title: Plasma crystal dynamics measured with a three-dimensional plenoptic camera.
abstract: Three-dimensional (3D) imaging of a single-layer plasma crystal was performed using a commercial plenoptic camera. To enhance the out-of-plane oscillations of particles in the crystal, the mode-coupling instability (MCI) was triggered in it by lowering the discharge power below a threshold. 3D coordinates of all particles in the crystal were extracted from the recorded videos. All three fundamental wave modes of the plasma crystal were calculated from these data. In the out-of-plane spectrum, only the MCI-induced hot spots (corresponding to the unstable hybrid mode) were resolved. The results are in agreement with theory and show that plenoptic cameras can be used to measure the 3D dynamics of plasma crystals.
authors.affiliation: Deutsches Zentrum für Luft- und Raumfahrt, Forschungsgruppe Komplexe Plasmen, D-82234 Weßling, Germany.
authors.forename: M
authors.initials: M
authors.lastname: Jambor
authors.affiliation: Deutsches Zentrum für Luft- und Raumfahrt, Forschungsgruppe Komplexe Plasmen, D-82234 Weßling, Germany.
authors.forename: V
authors.initials: V
authors.lastname: Nosenko
authors.affiliation: Max-Planck-Institut für extraterrestrische Physik, D-85748 Garching, Germany.
authors.forename: S K
authors.initials: SK
authors.lastname: Zhdanov
authors.affiliation: Deutsches Zentrum für Luft- und Raumfahrt, Forschungsgruppe Komplexe Plasmen, D-82234 Weßling, Germany.
authors.forename: H M
authors.initials: HM
authors.lastname: Thomas