Physics
Scientific paper
Dec 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007agufmsm12b..06h&link_type=abstract
American Geophysical Union, Fall Meeting 2007, abstract #SM12B-06
Physics
2744 Magnetotail, 2764 Plasma Sheet, 7807 Charged Particle Motion And Acceleration
Scientific paper
We have recently developed a forward in time test particle code for calculating ion distribution functions throughout the entire current sheet. The code use a time of flight binning algorithm and normalizes the contribution of each particle to its phase space contribution in the asymptotic magnetic field region. We have bench marked the code in the asymptotic field region against our previous results and show that the characteristic ion distribution signature of nonlinear particle dynamics in a current sheet are reproduced with the new algorithm. We have also used the code to examine the ion distribution function in the central current sheet and found that the energy resonance signature is present throughout the sheet. The presence of the signature throughout the entire sheet is significant in that typically the best observational measurements come from near the field reversal whereas the majority of the theoretically constructed distribution functions are in the asymptotic field region. In addition, we are currently applying the code to look for potential signatures of new discovered resonance phenomenon in which the integral region of phase space expands and contracts as a function of energy.
Bush C. J.
Holland Daniel L.
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