Fokker-Planck Velocity Diffusion Coefficient in Plasma Turbulence
Abstract
A direct method of measuring the Fokker-Planck velocity diffusion coefficient in plasma turbulence is developed. The method is consistent with, but more general than, the quasilinear approximation. The velocity variance <Δv2> is measured by integrating the space-time potential correlation function along unperturbed particle orbits. Correlation times and velocity diffusion coefficients are measured as a function of velocity in ion-beam-plasma turbulence and the experimental results are compared with the Fokker-Planck theory requirements.
- Publication:
-
Physical Review Letters
- Pub Date:
- May 1976
- DOI:
- 10.1103/PhysRevLett.36.1138
- Bibcode:
- 1976PhRvL..36.1138G
- Keywords:
-
- Diffusion Coefficient;
- Fokker-Planck Equation;
- Plasma Turbulence;
- Plasma-Particle Interactions;
- Correlation;
- Ion Beams;
- Linear Equations;
- Particle Trajectories;
- Space-Time Functions;
- Plasma Physics