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  Determination of Swarm Front Plate's Effective Cross Section From Kinetic Simulations

Lira, P. A. R., Marchand, R., Burchill, J., & Förster, M. (2019). Determination of Swarm Front Plate's Effective Cross Section From Kinetic Simulations. IEEE Transactions on Plasma Science, 47(8): 8725927, pp. 3667-3672. doi:10.1109/TPS.2019.2915216.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0004-99A3-7 Version Permalink: http://hdl.handle.net/21.11116/0000-0005-0AF4-D
Genre: Journal Article

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 Creators:
Lira, Pedro Alberto Resendiz, Author
Marchand, Richard, Author
Burchill, Johnathan, Author
Förster, Matthias1, Author
Affiliations:
1Max Planck Institute for Solar System Research, Max Planck Society, Justus-von-Liebig-Weg 3, 37077 Göttingen, DE, ou_1125546              

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 Abstract: The front plates and embedded particle sensor shells that are part of the electric field instrument (EFI) on the Swarm satellites have recently been used as planar Langmuir probes, as an additional diagnostic tool to infer environment parameters. The interpretation of measured currents in terms of the plasma density or incoming flow speed, however, requires a knowledge of the front plate effective cross section Aeff. Measurements made under various space plasma conditions have led to the conclusion that this cross section is generally larger than the known geometrical cross section Ageo. Interpretations of measurements have thus been made using fixed relative enhancements of Ageo ranging from 8% to 17%. In this paper, results from kinetic simulations are presented, from which the effective cross section can be determined over a range of plasma parameters. These are used to shed light on the physical mechanisms responsible for this enhancement and construct an empirical fit to the relative enhancement δ, where Aeff = Ageo(1 + δ), and, in turn, enable improvements in the accuracy of inferred plasma parameters.

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Language(s): eng - English
 Dates: 2019
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1109/TPS.2019.2915216
 Degree: -

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Title: IEEE Transactions on Plasma Science
Source Genre: Journal
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Publ. Info: New York, NY : IEEE
Pages: - Volume / Issue: 47 (8) Sequence Number: 8725927 Start / End Page: 3667 - 3672 Identifier: ISSN: 0093-3813
CoNE: https://pure.mpg.de/cone/journals/resource/954925463189