Conditional Eddies, or Clumps, in Ion-Beam-Generated Turbulence
- 18 November 1985
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 55 (21) , 2297-2300
- https://doi.org/10.1103/physrevlett.55.2297
Abstract
Low-frequency electrostatic fluctuations are investigated experimentally in an unmagnetized plasma. The turbulence is generated by ion-ion-beam instabilities. Real-time signals are recorded and investigated statistically on a conditional basis. The formation and propagation of structures with a relatively long lifetime in terms of the average bounce period is observed. Particles bouncing in the potential well associated with these "eddies" will necessarily remain correlated for times determined by the eddy lifetime. The results thus provide evidence for clump formation in plasmas.Keywords
This publication has 13 references indexed in Scilit:
- Drift wave turbulence in low- plasmasPlasma Physics, 1983
- On relative spatial diffusion in plasma and fluid turbulences: clumps, Richardson's law and intrinsic stochasticityPlasma Physics, 1982
- Experimental observations of ion phase-space vorticesPhysics Letters A, 1981
- Conditional eddies in isotropic turbulencePhysics of Fluids, 1979
- Renormalized turbulence theory for the ion acoustic problemPhysics Reports, 1979
- Space-time structure of ion beam-plasma turbulencePhysics of Fluids, 1975
- Space Correlation in Ion-Beam—Plasma TurbulencePhysical Review Letters, 1975
- Ion Heating via Turbulent Ion Acoustic WavesPhysical Review Letters, 1972
- Theory of Phase Space Density Granulation in PlasmaPhysics of Fluids, 1972
- Numerical Simulation of Electrostatic Counterstreaming Instabilities in Ion BeamsPhysical Review Letters, 1970