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Implementation of a Plenoptic Camera for Three-Dimensional Particle Detection in Plasma Crystals

Jambor, Martin (2015) Implementation of a Plenoptic Camera for Three-Dimensional Particle Detection in Plasma Crystals. Master's, Technical University of Munich (TUM).

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Abstract

For the first time, a plenoptic camera has been utilized to perform continuos capture of an extended 2D plasma crystal in order to study solid-state properties of the model system. With a commercial particle tracking software and custom-built analysis algorithms, investigations of the structure of the crystal have been undertaken, as well as dynamical studies of wave propagation within the crystal. The quality of the recomputed particle positions was shown to be sufficient for the structural analysis of the crystal and for the computation of the dispersion relations of acoustic (in-plane) phonons. However, for investigations of the out-of-plane dynamical particle behavior, the resolution of the depth coordinate was not satisfying over a wide range of experimental parameters. For large particle oscillations, in the so-called mode-coupling regime, parts of the optical dispersion relation branch could be imaged. This led to elaborate studies of mode-coupling between the longitudinal and out-of-plane modes. A strong inhomogeneity was found, confirming previous results obtained with another three-dimensional detection system. The findings gave valuable feedback about the anisotropy of mode coupling and are in accordance with theoretical discoveries that are not yet published. The plenoptic camera was proven to be an adequate detection system for plasma crystals as long as the particle oscillations are sufficiently large. Technical advances might lead to improvements in the depth resolution that would include a wider range of experimental parameters, such as stronger particle confinement. Future microgravity experiments at the DLR already consider the plenoptic camera as a possible detection system.

Item URL in elib:https://elib.dlr.de/101469/
Document Type:Thesis (Master's)
Title:Implementation of a Plenoptic Camera for Three-Dimensional Particle Detection in Plasma Crystals
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Jambor, MartinDLR Research Group Complex Plasmas, OberpfaffenhofenUNSPECIFIED
Date:5 January 2015
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Number of Pages:115
Status:Unpublished
Keywords:plenoptic camera, complex plasma, 3D particle detection
Institution:Technical University of Munich (TUM)
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Space
HGF - Program Themes:Research under Space Conditions
DLR - Research area:Raumfahrt
DLR - Program:R FR - Forschung unter Weltraumbedingungen
DLR - Research theme (Project):R - Komplexe Plasmen / Laboratory research
Location: Oberpfaffenhofen
Institutes and Institutions:Research Group Complex Plasma
Deposited By: Nosenko, Volodymyr
Deposited On:08 Jan 2016 11:35
Last Modified:08 Jan 2016 11:35

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