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The effect of a direct current field on the microparticle charge in the plasma afterglow
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View: Figures


Image of FIG. 1.
FIG. 1.

A sketch of the PK-3 Plus setup on board the ISS (taken from Ref. 28 ). The field of view employed throughout this paper is indicated in light blue in this picture.

Image of FIG. 2.
FIG. 2.

Sequence of voltages applied during decharging.

Image of FIG. 3.
FIG. 3.

The fit (red crosses) to the measured oscillatory track of an individual particle (black diamonds). The axis are kept in pixel and frame number to avoid faults introduced by conversion prior to fitting the track. The camera recorded at 50 frames per second with a resolution of 45.05 m per pixel.

Image of FIG. 4.
FIG. 4.

Distribution of the residual particle charges when no DC field is applied during decharging. Panel (a) displays the spatial distribution across the chamber volume. The field of view covers only a half of the volume; on the right side the void can be seen. The particles are colored according to their charges. In panel (b), the overall charge distribution is displayed.

Image of FIG. 5.
FIG. 5.

Distribution of the residual particle charges when a DC field is applied during decharging (see Fig. 4 for description).

Image of FIG. 6.
FIG. 6.

The particle cloud without (left panel) and with (right panel) a DC field applied during decharging. Different charge bins are shown, in order to demonstrate a homogeneous distribution of residual charges in the former case and the presence of a significant charge gradient in the latter case. The bin depth is indicated for each graph by the color bar next to it. For each plot, only particles with charges within the indicated range are plotted.


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752b84549af89a08dbdd7fdb8b9568b5 journal.articlezxybnytfddd
Scitation: The effect of a direct current field on the microparticle charge in the plasma afterglow