The Electric Field Structure of Auroral Arcs as Determined from Barium Plasma Injection Experiments

  1. S.-I. Akasofu and
  2. J.R. Kan
  1. E. M. Wescott

Published Online: 26 MAR 2013

DOI: 10.1029/GM025p0175

Physics of Auroral Arc Formation

Physics of Auroral Arc Formation

How to Cite

Wescott, E. M. (1981) The Electric Field Structure of Auroral Arcs as Determined from Barium Plasma Injection Experiments, in Physics of Auroral Arc Formation (eds S.-I. Akasofu and J.R. Kan), American Geophysical Union, Washington, D. C.. doi: 10.1029/GM025p0175

Author Information

  1. Geophysical Institute, University of Alaska, Fairbanks, Alaska 99701

Publication History

  1. Published Online: 26 MAR 2013
  2. Published Print: 1 JAN 1981

ISBN Information

Print ISBN: 9780875900506

Online ISBN: 9781118664360

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Keywords:

  • Auroras—Addresses, essays, lectures

Summary

Barium plasma injection experiments have revealed a number of features of electric fields in and near auroral forms extending from a few hundred to many thousands of km in altitude. There is evidence for V-type potential structures over some auroras, but not in others. For some auroral arcs, large E fields are found at ionospheric altitudes outside the arc but the E field inside the arc is near zero. In a few other auroras, most recently one investigated in an experiment conducted from Poker Flat on March 22, 1980, large, rapidly fluctuating E fields were detected by barium plasma near 600 km altitude. These E fields suggest that the motion of auroral rays can be an effect of low-altitude electric fields, or that V-type potential structures may be found at low altitudes.