Particle acceleration by strong plasma turbulence. I - Acceleration of electrons to mildly relativistic energies

Details Particle acceleration by strong plasma turbulence. I - Acceleration of electrons to mildly relativistic energies Particle acceleration by strong plasma turbulence. I - Acceleration of electrons to mildly relativistic energies

Mar 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...212..891s&link_type=abstract

Astrophysical Journal, Part 1, vol. 212, Mar. 15, 1977, p. 891-904. Research supported by the Max-Planck-Gesellschaft and NSF.

Astronomy and Astrophysics

Astrophysics

18

Astrophysics, Electron Distribution, Particle Acceleration, Plasma Turbulence, Plasma Waves, Diffusion Coefficient, Distribution Functions, Electron Plasma, Landau Damping, Magnetohydrodynamic Stability, Plasma Spectra, Plasma-Particle Interactions

Scientific paper

The problem of converting a fairly narrow nonrelativistic electron distribution into a broad power-law distribution extending to mildly relativistic energies (500 keV) is considered. When the initial electron distribution is sufficiently unstable to produce a level of electron plasma waves which exceeds the threshold for modulational instability, also known as strong electron plasma waves turbulence, the following sequence occurs. Regions of reduced plasma density and enhanced plasma wave energy density known as cavitons are formed in the plasma. Due to the self-focusing properties of electron plasma waves, these cavitons contract, which reduces the wavelength of the plasma waves trapped in the cavitons and decreases their phase velocities. These waves then interact with and accelerate a large number of electrons from the tail of the main body of the distribution to mildly relativistic energies. The problem of the initial generation of the electron plasma wave turbulence from particle distributions with a streaming electron component or an extended electron tail is considered.

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