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Cosmic-Ray Detector

NSSDC ID: 1958-001A-01
Mission Name: Explorer 1
Principal Investigator: Prof. James A. Van Allen


An Anton 314 omnidirectional Geiger tube detector was used to measure the flux of energetic charged particles (protons E>30 MeV and electrons E>3 MeV). The detector was saturated much of the time. The experiment performed normally until March 16, 1958, at which time the batteries powering the Geiger tube circuits became exhausted. No usable data were received after that time.

Funding Agency

  • NASA-Office of Space Science (United States)


  • Space Physics: Magnetospheric Studies

Additional Information

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



NameRoleOriginal AffiliationE-mail
Prof. James A. Van AllenPrincipal InvestigatorUniversity of Iowa 
Dr. George H. LudwigOther InvestigatorNOAA Environmental Research Laboratories 
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