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Trapped Radiation Detector

NSSDCA ID: 1967-060A-04

Mission Name: Mariner 5
Principal Investigator:Prof. James A. Van Allen


The objectives of this experiment were (1) to determine occurrence and measure intensity and energy spectra of energetic particles in interplanetary space and their angular distribution with respect to the probe-sun line, and (2) to search for a trapped radiation belt around Venus and for charged particle effects in the magnetohydrodynamic wake of Venus. The experiment used three type 213 GM tubes and one P-N surface barrier solid state detector with the following unique thresholds: electrons (E> 40 keV) and protons (E> 500 keV) at 70 deg and 135 deg to probe-sun line, electrons (E> 80 keV) and protons (E> 900 keV) at 70 deg to probe-sun line, and protons (500 keV to 8 MeV and 900 keV to 3.5 MeV).

Alternate Names

  • Mariner5/TrappedRadiationDetector


  • Planetary Science: Fields and Particles
  • Space Physics: Heliospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Dr. David R. Williams



NameRoleOriginal AffiliationE-mail
Prof. James A. Van AllenPrincipal InvestigatorUniversity of Iowa

Selected References

  • Canvel, H., Trapped radiation detector - Mariner 5, JPL, Calif. Inst. Technol., TR 32-1197, Pasadena, CA, Nov. 1967. N68-10080.
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