Wave-Particle Interactions in Electron Acoustic Waves in Pure Ion Plasmas

Journal Article · Fri Mar 06 04:00:00 EST 2009 · Physical Review Letters

DOI:https://doi.org/10.1103/PHYSREVLETT.102.095001· OSTI ID:21180264

Anderegg, F; Driscoll, C F; Dubin, D H. E.; O'Neil, T M ^[1]

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1. Department of Physics, University of California at San Diego, La Jolla, California 92093 (United States)

Electron acoustic waves (EAW) with a phase velocity less than twice the plasma thermal velocity are observed on pure ion plasma columns. At low excitation amplitudes, the EAW frequencies agree with theory, but at moderate excitation the EAW is more frequency variable than typical Langmuir waves, and at large excitations resonance is observed over a broad range. Laser induced fluorescence measurements of the wave-coherent ion velocity distribution show phase reversals and wave-particle trapping plateaus at {+-}v{sub ph}, as expected, and corroborate the unusual role of kinetic pressure in the EAW.

• OSTI ID: 21180264
• Journal Information: Physical Review Letters, Journal Name: Physical Review Letters Journal Issue: 9 Vol. 102; ISSN 0031-9007; ISSN PRLTAO
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRON PLASMA WAVES
EXCITATION
FLUORESCENCE
ION PLASMA WAVES
LASERS
PARTICLE INTERACTIONS
PHASE VELOCITY
PLASMA
RESONANCE
TRAPPING