title: Observation of nonlinear frequency-sweeping suppression with rf diffusion.
abstract: Nonlinear frequency sweeping of unstable waves in a laboratory plasma is suppressed upon application of rf fields. Frequency sweeping is driven by a population of energetic electrons trapped in a magnetic dipole field that excite drift-resonant potential fluctuations and create coherent structures in phase space. Self-consistent numerical simulation reproduces the suppression and suggests an explanation due to rf scattering of energetic electrons that destroys the phase-space structures.
authors.affiliation: Department of Applied Physics and Applied Mathematics, Columbia University, New York, New York 10027, USA. dm341@columbia.edu
authors.forename: D
authors.initials: D
authors.lastname: Maslovsky
authors.forename: B
authors.initials: B
authors.lastname: Levitt
authors.forename: M E
authors.initials: ME
authors.lastname: Mauel