Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1974
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1974apj...194..465j&link_type=abstract
Astrophysical Journal, vol. 194, Dec. 1, 1974, pt. 1, p. 465-469. Research supported by the Alfred P. Sloan Foundation;
Astronomy and Astrophysics
Astrophysics
3
Charged Particles, Cosmic Rays, Fokker-Planck Equation, Magnetic Fields, Particle Interactions, Scattering, Cyclotron Radiation, Incident Radiation, Magnetic Rigidity, Magnetic Variations, Particle Trajectories, Pitch (Inclination)
Scientific paper
A calculation is presented in terms of the pitch angle that determines the conditions under which a Fokker-Planck equation gives a reasonable approximation of the pitch-angle scattering of low rigidity particles to first order in a random magnetic field. The formulation shows that the correlation scale of the fluctuation of the magnetic field about its mean does not enter directly into the approximation. The calculation is carried out for transverse magnetic fluctuations for which the magnetic field magnitude is constant to the order considered.
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