Physics
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991georl..18.1063m&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 18, June 1991, p. 1063-1066. DOE-sponsored research.
Physics
21
Cometary Atmospheres, Ionization, Magnetic Flux, Neutral Atoms, Pitch (Inclination), Solar Wind Velocity, Computerized Simulation, Low Frequencies, Velocity Distribution
Scientific paper
Low frequency magnetic fluctuations generated by solar wind/cometary ion distributions cause pitch-angle scattering of cometary ions. The nature of this pitch angle scattering is examined by means of one-dimensional hybrid simulations, in which newborn ions are created at a constant rate, and for various injection angles, alpha, relative to the magnetic field. Pitch angle scattering in the quasi-perpendicular regime (alpha above 60 deg) results in a bispherical velocity distribution while in the quasi-parallel regime (alpha between 0 and 60 deg), pitch angle scattering can result in either a monospherical or bispherical distribution, depending on the injection angle and initial beam velocity.
Gary Peter S.
Gombosi Tamas I.
Miller Ronald H.
Winske Dan
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