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Measurements of dipole moments and a Q-patch model of collisionally charged grains

Identical glass spheres of 434±17μm diameter are charged in collisions among each other. Atslow speed some form dimers under microgravity and oscillate within the electrical field of acapacitor. The dipole moments deduced from these oscillations are large. They cannot beexplained by the net charges measured for each grain (up to±3×105e) and show no significantdependence on the net charge in the given range. This requires a highly non-homogeneous chargedistribution on the grain surface. We simulate heterogeneous charging with a Q-patch chargingmodel in agreement to the experimental data.

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Date Issued:
10.09.2020
DOI:
10.1088/1367-2630/abae43
URN:
urn:nbn:de:hbz:464-20210119-171809-0
Language:
English
Type of Resource:
Text
Keywords:
electrical dipole moment; static charge; triboelectric effect; experimental measurements; computer simulation; Q-patchmode
Collection:
E-Publications
Subject categories of the Deutsche Nationalbibliografie:
530 Physics
Hosting institution:
Faculty of Physics
funding:

The publication of this article was supported by the Publication Fund of the University of Duisburg-Essen.

Info on primary publication:

Steinpilz, T., Jungmann, F., Joeris, K., Teiser, J., Wurm, G., 2020. Measurements of dipole moments and a Q-patch model of collisionally charged grains. New J. Phys. 22 (2020) 093025. https://doi.org/10.1088/1367-2630/abae43

Published 10 September 2020

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