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Channel Electron Multipliers with Electrostatic Analyzers

NSSDCA ID: 1971-096A-01

Mission Name: S-Cubed A
Principal Investigator:Dr. Robert A. Hoffman


This experiment used cylindrical curved-plate electrostatic analyzers in conjunction with channel electron multipliers to study ion and electron directional intensities in 8 or 16 contiguous energy intervals in the energy range 800 eV to 25 keV. Under normal operation, the voltage steps were synchronized to either the half roll or full roll of the satellite. Dual detector systems were used to extend the dynamic range of the instrument. A complete set of measurements was obtained every 64 s. This period was reprogrammable. There were two electrostatic analyzers which looked along the spin axis. Both were capable of measuring ions or electrons as selected by ground command. One measured particles at 2 keV, the other at 5 keV. NSSDC has all the useful data that exist from this investigation.

Alternate Names

  • Measurement and Study of Magnetospheric Storms and Ring Currents
  • S-CubedA/ChannelElectronMultiplierswithElectrostaticAnalyzers

Facts in Brief

Mass: 1.6 kg
Power (avg): 1.4 W

Funding Agency

  • NASA-Office of Space Science Applications (United States)


  • Space Physics: Magnetospheric Studies

Additional Information

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



NameRoleOriginal AffiliationE-mail
Mr. James M. WilliamsonOther InvestigatorNASA Goddard Space Flight
Mr. Leo R. DavisOther InvestigatorNASA Goddard Space Flight Center
Dr. James H. TrainorOther InvestigatorNASA Goddard Space Flight Center
Dr. John F. ArensOther InvestigatorNASA Goddard Space Flight
Dr. David S. EvansOther InvestigatorNOAA Environmental Research
Dr. Andrei KonradiOther InvestigatorNASA Johnson Space Center
Dr. Donald J. WilliamsOther InvestigatorApplied Physics
Dr. Robert A. HoffmanPrincipal InvestigatorNASA Goddard Space Flight
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