Stimulated Brillouin Scatter in a Magnetized Ionospheric Plasma

Journal Article · Fri Apr 23 00:00:00 EDT 2010 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.104.165004· OSTI ID:21410648

Bernhardt, P A; Selcher, C A; Lehmberg, R H ^[1]; Rodriguez, S P; Thomason, J F ^[2]; Groves, K M ^[3]; McCarrick, M J ^[4]; Frazer, G J ^[5]

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1. Plasma Physics Division, Naval Research Laboratory, Washington, D.C. 20375 (United States)
2. Radar Division, Naval Research Laboratory, Washington, D.C. 20375 (United States)
3. Air Force Research Laboratory, Hansom AFB, Massachusetts (United States)
4. BAE Systems, Washington, D.C. (United States)
5. ISR Division, DSTO, Edinburgh, South Australia (Australia)

High power electromagnetic waves transmitted from the HAARP facility in Alaska can excite low-frequency electrostatic waves by magnetized stimulated Brillouin scatter. Either an ion-acoustic wave with a frequency less than the ion cyclotron frequency (f{sub CI}) or an electrostatic ion cyclotron (EIC) wave just above f{sub CI} can be produced. The coupled equations describing the magnetized stimulated Brillouin scatter instability show that the production of both ion-acoustic and EIC waves is strongly influenced by the wave propagation relative to the background magnetic field. Experimental observations of stimulated electromagnetic emissions using the HAARP transmitter have confirmed that only ion-acoustic waves are excited for propagation along the magnetic zenith and that EIC waves can only be detected with oblique propagation angles. The ion composition can be obtained from the measured EIC frequency.

• OSTI ID: 21410648
• Journal Information: Physical Review Letters, Vol. 104, Issue 16; Other Information: DOI: 10.1103/PhysRevLett.104.165004; (c) 2010 The American Physical Society; ISSN 0031-9007
• Country of Publication: United States
• Language: English

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY
BRILLOUIN EFFECT
CYCLOTRON FREQUENCY
CYCLOTRONS
ELECTROMAGNETIC RADIATION
EQUATIONS
INSTABILITY
ION ACOUSTIC WAVES
IONOSPHERE
MAGNETIC FIELDS
PLASMA
WAVE PROPAGATION
ACCELERATORS
COHERENT SCATTERING
CYCLIC ACCELERATORS
EARTH ATMOSPHERE
ION WAVES
PLASMA WAVES
RADIATIONS
SCATTERING