Bulletin of the American Physical Society
64th Annual Meeting of the APS Division of Plasma Physics
Volume 67, Number 15
Monday–Friday, October 17–21, 2022; Spokane, Washington
Session BO07: Dusty Plasmas and Multiphase Media
9:30 AM–12:30 PM,
Monday, October 17, 2022
Room: 401 ABC
Chair: Saikat Chakraborty Thakur, Auburn University
Abstract: BO07.00013 : Redistribution of Kinetic Energy in a Microgravity Complex (Dusty) Plasma*
11:54 AM–12:06 PM
Presenter:
Lori C McCabe
(Auburn University)
Authors:
Lori C McCabe
(Auburn University)
Edward Thomas
(Auburn University)
Uwe Konopka
(Auburn University)
Saikat Chakraborty Thakur
(Auburn University)
Jeremiah D Williams
(Wittenberg University)
Mikhail Pustylnik
(DLR)
Hubertus Thomas
(DLR)
Collaboration:
We acknowledge the use of the joint ESA-ROSCOSMOS Experiment «PK-4» on-board the ISS.
Data from the ISS is compared against experiments performed using a ground reference version of PK-4 and numerical simulations. Results show substantive differences in the velocity distribution functions between experiments on the ground and in microgravity. The dust cloud in microgravity gains thermal energy at the application of polarity switching. Simulation results suggest that this may be due to a modification in the plasma Debye length at the onset of polarity switching. Experimental measurements and simulations show that an extended time (much greater than the Epstein drag decay) is required to dissipate this energy back into the plasma.
*This work is supported by funding from NASA/JPL, DOE, NSF EPSCoR, and DLR/BMWi.
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