NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header

Gas Discharge Counters

NSSDCA ID: 1966-017A-07

Mission Name: Cosmos 111


This experiment consisted of two gas discharge counters designed to measure electron energies greater than 40 keV and proton energies above 500 keV to investigate the cosmic radiation environment. The instruments were end-window gas discharge counters located in sequence parallel to the spacecraft axis in the upper part of the cylinder. Each counter had different shielding to separate the types of cosmic radiation. The counter designed to measure hard cosmic radiation was enclosed by a 2.5 grm per square cm copper screen, allowing penetration of protons with energies greater than 50 MeV and electrons over 5 MeV. The counter designed to measure softer radiation was enclosed with the same shielding but had a window on one side of 1.2 milligrams of mica and 0.3 mg of gold per square cm and a diameter of 0.5 cm with a solid viewing angle near 2 steradian. Protons with energies over 0.5 MeV and electrons over 40 keV could penetrate the window.

Alternate Names

  • Cosmos111/GasDischargeCounters

Funding Agency

  • Unknown (U.S.S.R)


  • Planetary Science: Fields and Particles

Additional Information

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



NameRoleOriginal AffiliationE-mail
Dr. Novomir F. PisarenkoGeneral ContactRussian Academy of
[] NASA Logo -