On ion gyro-harmonic structuring in the stimulated electromagnetic emission spectrum during second electron gyro-harmonic heating

Simple item page
dc.contributorVirginia Techen
dc.contributor.authorSamimi, A.en
dc.contributor.authorScales, Wayne A.en
dc.contributor.authorBernhardt, P. A.en
dc.contributor.authorBriczinski, S. J.en
dc.contributor.authorSelcher, C. A.en
dc.contributor.authorMcCarrick, M. J.en
dc.contributor.departmentElectrical and Computer Engineeringen
dc.date.accessed2014-06-09en
dc.date.accessioned2014-06-09T19:08:55Zen
dc.date.available2014-06-09T19:08:55Zen
dc.date.issued2012en
dc.description.abstractRecent observations show that, during ionospheric heating experiments at frequencies near the second electron gyro-harmonic, discrete spectral lines separated by harmonics of the ion-gyro frequency appear in the stimulated electromagnetic emission (SEE) spectrum within 1 kHz of the pump frequency. In addition to the ion gyro-harmonic structures, on occasion, a broadband downshifted emission is observed simultaneously with these spectral lines. Parametric decay of the pump field into upper hybrid/electron Bernstein (UH/EB) and low-frequency ion Bernstein (IB) and oblique ion acoustic (IA) modes is considered responsible for generation of these spectral features. Guided by predictions of an analytical model, a two-dimensional particle-in-cell (PIC) computational model is employed to study the nonlinear processes during such heating experiments. The critical parameters that affect the spectrum, such as whether discrete gyroharmonic on broadband structures is observed, include angle of the pump field relative to the background magnetic field, pump field strength, and proximity of the pump frequency to the gyro-harmonic. Significant electron heating along the magnetic field is observed in the parameter regimes considered.en
dc.description.sponsorshipNational Science Foundationen
dc.description.sponsorshipNRL 6.1 base programen
dc.description.sponsorshipNRC postdoc programen
dc.format.mimetypeapplication/pdfen
dc.identifier.citationSamimi, A., Scales, W. A., Bernhardt, P. A., Briczinski, S. J., Selcher, C. A., and McCarrick, M. J.: On ion gyro-harmonic structuring in the stimulated electromagnetic emission spectrum during second electron gyro-harmonic heating, Ann. Geophys., 30, 1587-1594, doi:10.5194/angeo-30-1587-2012, 2012.en
dc.identifier.doihttps://doi.org/10.5194/angeo-30-1587-2012en
dc.identifier.issn0992-7689en
dc.identifier.urihttp://hdl.handle.net/10919/48604en
dc.identifier.urlhttp://www.ann-geophys.net/30/1587/2012/angeo-30-1587-2012.htmlen
dc.language.isoenen
dc.publisherCopernicus Publicationsen
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subjectIonosphereen
dc.subjectActive experimentsen
dc.subjectPlasma waves and instabilitiesen
dc.subjectDownshifted peaken
dc.subjectUpper hybriden
dc.subjectIonosphereen
dc.subjectFrequencyen
dc.subjectInstabilityen
dc.subjectWavesen
dc.subjectAstronomy & astrophysicsen
dc.subjectGeosciences, multidisciplinaryen
dc.subjectMeteorologyen
dc.subjectAtmospheric sciencesen
dc.titleOn ion gyro-harmonic structuring in the stimulated electromagnetic emission spectrum during second electron gyro-harmonic heatingen
dc.title.serialAnnales Geophysicaeen
dc.typeArticleen
dc.type.dcmitypeTexten

Files

Original bundle
Now showing 1 - 1 of 1
Thumbnail Image
Name:
angeo-30-1587-2012.pdf
Size:
1.11 MB
Format:
Adobe Portable Document Format
Description:
Main article
Download

Collections

Scholarly Works, Electrical and Computer Engineering