Current-voltage relationship in auroral current sheets
Technical Report
·
OSTI ID:6495576
The current-voltage relation within narrow auroral current sheets is examined through the use of high-resolution data from the high-altitude Dynamics Explorer 1 satellite. The north-south perpendicular electric field and the east-west magnetic field are shown for three cases in which are large amplitude, oppositely directed electric fields which are confined to a region less than 20 km wide. The magnetic-field variations are found to be proportional to the second integral of the high-altitude perpendicular electric field. It is shown that at the small-scale limit, this relationship between Delta B and E is consistent with a linear Ohm's law relationship between the current density and the parallel potential drop along the magnetic field line. This linear relationship had previously been verified for large-scale auroral formations greater than 20 km wide at the ionosphere. The evidence shown here extends our knowledge down to the scale size of discrete auroral arcs.
- Research Organization:
- Regis Coll., Weston, MA (USA). Research Center
- OSTI ID:
- 6495576
- Report Number(s):
- AD-A-178407/3/XAB; SCIENTIFIC-1
- Country of Publication:
- United States
- Language:
- English
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