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2015 
Laboratory studies of nonlinear whistler wave processes in the Van Allen radiation belts Important nonlinear wavewave and waveparticle interactions that occur in the Earth\textquoterights 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\textdegree . When the pump amplitude exceeds a threshold \~5\texttimes106 times the background magnetic field, wave power at frequencies below the pump frequency is observed at wave normal angles (\~55\textdegree) . 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\texttimes107 . Tejero, E.; Crabtree, C.; Blackwell, D.; Amatucci, W.; Mithaiwala, M.; Ganguli, G.; Rudakov, L.; Published by: Physics of Plasmas Published on: 09/2015 YEAR: 2015 DOI: 10.1063/1.4928944 
2014 
Relativistic electron precipitation events driven by electromagnetic ioncyclotron waves We adopt a canonical approach to describe the stochastic motion of relativistic belt electrons and their scattering into the loss cone by nonlinear EMIC waves. The estimated rate of scattering is sufficient to account for the rate and intensity of bursty electron precipitation. This interaction is shown to result in particle scattering into the loss cone, forming \~10 s microbursts of precipitating electrons. These dynamics can account for the statistical correlations between processes of energization, pitch angle scattering, and relativistic electron precipitation events, that are manifested on large temporal scales of the order of the diffusion time \~tens of minutes. Khazanov, G.; Sibeck, D.; Tel\textquoterightnikhin, A.; Kronberg, T.; Published by: Physics of Plasmas Published on: 08/2014 YEAR: 2014 DOI: 10.1063/1.4892185 Diffusion; Electron scattering; Nonlinear waves; waveparticle interactions; Whistler waves 
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