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EXOS-D observations of upflowing ion conics with high time resolution

Journal Article · · Geophysical Research Letters (American Geophysical Union); (United States)
OSTI ID:5444675
 [1];  [2];  [3];
  1. Institute of Space and Astronautical Science, Tokyo (Japan)
  2. Kobe Univ. (Japan)
  3. Tohoku Univ. (Japan)
+ Show Author Affiliations
Upflowing ion conics with energies of up to 100 eV and its response to quickly varying electron precipitation are reported from Exos-D charged particle observation. The field aligned bulk shift of upflowing ions is well correlated to electron precipitation even with a small scale, indicating the bulk shift is caused by the acceleration of parallel electric field around the satellite. On the other hand, the anisotropy (perpendicular heating) of upflowing ions responds to the electron precipitation in a dull way. Only in the large or long-lived region of electron precipitation, the anisotropy is reduced and the ion distribution in phase space approaches the ion beam. Signature of heating at lower altitude is still found in the phase space distribution of the ion beams. The observation shows a close connection between the elevated (bimodal) conics and upward beams.
OSTI ID:
5444675
Journal Information:
Geophysical Research Letters (American Geophysical Union); (United States), Journal Name: Geophysical Research Letters (American Geophysical Union); (United States) Vol. 18:2; ISSN 0094-8276; ISSN GPRLA
Country of Publication:
United States
Language:
English

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Related Subjects

640201* -- Atmospheric Physics-- Auroral
Ionospheric
& Magetospheric Phenomena
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ACCELERATION
ANGULAR DISTRIBUTION
ANISOTROPY
CHARGED-PARTICLE PRECIPITATION
DISTRIBUTION
EARTH ATMOSPHERE
EARTH MAGNETOSPHERE
ELECTRIC FIELDS
ELECTRON PRECIPITATION
ENERGY RANGE
EV RANGE
EV RANGE 100-1000
FLUID FLOW
GAS FLOW
HEATING
ION DRIFT
IONOSPHERE
MATHEMATICAL SPACE
ORIGIN
PHASE SPACE
PLANETARY IONOSPHERES
SPACE
SPATIAL DISTRIBUTION