Experimental observation of nonlinear synchronization due to a single wave

A test electron beam is propagated in a specially designed traveling wave tube. It interacts with a nonresonant wave, and its energy distribution is recorded at the tube output. We report the direct experimental observation of the spatially periodic electron velocity bunching, and of a nonlinear eff...

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Bibliographic Details
Published in:Physical review letters 2005-03, Vol.94 (8), p.085003.1-085003.4, Article 085003
Main Authors: DOVEIL, F, ESCANDE, D. F, MACOR, A
Format: Article
Language:English
Subjects:
Electrostatic waves and oscillations (e.g., ion-acoustic waves)
Electrostatic waves and oscillations (eg, ion-acoustic waves)
Elementary processes in plasma
Exact sciences and technology
Nonlinear waves and nonlinear wave propagation (including parametric effects, mode coupling, ponderomotive effects, etc.)
Particle beam interactions in plasma
Particle orbits
Physics
Physics of gases, plasmas and electric discharges
Physics of plasmas and electric discharges
Plasma interactions (nonlaser)
Waves, oscillations, and instabilities in plasmas and intense beams
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Summary:A test electron beam is propagated in a specially designed traveling wave tube. It interacts with a nonresonant wave, and its energy distribution is recorded at the tube output. We report the direct experimental observation of the spatially periodic electron velocity bunching, and of a nonlinear effect on the electron velocity modulation: the synchronization of the particles with the wave responsible for Landau damping in plasma physics. The results are explained by second order perturbation theory in the wave amplitude.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.94.085003