Bulletin of the American Physical Society
60th Annual Meeting of the APS Division of Plasma Physics
Volume 63, Number 11
Monday–Friday, November 5–9, 2018; Portland, Oregon
Session TP11: Poster Session VII: Basic Plasma Physics: Pure Electron Plasma, Strongly Coupled Plasmas, Self-Organization, Elementary Processes, Dusty Plasmas, Sheaths, Shocks, and Sources; Mini-conference on Nonlinear Waves and Processes in Space Plasmas - Posters; MHD and Stability, Transients (2), Runaway Electrons; NSTX-U; Spherical Tokamaks; Analytical and Computational Techniques; Diagnostics (9:30am-12:30pm)
Thursday, November 8, 2018
OCC Room: Exhibit Hall A1&A
Abstract ID: BAPS.2018.DPP.TP11.10
Abstract: TP11.00010 : Dust chain formation in microgravity complex plasma*
Lorin S Matthews
Truell W Hyde
The one-dimensional (1D) dusty chain is the simplest stable complex plasma structure that exhibits a variety of fundamental interactions and at the same time allows for easy experimental tracking and elegant theoretical modeling. We investigate string formation utilizing video data from the Plasmakristal-4 (PK-4) facility on the International Space Station. In the absence of gravity, a variety of 1D dust structures form in the bulk of the plasma, where phenomena specific to self-ordering become increasingly important. The possible mechanisms guiding such 1D self-ordering can be organized into three groups: 1) ion wake-mediated interaction (symmetric and asymmetric), 2) dust particle effects (grain polarization, temperature/charge fluctuations, and demixing), and 3) system-induced interactions (discharge striations, shear flow, and thermal gradient effects). We first present a theoretical formulation of each mechanism and then identify the system parameter space where each effect is observable under microgravity conditions. Finally, the theoretical predictions are tested against the experimental data from the PK-4 laboratory.
*This work was supported by NASA grant number 1571701 and NSF grant number 1740203.
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.TP11.10
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