Accession Number:

ADA143181

Title:

A Determination of the Charge State of Energetic Magnetospheric Ions by the Observation of Drift Echoes.

Descriptive Note:

Technical rept.,

Corporate Author:

AEROSPACE CORP EL SEGUNDO CA SPACE SCIENCES LAB

Report Date:

1984-06-15

Pagination or Media Count:

23.0

Abstract:

The mean charge states of heavy ions trapped in the earths magnetosphere are important parameters for distinguishing among magnetospheric theories. No direct measurements have been made at energies greater than approximately 50 kev. A technique that uses the Eq dependence of ion drift velocity is described in this report. To illustrate the application of this technique, a drift-echo event that followed a substorm occurring at 2100-2200 UT on 25 February 1979 is discussed. In this event the charge state of helium ions was 2 and that of CNO ions was 2 and probably or 5. This result implies that the drift-echo particles were freshly injected solar-wind plasma. Author

Subject Categories:

  • Atmospheric Physics
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE