Three-Dimensional Velocity Diffusion in Two-Stream Turbulence
- 22 May 1978
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 40 (21), 1383-1386
- https://doi.org/10.1103/physrevlett.40.1383
Abstract
Thr turbulent state initiated by the electron-beam-ion two-stream instability is investigated. The spectrum of fluctuations is concentrated on a Cherenkov cone with a single modulus of phase velocity, azimuthally symmetric around the beam axis. The associated diffusion in velocity space occurs mainly on the surface of a double cone, complementary to the Cherenkov emission cone. This model is supported by an experiment in which the three-dimensional diffusion coeffient is measured with use of space-time correlation functions.Keywords
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