Nontrapping arrest of Langmuir wave damping near the threshold amplitude

Abstract

Evolution of a Langmuir wave is studied numerically for finite amplitudes slightly above the threshold which separates damping from nondamping cases. Arrest of linear damping is found to be a second-order effect due to ballistic evolution of perturbations, resonant power transfer between field and particles, and organization of phase space into a positive slope for the average distribution function $f_{av}$ around the resonant wave phase speed $v_{\varphi }$. Near the threshold trapping in the wave potential does not arrest damping or saturate the subsequent growth phase.

arXiv comment5 pages, 7 figures, accepted by Phys. Rev. Lett

References in corpus (5)

• Nonequilibrium Critical Phenomena and Phase Transitions into Absorbing States
• Phase transition in the collisionless regime for wave-particle interaction
• Chaos and Statistical Mechanics in the Hamiltonian Mean Field Model
• Universal trapping scaling on the unstable manifold for a collisionless electrostatic mode
• Criticality in a Vlasov-Poisson system - a fermionic universality class

Cited by in corpus (1)

• Equilibrium statistical mechanics for single waves and wave spectra in Langmuir wave-particle interaction