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dc.contributor.authorBuschmann, Lisa Marie
dc.contributor.authorBonnell, John W.
dc.contributor.authorBounds, Scott
dc.contributor.authorClausen, Lasse
dc.contributor.authorKletzing, Craig
dc.contributor.authorMarholm, Sigvald
dc.contributor.authorMiloch, Wojciech Jacek
dc.contributor.authorRoglans, Roger
dc.contributor.authorSpicher, Andres
dc.date.accessioned2023-06-27T07:04:48Z
dc.date.available2023-06-27T07:04:48Z
dc.date.issued2023-06-02
dc.description.abstractThe plasma in the cusp ionosphere is subject to particle precipitation, which is important for the development of large-scale irregularities in the plasma density. These irregularities can be broken down into smaller scales which have been linked to strong scintillations in the Global Navigation Satellite System (GNSS) signals. We present power spectra for the plasma density irregularities in the cusp ionosphere for regions with and without auroral particle precipitation based on in-situ measurements from the Twin Rockets to Investigate Cusp Electrodynamics-2 (TRICE-2) mission, consisting of two sounding rockets flying simultaneously at different altitudes. The electron density measurements taken from the multi-needle Langmuir probe system (m-NLP) were analyzed for the whole flight duration for both rockets. Due to their high sampling rates, the probes allow for a study of plasma irregularities down to kinetic scales. A steepening of the slope in the power spectra may indicate two regimes, a frequency interval with a shallow slope, where fluid-like processes are dominating, and an interval with a steeper slope which can be addressed with kinetic theory. The steepening occurs at frequencies between 20 Hz and 100 Hz with a median similar to the oxygen gyrofrequency. Additionally, the occurrence of double slopes increases where precipitation starts and throughout the rest of the flight. In addition, strong electron density fluctuations were found in regions poleward of the cusp, thus in regions immediately after precipitation. Furthermore, by investigating the integrated power of the fluctuations within different frequency ranges, we show that at low frequencies (10–100 Hz), the power is pronounced more evenly while the rocket encounters particle precipitation, while at high frequencies (100–1000 Hz) fluctuations essentially coincide with the passing through a flow channel.en_US
dc.identifier.citationBuschmann LM, Bonnell JW, Bounds S, Clausen LBN, Kletzing C, Marholm S, Miloch WJ, Roglans R, Spicher A. The role of particle precipitation on plasma structuring at different altitudes by in-situ measurements. Journal of Space Weather and Space Climate. 2023;13en_US
dc.identifier.cristinIDFRIDAID 2157329
dc.identifier.doi10.1051/swsc/2023012
dc.identifier.issn2115-7251
dc.identifier.urihttps://hdl.handle.net/10037/29500
dc.language.isoengen_US
dc.publisherEDP Sciencesen_US
dc.relation.journalJournal of Space Weather and Space Climate
dc.relation.projectIDinfo:eu-repo/grantAgreement/EC/H2020/866357/EU/4DSpace: integrated study for space weather at high latitudes/POLAR-4DSpace/en_US
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2023 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleThe role of particle precipitation on plasma structuring at different altitudes by in-situ measurementsen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)