Laboratory studies of nonlinear whistler wave processes in the Van Allen radiation belts

TitleLaboratory studies of nonlinear whistler wave processes in the Van Allen radiation belts
Publication TypeJournal Article
Year of Publication2015
AuthorsTejero, EM, Crabtree, C, Blackwell, DD, Amatucci, WE, Mithaiwala, M, Ganguli, G, Rudakov, L
JournalPhysics of Plasmas
Volume22
Issue9
Pagination091503
Date Published09/2015
ISSN1070-664X
KeywordsNonlinear waves; Van Allen Belts
AbstractImportant nonlinear wave-wave and wave-particle interactions that occur in the Earth's Van Allen radiation belts are investigated in a laboratory experiment. Predominantly electrostatic waves in the whistler branch are launched that propagate near the resonance cone with measured wave normal angle greater than 85° . When the pump amplitude exceeds a threshold ∼5×10−6 times the background magnetic field, wave power at frequencies below the pump frequency is observed at wave normal angles (∼55°) . The scattered wave has a perpendicular wavelength that is nearly an order of magnitude larger than that of the pump wave. Occasionally, the parametric decay of a lower hybrid wave into a magnetosonic wave and a whistler wave is simultaneously observed with a threshold of δB/B0∼7×10−7 .
URLhttp://scitation.aip.org/content/aip/journal/pop/22/9/10.1063/1.4928944
DOI10.1063/1.4928944
Short TitlePhys. Plasmas


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