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P: Fachverband Plasmaphysik

P 8: Complex Plasmas and Dusty Plasmas I

P 8.2: Fachvortrag

Dienstag, 6. März 2018, 11:00–11:25, KI 1.174

Investigation of spatial-dependent particle growth using a new imaging RCE technique — •Sebastian Groth, Franko Greiner, and Alexander Piel — Institute of Experimental and Applied Physics, Kiel University, Germany

Under certain circumstances nanometer-sized particles grown in a reactive argon-acetylene plasma form quite homogeneous monodisperse particle clouds. The size evolution of these clouds can be investigated via random point measurements using a commercial RCE or by simple spatially resolved imaging diagnostics [1]. Nevertheless there are various scenarios like sheath growth, void growth or localized growth, where an inhomogeneous size evolution of nanodust clouds is observed. To describe these phenomena in situ quantitatively as a function of space and time a new imaging diagnostic has been developed that measures all four Stokes vector components to determine spatially resolved the particles’ size and optical properties. Corresponding to the optical setup the diagnostics are named Imaging Rotating-Compensator-Ellipsometer (I-RCE). We present this newly developed diagnostics and demonstrate its advanced capabilities on different growth scenarios.
Supported by the Deutsche Forschungsgemeinschaft within the SFB-TR24, project A2.
[1] F. Greiner et al., Plasma Sources Sci. Technol. 21, 065005 (2012)