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 PP11: Poster Session VI: Relativistic Laser Plasma Interaction and Beam Physics; Boundary; MHD and Stability, Transients; FRC; Dusty Plasmas; Basic Studies; Computational and Diagnostic Methods (2:00pm-5:00pm)
Wednesday, November 7, 2018
OCC Room: Exhibit Hall A1&A
Abstract ID: BAPS.2018.DPP.PP11.107
Abstract: PP11.00107 : Measuring the particle charge in the bulk of a complex plasma*
Edward E Thomas
Brandon D Doyle
Jeremiah D Williams
A complex plasma consists beside electrons, ions and neutrals also of a more massive, often purposely introduced component, the charged dust (nano-/micro-particles). Its acquired charge is a result of the dust—plasma interaction. Due to the relative high dust particle mass, the dynamics of the combined (complex) plasma system, is governed by the dust inertia. This allows to study the complex plasma at the level of the motion and positions of the individual dust particles. A major factor also plays the dust charge. It is often estimated theoretically using orbit motion limited (OML) or similar theories that rely on a background plasma model as well as several crucial assumptions. Experimental determination of the charge is difficult and thus rare, especially for particles in the bulk plasma. In this paper we will discuss an approach to determine an effective dust particle charge in the discharge bulk by analyzing the individual particle motion. We will utilize a free-fall experiment facility for complex plasma, such as the international space station experiment PK-4, to get access to particle motion in the bulk of the discharge.
*This work was supported by the JPL/NASA (JPL-RSA 1571699), the US Dept. of Energy (DE-SC0016330), the NSF (PHY-1613087) and by DLR/BMWi (FKZ 50WM1441).
To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2018.DPP.PP11.107
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