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dc.contributor.authorFu, Haiyang
dc.contributor.authorScales, Wayne A.
dc.contributor.authorBernhardt, Paul A.
dc.contributor.authorBriczinski, Stan J.
dc.contributor.authorKosch, Michael J.
dc.contributor.authorSenior, Andrew
dc.contributor.authorRietveld, Michael T
dc.contributor.authorYeoman, Timothy Kenneth
dc.contributor.authorRuohoniemi, J. Michael
dc.date.accessioned2016-03-07T10:28:22Z
dc.date.available2016-03-07T10:28:22Z
dc.date.issued2015-08-11
dc.description.abstractObservations of secondary radiation, stimulated electromagnetic emission (SEE), produced during ionospheric modification experiments using ground-based, high-power, high-frequency (HF) radio waves are considered. The High Frequency Active Auroral Research Program (HAARP) facility is capable of generating narrowband SEE in the form of stimulated Brillouin scatter (SBS) and stimulated ion Bernstein scatter (SIBS) in the SEE spectrum. Such narrowband SEE spectral lines have not been reported using the European Incoherent Scatter (EISCAT) heater facility before. This work reports the first EISCAT results of narrowband SEE spectra and compares them to SEE previously observed at HAARP during electron gyro-harmonic heating. An analysis of experimental SEE data shows observations of emission lines within 100 Hz of the pump frequency, interpreted as SBS, during the 2012 July EISCAT campaign. Experimental results indicate that SBS strengthens as the pump frequency approaches the third electron gyro-harmonic. Also, for different heater antenna beam angles, the CUTLASS radar backscatter induced by HF radio pumping is suppressed near electron gyro-harmonics, whereas electron temperature enhancement weakens as measured by EISCAT/UHF radar. The main features of these new narrowband EISCAT observations are generally consistent with previous SBS measurements at HAARP.en_US
dc.descriptionPublished version. Source at <a href=http://doi.org/10.5194/angeo-33-983-2015>http://doi.org/10.5194/angeo-33-983-2015</a>.en_US
dc.identifier.citationAnnales Geophysicae 2015, 33(8):983-990en_US
dc.identifier.cristinIDFRIDAID 1278147
dc.identifier.doi10.5194/angeo-33-983-2015
dc.identifier.issn0992-7689
dc.identifier.urihttps://hdl.handle.net/10037/8722
dc.identifier.urnURN:NBN:no-uit_munin_8292
dc.language.isoengen_US
dc.publisherCopernicus Publicationsen_US
dc.rights.accessRightsopenAccess
dc.subjectIonosphereen_US
dc.subjectactive experimentsen_US
dc.subjectparticle accelerationen_US
dc.subjectplasma waves and instabilitiesen_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Fysikk: 430::Rom- og plasmafysikk: 437en_US
dc.subjectVDP::Mathematics and natural science: 400::Physics: 430::Space and plasma physics: 437en_US
dc.titleStimulated Brillouin scattering during electron gyro-harmonic heating at EISCATen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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