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Cosmic Ray System (CRS)

NSSDCA ID: 1977-084A-08

Mission Name: Voyager 1
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/nucleon were measured by this telescope and an electron telescope. The LETS measured the energy and determined the identity of nuclei for energies between 0.15 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/nucleon were measured by an electron telescope.

Alternate Names

  • CRS
  • Voyager1/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

Selected References

  • Burlaga, L. F., et al., Cosmic ray modulation and turbulent interaction regions near 11 AU, J. Geophys. Res., 90, No. A12, 12027-12039, doi:10.1029/JA090iA12p12027, Dec. 1985.
  • Schardt, A. W., and F. B. McDonald, The flux and source of energetic protons in Saturn's inner magnetosphere, J. Geophys. Res., 88, No. A11, 8923-8935, doi:10.1029/JA088iA11p08923, Nov. 1983.
  • Schardt, A. W., and C. K. Goertz, High-energy particles, in Physics of the Jovian Magnetosphere, ed. A. J. Dessler, pp. 157--196, Cambridge U. Press., Cambridge, UK, 1983.
  • Vogt, R. E., et al., Voyager 1: Energetic ions and electrons in the Jovian magnetosphere, Science, 204, No. 4396, 1003-1007, doi:10.1126/science.204.4396.1003, June 1979.
  • Stone, E. C., et al., Cosmic ray investigation for the Voyager missions: Energetic particle studies in the outer heliosphere--and beyond, Space Sci. Rev., 12, No. 3, 355-376, doi:10.1007/BF00211546, Dec. 1977.
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