Determination of the Quiet-Time Current Sheet Structure Using Geotail CPI Data and Nonlinear Dynamics Modeling

Details Determination of the Quiet-Time Current Sheet Structure Using Geotail CPI Data and Nonlinear Dynamics Modeling Determination of the Quiet-Time Current Sheet Structure Using Geotail CPI Data and Nonlinear Dynamics Modeling

Dec 2002

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002agufmsm72a0609h&link_type=abstract

American Geophysical Union, Fall Meeting 2002, abstract #SM72A-0609

Physics

2744 Magnetotail, 2764 Plasma Sheet, 2794 Instruments And Techniques, 3220 Nonlinear Dynamics

Scientific paper

Computer simulations of nonlinear charged particle dynamics in magnetotail-like magnetic field have pointed towards the existence of an ion distribution function signature that manifests itself as a series of peaks and valleys. The separation of the peaks has been shown to scale as the fourth root of the normalized particle energy, where the normalization in turn depends on parameters that describe the magnetic field structure, i.e. the current sheet half-thickness and the ratio of the magnetic field strength at the midplane to the asymptotic field strength. More recently, using Geotail CPI and magnetometer data, it has been shown that this signature may be used to determine the current sheet structure during quiet-times. In this paper we present the results of a parametric survey of the quiet-time (Kp<=1+) current sheet structure for XGSE between -20 RE and -50 RE as determined from the ion distribution signature and magnetic field data. In particular, we1 present data from 43 time intervals randomly distributed near the center of the current sheet that have clearly identifiable distribution signatures and well defined current sheet crossings.

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