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Primary Cosmic Ray Electrons

NSSDCA ID: 1968-041A-04

Mission Name: ESRO 2
Principal Investigator:Prof. Philip L. Marsden


This experiment was designed to measure flux and energy distribution of primary cosmic ray electrons in the 1- to 5-GeV range. Such data are relevant to theories of the origin and acceleration of cosmic-ray particles and for estimation of the galactic magnetic field strength. The experiment used a gas Cerenkov counter and cascade multiplication in a lead absorber to distingiush electrons from protons. It also measured the flux of protons .gt. 300 MeV and .gt. 20 GeV. The experiment had operated perfectly since launch (as of March 1969). The spacecraft decayed from orbit on May 8, 1971.

Alternate Names

  • ESRO2/PrimaryCosmicRayElectrons
  • S29


    Additional Information

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



    NameRoleOriginal AffiliationE-mail
    Dr. R. JakewayOther InvestigatorUniversity of Leeds
    Dr. J. G. WilsonOther InvestigatorUniversity of Leeds
    Prof. Philip L. MarsdenPrincipal InvestigatorUniversity of Leeds
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