Journal
JOURNAL OF GEOPHYSICAL RESEARCH-SPACE PHYSICS
Volume 110, Issue A8, Pages -Publisher
AMER GEOPHYSICAL UNION
DOI: 10.1029/2005JA011083
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[1] Assuming a fixed ion density, adiabatic electron motion, and quasi-neutrality, we use the stationary Vlasov equation to derive the self-consistent potential in an auroral flux tube that carries downward current. Our model predicts downward electric fields similar to 5 mV/m at an altitude near 2000 km, and around 4000 km the potential reaches similar to 2.5 kV. A weak upward electric field at high altitudes reduces the potential, and the potential difference between the ionosphere and magnetosphere is much smaller.
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