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- W2082907957 abstract "Continuing experimental studies of beam-plasma interactions in a magnetic field have shown an assortment of nonlinear effects to be present during a well-developed instability. Observations have been made of: the vanishing of the spatial growth rate; electron cross-field diffusion in synchronism with the unstable electric field; generation of harmomics of the fundamental interaction frequency up to the seventh; similarities in the spatial behavior of all seven harmonics; and the existence of a wavenumber power spectrum whose average behavior over the domain of the harmonic peaks is proportional to k−5±0.5, in agreement with certain theories of plasma turbulence. The data suggest that the large-amplitude fundamental electric field is the driving force for the nonlinearity that generates the harmonics, and that the fundamental, and the harmonics as well, represent waves traveling with a phase velocity equal to that of the slow space-charge wave on the electron beam. An interpretation is offered in terms of an approach to stationary plasma turbulence through a linear beam-plasma interaction, followed by harmonic generation, wave-wave coupling, and ultimate broadening of the emission peaks into a continuous spectrum." @default.
- W2082907957 created "2016-06-24" @default.
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- W2082907957 date "1969-03-01" @default.
- W2082907957 modified "2023-09-27" @default.
- W2082907957 title "Nonlinear Effects and Turbulent Behavior in a Beam-Plasma Instability" @default.
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- W2082907957 doi "https://doi.org/10.1063/1.1692528" @default.
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