Physics
Scientific paper
Oct 1982
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982jgr....87.8315l&link_type=abstract
Journal of Geophysical Research, vol. 87, Oct. 1, 1982, p. 8315-8320.
Physics
6
Energetic Particles, Geomagnetic Tail, Magnetic Variations, Protons, Bursts, Neutral Sheets, Particle Acceleration, Plasma Layers
Scientific paper
The association between energetic protons (0.29-0.50 MeV) and simultaneous local fluctuations of magnetic field at 35 to 45 earth radii in the magnetotail is examined statistically with data from APL/JHU particle telescopes aboard IMP 7 and IMP 8. About four satellite years of 5.5 min averaged measurements are used in this study. In addition to confirming that the level of magnetic field fluctuations generally increases with the presence of energetic protons and their streaming anisotropy, it is found that increases in occurrence frequency of streaming of energetic protons are ordered far better by magnetic field fluctuations than by proximity to the neutral sheet. However, the presence of large magnetic field fluctuations (delta B greater than 5 nT or delta B/B greater than 50%) is neither a necessary nor a sufficient condition for the detection of large streaming in energetic protons.
Armstrong Thomas P.
Krimigis Stamatios M.
Lui Anthony Tat Yin
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