Radio Pumping of Ionospheric Plasma with Orbital Angular Momentum

Details Radio Pumping of Ionospheric Plasma with Orbital Angular Momentum Radio Pumping of Ionospheric Plasma with Orbital Angular Momentum

Feb 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009phrvl.102f5004l&link_type=abstract

Physical Review Letters, vol. 102, Issue 6, id. 065004

Computer Science

Sound

8

Ionospheric Soundings, Active Experiments, Emission, Absorption, And Scattering Of Electromagnetic Radiation, Plasma Interactions, Radio, Microwave

Scientific paper

Experimental results are presented of pumping ionospheric plasma with a radio wave carrying orbital angular momentum (OAM), using the High Frequency Active Auroral Research Program (HAARP) facility in Alaska. Optical emissions from the pumped plasma turbulence exhibit the characteristic ring-shaped morphology when the pump beam carries OAM. Features of stimulated electromagnetic emissions (SEE) that are attributed to cascading Langmuir turbulence are well developed for a regular beam but are significantly weaker for a ring-shaped OAM beam in which case upper hybrid turbulence dominates the SEE.

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