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Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT

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Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT. / Fu, H. Y.; Scales, W. A.; Bernhardt, P. A. et al.
In: Annales Geophysicae, Vol. 33, No. 8, 11.08.2015, p. 983-990.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Fu, HY, Scales, WA, Bernhardt, PA, Briczinski, SJ, Kosch, MJ, Senior, A, Rietveld, MT, Yeoman, TK & Ruohoniemi, JM 2015, 'Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT', Annales Geophysicae, vol. 33, no. 8, pp. 983-990. https://doi.org/10.5194/angeo-33-983-2015

APA

Fu, H. Y., Scales, W. A., Bernhardt, P. A., Briczinski, S. J., Kosch, M. J., Senior, A., Rietveld, M. T., Yeoman, T. K., & Ruohoniemi, J. M. (2015). Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT. Annales Geophysicae, 33(8), 983-990. https://doi.org/10.5194/angeo-33-983-2015

Vancouver

Fu HY, Scales WA, Bernhardt PA, Briczinski SJ, Kosch MJ, Senior A et al. Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT. Annales Geophysicae. 2015 Aug 11;33(8):983-990. doi: 10.5194/angeo-33-983-2015

Author

Fu, H. Y. ; Scales, W. A. ; Bernhardt, P. A. et al. / Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT. In: Annales Geophysicae. 2015 ; Vol. 33, No. 8. pp. 983-990.

Bibtex

@article{7090037d7fcd43bbaa2110365ef8ca93,
title = "Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT",
abstract = "Observations of secondary radiation, stimulated electromagnetic emission (SEE), produced during ionospheric modification experiments using ground-based, highpower, 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.",
keywords = "Ionosphere, active experiments, particle acceleration, plasma waves and instabilities, ELECTROMAGNETIC EMISSION-SPECTRUM, ION GYROHARMONIC STRUCTURES, IONOSPHERIC PLASMA, PUMP FREQUENCIES, DOWNSHIFTED PEAK, HF, RADIATION, INSTABILITY, FEATURES, CUTLASS",
author = "Fu, {H. Y.} and Scales, {W. A.} and Bernhardt, {P. A.} and Briczinski, {S. J.} and Kosch, {M. J.} and A. Senior and Rietveld, {M. T.} and Yeoman, {T. K.} and Ruohoniemi, {J. M.}",
note = "{\textcopyright} Author(s) 2015. This work is distributed under the Creative Commons Attribution 3.0 License.",
year = "2015",
month = aug,
day = "11",
doi = "10.5194/angeo-33-983-2015",
language = "English",
volume = "33",
pages = "983--990",
journal = "Annales Geophysicae",
issn = "0992-7689",
publisher = "European Geosciences Union",
number = "8",

}

RIS

TY - JOUR

T1 - Stimulated Brillouin scattering during electron gyro-harmonic heating at EISCAT

AU - Fu, H. Y.

AU - Scales, W. A.

AU - Bernhardt, P. A.

AU - Briczinski, S. J.

AU - Kosch, M. J.

AU - Senior, A.

AU - Rietveld, M. T.

AU - Yeoman, T. K.

AU - Ruohoniemi, J. M.

N1 - © Author(s) 2015. This work is distributed under the Creative Commons Attribution 3.0 License.

PY - 2015/8/11

Y1 - 2015/8/11

N2 - Observations of secondary radiation, stimulated electromagnetic emission (SEE), produced during ionospheric modification experiments using ground-based, highpower, 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.

AB - Observations of secondary radiation, stimulated electromagnetic emission (SEE), produced during ionospheric modification experiments using ground-based, highpower, 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.

KW - Ionosphere

KW - active experiments

KW - particle acceleration

KW - plasma waves and instabilities

KW - ELECTROMAGNETIC EMISSION-SPECTRUM

KW - ION GYROHARMONIC STRUCTURES

KW - IONOSPHERIC PLASMA

KW - PUMP FREQUENCIES

KW - DOWNSHIFTED PEAK

KW - HF

KW - RADIATION

KW - INSTABILITY

KW - FEATURES

KW - CUTLASS

U2 - 10.5194/angeo-33-983-2015

DO - 10.5194/angeo-33-983-2015

M3 - Journal article

VL - 33

SP - 983

EP - 990

JO - Annales Geophysicae

JF - Annales Geophysicae

SN - 0992-7689

IS - 8

ER -