Frequency Increase and Damping of Nonlinear Electron Plasma Oscillations in Cylindrical Symmetry
- 5 May 1997
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 78 (18) , 3463-3466
- https://doi.org/10.1103/physrevlett.78.3463
Abstract
Radial electron plasma oscillations excited by a laser wake field are measured by frequency domain interferometry. In the nonlinear regime we observe two important effects: (i) an increase of the oscillation frequency and (ii) the damping of the oscillation in a few plasma periods. Simulations show that this last effect is related to the presence of a steep radial density gradient near the focus edge.Keywords
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