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Cosmic Ray System (CRS)

NSSDCA ID: 1977-076A-08

Mission Name: Voyager 2
Principal Investigator:Prof. Edward C. Stone, Jr.


This investigation studied the origin and acceleration process, life history, and dynamic contribution of interstellar cosmic rays, the nucleosynthesis of elements in cosmic-ray sources, the behavior of cosmic rays in the interplanetary medium, and the trapped planetary energetic particle environment. The instrumentation included a High-Energy Telescope System (HETS) and a Low-Energy Telescope System (LETS). The HETS covered an energy range between 6 and 500 MeV/nucleon for nuclei ranging in atomic numbers from 1 through 30. In addition, electrons in the energy range between 3 and 100 MeV were measured by this telescope and an electron telescope. The LETS measured the energy and determined the identity of nuclei for energies between .15 and 30 MeV/nucleon and atomic numbers from 1 to 30. The instruments also measured the anisotropies of electrons and nuclei. In addition, electrons in the energy range between 3 and 100 MeV were measured by the electron telescope.

Alternate Names

  • CRS
  • Voyager2/CRS

Facts in Brief

Mass: 7.5 kg
Power (avg): 5.4 W

Funding Agency

  • NASA-Office of Space Science (United States)


  • Astronomy: Cosmic Ray
  • Planetary Science: Fields and Particles
  • Space Physics: Heliospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Dr. Edwin V. Bell, II



NameRoleOriginal AffiliationE-mail
Dr. Frank B. McDonaldCo-InvestigatorUniversity of Maryland
Dr. James H. TrainorCo-InvestigatorNASA Goddard Space Flight Center
Dr. Alois W. SchardtCo-InvestigatorNASA Goddard Space Flight Center
Prof. William R. WebberCo-InvestigatorUniversity of New
Prof. Jack R. JokipiiCo-InvestigatorUniversity of
Prof. Edward C. Stone, Jr.Principal InvestigatorCalifornia Institute of
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