Radio Pumping of Ionospheric Plasma with Orbital Angular Momentum
2009 (English)In: Physical Review Letters, ISSN 0031-9007, Vol. 102, no 6, 065004- p.Article in journal (Refereed) Published
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.
Place, publisher, year, edition, pages
2009. Vol. 102, no 6, 065004- p.
IdentifiersURN: urn:nbn:se:uu:diva-152124DOI: 10.1103/PhysRevLett.102.065004ISI: 000263389500030OAI: oai:DiVA.org:uu-152124DiVA: diva2:412514