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Gamma-Ray Measurement

NSSDCA ID: 1972-014A-07

Mission Name: TD 1A
Principal Investigator:Dr. Jacques Labeyrie


An optical spark chamber with counters and a vidicon system was used to measure gamma rays in the 70- to 300-MeV energy range. The sensitive area of the detector was 200 sq cm, and the efficiency for gamma rays was 16%. All of the sky was scanned in 6 months with a sensitivity capable of detecting a flux of > 1.E-6 photons/sq cm-s.

Alternate Names

  • Measurement of Gamma-Rays in the Energy Range 70 to 300 Mev
  • S133
  • TD1A/Gamma-RayMeasurement


  • Solar Physics: Gamma Ray

Additional Information

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



NameRoleOriginal AffiliationE-mail
Dr. Jacques LabeyriePrincipal InvestigatorCentre d'Etudes Nucleaires de Saclay
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