibility to observe and track dust clouds with higher particle number densities. Such stereoscopic systems have been used in laboratory experiments and on parabolic flights to study waves and vortices. In a future plasma experiment (EKoPlasma) onboard the ISS, a four-camera system is planned to be implemented. This would be one of the first three-dimensional dusty plasma diagnostics to be used under space conditions.

This contribution gives an insight into the capabilities of such multi-camera systems and a brief presentation of all neccessary steps ranging from calibration to triangulation. Preliminary measurements of clusters with more than 1000 particles are shown demonstrating that single-particle reconstruction in volume-filling dust-clouds is possible.