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Proton-Electron Spectrometer

NSSDCA ID: 1965-043A-03

Mission Name: Gemini 4
Principal Investigator:Mr. James R. Marback


The proton-electron spectrometer was designed to provide a detailed description of the radiation environment encountered by the crew through the South Atlantic anomaly region and was operated only during passes through the anomaly. The main plastic scintillator acted as a detector both for electrons of energies from 0.3 to 4.5 MeV and for protons of energies from 12 to 80 MeV. Shielding was provided by an anticoincidence plastic scintillator that also served as an omnidirectional proton (more than 65 MeV) detector. A 15-channel pulse height analyzer and internal shifting techniques that provided alternate measurements of proton and electron environment every 13 sec were included. The experiment functioned as planned during operational periods throughout the flight (June 3 to 7, 1965) and provided data of sufficient quality for further use in radiation dose calculations.

Alternate Names

  • Gemini4/Proton-ElectronSpectrometer


  • 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 R. MarbackPrincipal InvestigatorLockheed Electronics
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