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Solitary potential structures associated with ion and electron beams near 1 R-E altitude


Metadata FieldValueLanguage
dc.creatorBounds, SR
dc.creatorPfaff, Rf
dc.creatorKnowlton, SF
dc.creatorMozer, FS
dc.creatorTemerin, MA
dc.creatorKletzing, CA
dc.date.accessioned2020-06-30T20:04:52Z
dc.date.available2020-06-30T20:04:52Z
dc.date.created1999-12
dc.identifier10.1029/1999JA900284en_US
dc.identifier.urihttps://agupubs.onlinelibrary.wiley.com/doi/abs/10.1029/1999JA900284en_US
dc.identifier.urihttp://hdl.handle.net/11200/49909
dc.description.abstractSmall-scale solitary electric potential structures are commonly observed on auroral field lines with the Polar Electric Field Instrument (EFI). This study focuses on observations of solitary structures in the southern hemisphere auroral zone at altitudes between 5500 and 7500 km. Some of the potential structures are similar to those observed previously by the S3-3 and Viking satellites and are inferred to be negative potential pulses traveling upward along the auroral magnetic field lines, associated with upgoing ion beams and upward currents The velocities of these "ion" solitary potentia; structures are estimated, using spaced EFI measurements, to be distributed within solitary potential structures are estimated, using spaced EFI measurements, to be distributed within the range of similar to 75 - 300 km s(-1) In addition to these structures, a different type of solitary potential structure with opposite polarity has been observed with faster propagation velocities. These faster structures (termed "electron" solitary potential structures) are distinguishable from the slower, ion solitary structures in that their distinctive bipolar electric field signature, common to both types of solitary structure, is reversed. The ultimate distinction for the electron solitary potential structures is that they are observed on auroral field lines in conjunction with magnetically field-aligned upflowing electron beams. The electron solitary potential structures propagate up the field line in the same direction as the electron beam. An example is shown of the polarity reversal from ion to electron solitary potential structures coincident with a simultaneous shift from upgoing ion beams to upgoing electron beams.en_US
dc.formatPDFen_US
dc.publisherAMER GEOPHYSICAL UNION,en_US
dc.relation.ispartofJOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICSen_US
dc.relation.ispartofseries0148-0227en_US
dc.subjectWEAK DOUBLE-LAYERS; AURORAL ACCELERATION REGION; MAGNETOSPHERIC PLASMA; FIELD STRUCTURES; WAVES; INSTRUMENT; SATELLITE; HOLESen_US
dc.titleSolitary potential structures associated with ion and electron beams near 1 R-E altitudeen_US
dc.typeTexten_US
dc.type.genreJournal Article, Academic Journalen_US
dc.citation.volume104en_US
dc.citation.issueA12en_US
dc.citation.spage28709en_US
dc.citation.epage28717en_US
dc.description.statusPublisheden_US

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