Physics
Scientific paper
Jan 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989georl..16..109f&link_type=abstract
Geophysical Research Letters (ISSN 0094-8276), vol. 16, Jan. 1989, p. 109-111; Authors' Reply, p. 113-116. Research supported by
Physics
6
Earth Magnetosphere, Energetic Particles, Interplanetary Magnetic Fields, Ion Motion, Thomas-Fermi Model, Flux Quantization, Particle Acceleration, Satellite Observation
Scientific paper
A criticism is offered by Fusilier of the conclusion by Sarris and Krimigis (SK, 1988) that the failure to observe energetic ions continuously under near radial interplanetary magnetic field conditions contradicts a fundamental prediction of the Fermi mechanism for the origin of the upstream ions. It is argued that both events reported by SK fall short of critical tests of the Fermi mechanism because the magnetic turbulence required by the Fermi process is not guaranteed to be present. Sarris replies that the ad hoc limit on the local angle between the magnetic field and the shock normal imposed by Fusilier is not a relevant consideration to upstream ion activity.
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