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MMS Observations of Multiscale Hall Physics in the Magnetotail
Swedish Inst Space Phys, Uppsala, Sweden..
Swedish Inst Space Phys, Uppsala, Sweden..
Swedish Inst Space Phys, Uppsala, Sweden..
Swedish Inst Space Phys, Uppsala, Sweden..
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2019 (Engelska)Ingår i: Geophysical Research Letters, ISSN 0094-8276, E-ISSN 1944-8007Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

We present Magnetospheric Multiscale mission (MMS) observations of Hall physics in the magnetotail, which compared to dayside Hall physics is a relatively unexplored topic. The plasma consists of electrons, moderately cold ions (T similar to 1.5 keV) and hot ions (T similar to 20 keV). MMS can differentiate between the cold ion demagnetization region and hot ion demagnetization regions, which suggests that MMS was observing multiscale Hall physics. The observed Hall electric field is compared with a generalized Ohm's law, accounting for multiple ion populations. The cold ion population, despite its relatively high initial temperature, has a significant impact on the Hall electric field. These results show that multiscale Hall physics is relevant over a much larger temperature range than previously observed and is relevant for the whole magnetosphere as well as for other astrophysical plasma.

Ort, förlag, år, upplaga, sidor
AMER GEOPHYSICAL UNION , 2019.
Nyckelord [en]
cold ions, Hall physics, reconnection, multiscale, MMS, magnetotail
Nationell ämneskategori
Fusion, plasma och rymdfysik
Identifikatorer
URN: urn:nbn:se:kth:diva-261017DOI: 10.1029/2019GL084137ISI: 000485377500001Scopus ID: 2-s2.0-85071908165OAI: oai:DiVA.org:kth-261017DiVA, id: diva2:1356925
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QC 20191002

Tillgänglig från: 2019-10-02 Skapad: 2019-10-02 Senast uppdaterad: 2019-10-02Bibliografiskt granskad

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Vaivads, Andris

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