Physics – Plasma Physics
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009georl..3604103p&link_type=abstract
Geophysical Research Letters, Volume 36, Issue 4, CiteID L04103
Physics
Plasma Physics
12
Space Plasma Physics: Particle Acceleration, Space Plasma Physics: Stochastic Phenomena (3235, 3265, 4475), Magnetospheric Physics: Magnetotail
Scientific paper
Ion beams with energies of the order of several tens of keV are frequently observed in the Earth's magnetotail. Here we consider two possible acceleration mechanisms, the cross tail electric field E y and the stochastic acceleration due to the electromagnetic fluctuations present in the magnetotail. Electromagnetic perturbations are generated by random oscillating ``clouds'' moving in the x - y plane. A test particle simulation has been performed in order to reproduce the interaction between protons and electromagnetic fluctuations and the constant dawn-dusk electric field, E y , in the magnetotail current sheet. Protons are accelerated via a stochastic Fermi-like process and, by varying the features of the electromagnetic fluctuations, the combined effect of E y and of the moving clouds can explain the typical energy range of ion observations from 20 to 100 keV, and the characteristic acceleration times of several minutes.
Greco Andrés
Perri Simona
Zimbardo Gaetano
No associations
LandOfFree
Stochastic and direct acceleration mechanisms in the Earth's magnetotail does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Stochastic and direct acceleration mechanisms in the Earth's magnetotail, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Stochastic and direct acceleration mechanisms in the Earth's magnetotail will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-917278