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Mapping of force fields in a capacitively driven radiofrequency plasma discharge

Part of: Diagnostics of Dust in Plasmas

Published online by Cambridge University Press:  01 July 2016

Michael Dropmann ,
M. Chen ,
H. Sabo ,
R. Laufer Open the ORCID record for R. Laufer [Opens in a new window] ,
G. Herdrich ,
L. S. Matthews  and
T. W. Hyde
Michael Dropmann*
Affiliation:
Center for Astrophysics, Space Physics and Engineering Research, Baylor University, One Bear Place 97310, Waco, TX 76798-7310, USA Institute of Space Systems, University of Stuttgart, Pfaffenwaldring 29, 70569 Stuttgart, Germany
M. Chen
Affiliation:
Center for Astrophysics, Space Physics and Engineering Research, Baylor University, One Bear Place 97310, Waco, TX 76798-7310, USA
H. Sabo
Affiliation:
Center for Astrophysics, Space Physics and Engineering Research, Baylor University, One Bear Place 97310, Waco, TX 76798-7310, USA
R. Laufer
Affiliation:
Center for Astrophysics, Space Physics and Engineering Research, Baylor University, One Bear Place 97310, Waco, TX 76798-7310, USA
G. Herdrich
Affiliation:
Center for Astrophysics, Space Physics and Engineering Research, Baylor University, One Bear Place 97310, Waco, TX 76798-7310, USA Institute of Space Systems, University of Stuttgart, Pfaffenwaldring 29, 70569 Stuttgart, Germany
L. S. Matthews
Affiliation:
Center for Astrophysics, Space Physics and Engineering Research, Baylor University, One Bear Place 97310, Waco, TX 76798-7310, USA
T. W. Hyde*
Affiliation:
Center for Astrophysics, Space Physics and Engineering Research, Baylor University, One Bear Place 97310, Waco, TX 76798-7310, USA
*
†Email addresses for correspondence: [email protected], [email protected]
†Email addresses for correspondence: [email protected], [email protected]
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Abstract

In this paper a method is described that allows mapping of the forces acting on dust particles in a GEC reference cell. Monodisperse particles are dropped into the plasma environment and their trajectories are tracked using a high-speed camera system to determine local accelerations and respective forces. Collecting data from a large number of particle drops allows the identification of three-dimensional vector fields for the acting forces. The procedure is described and multiple examples in which the method has been applied are given. These examples include a simple plasma sheath, plasmas perturbed by a horizontal and vertical dipole magnet, an array of multiple magnets mimicking the fields found at a lunar swirl, and the fields inside a glass box used for particle confinement. Further applicability in other plasma environments will be discussed shortly.

Type
Research Article
Information
Journal of Plasma Physics , Volume 82 , Issue 4 , August 2016 , 615820401
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Copyright
© Cambridge University Press 2016 

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