High-Resolution Study of the Relationship Between the Region 2 Birkeland Current Equatorward Boundary and Soft Electron Fluxes

dc.contributor.advisorKnudsen, David
dc.contributor.authorLiyanage, Ganegama
dc.contributor.committeememberCully, Christopher
dc.contributor.committeememberSpanswick, Emma
dc.contributor.committeememberWieser, Michael
dc.date2023-06
dc.date.accessioned2023-03-17T18:10:12Z
dc.date.available2023-03-17T18:10:12Z
dc.date.issued2023-03-15
dc.description.abstractThe nightside Region 2 (R2) Field Aligned Current (FAC) system is associated with magnetospheric dynamics occurring close to the inner magnetosphere. The current carriers for this system have been studied extensively at higher energies. In this study, we investigate the potential role of electrons in the less studied suprathermal (sub-keV) range. The Enhanced Polar Outflow Probe (e-POP) instrument suite on the CASSIOPE satellite (Swarm Echo) consists of eight plasma instruments, including the Suprathermal Electron Imager (SEI) and the magnetic field instrument (MGF). The SEI records two-dimensional energy-angle images of electron distribution for energies up to 350 eV at a rate of 100 images per second. The MGF samples the magnetic field at a sampling rate of 160 times per second with a resolution of 0.0625 nT. Even though ePOP, whose scientific focus is polar outflow, does not detect high-energy particles ($>$ 1 keV), its polar orbit is optimal for studying current carriers of FACs. We examine suprathermal electron fluxes over the region of 45-80º magnetic latitude during different geomagnetic conditions based on 25 traversals of the R2 boundary. These range from 1700-0400 MLT during which the SEI detects enhanced suprathermal electron fluxes in the 5-100 eV energy range just equatorward of the R2 boundary. Coincident with these fluxes and in a majority of cases, we see evidence of a current in the opposite direction of the R2 current, which we believe has not been reported previously.en_US
dc.identifier.citationLiyanage, G. (2023). High-resolution study of the relationship between the Region 2 Birkeland current equatorward boundary and soft electron fluxes (Master's thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca.en_US
dc.identifier.urihttp://hdl.handle.net/1880/115928
dc.language.isoengen_US
dc.publisher.facultyScienceen_US
dc.publisher.institutionUniversity of Calgaryen
dc.rightsUniversity of Calgary graduate students retain copyright ownership and moral rights for their thesis. You may use this material in any way that is permitted by the Copyright Act or through licensing that has been assigned to the document. For uses that are not allowable under copyright legislation or licensing, you are required to seek permission.en_US
dc.subjectBirkeland currentsen_US
dc.subjectField aligned currentsen_US
dc.subjectCassiope ePOPen_US
dc.subjectSwarmen_US
dc.subjectPOESen_US
dc.subjectSuprathermal electronsen_US
dc.subjectSEIen_US
dc.subject.classificationGeophysicsen_US
dc.subject.classificationRemote Sensingen_US
dc.subject.classificationPhysicsen_US
dc.titleHigh-Resolution Study of the Relationship Between the Region 2 Birkeland Current Equatorward Boundary and Soft Electron Fluxesen_US
dc.typemaster thesisen_US
thesis.degree.disciplinePhysics & Astronomyen_US
thesis.degree.grantorUniversity of Calgaryen_US
thesis.degree.nameMaster of Science (MSc)en_US
ucalgary.item.requestcopytrueen_US
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