NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Solar Plasma Electrostatic Analyzer

NSSDCA ID: 1973-078A-10

Mission Name: IMP-J
Principal Investigator:Dr. John T. Gosling

Description

A hemispherical electrostatic analyzer measured the directional intensity of positive ions and electrons in the solar wind, magnetosheath, and magnetotail. Ions as heavy as oxygen were resolved when the solar wind temperature was low. Energy analysis was accomplished by charging the plates to known voltage levels and allowing them to discharge with known RC time constants. In the solar wind, positive ions from 200 eV to 5 keV (15% spacing, 3% resolution) and electrons from 5 eV to 1 keV (30% spacing, 15% resolution) were studied. In the magnetosheath, positive ions from 200 eV to 5 keV (15% spacing, 3% resolution) and from 200 eV to 20 keV (30% spacing, 15% resolution) and electrons from 5 eV to 1 keV (30% spacing, 15% resolution) were studied. In the magnetotail, positive ions from 200 eV to 20 keV (30% spacing, 15% resolution) and electrons from 5 eV to 1 keV (30% spacing, 15% resolution) and from 100 eV to 20 keV (15% resolution) were studied. For further details see W. C. Feldman et al., J. Geophys., v. 80, p. 4181, 1975. No data were obtained from this experiment past October 2001.

Alternate Names

  • IMP-J/SolarPlasmaElectrostaticAnalyzer

Funding Agency

  • Energy Resources Development Administration (United States)

Disciplines

  • Space Physics: Magnetospheric Studies
  • Space Physics: Heliospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. John R. AsbridgeOther InvestigatorLos Alamos National Laboratoryjohn.asbridge@lanl.gov
Dr. John T. GoslingPrincipal InvestigatorLos Alamos National Laboratoryjgosling@lanl.gov

Selected References

  • Feldman, W. C., et al., Solar wind electrons, J. Geophys. Res., 80, No. 31, 4181-4196, Nov. 1975.
[USA.gov] NASA Logo - nasa.gov