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Solar and Cosmic-Ray Particles

NSSDCA ID: 1972-073A-09

Mission Name: IMP-H
Principal Investigator:Dr. Frank B. McDonald

Description

The GSFC cosmic-ray experiment measured energy spectra, composition, and angular distribution of solar and galactic electrons, protons, and heavier nuclei up to Z=30. Three distinct detector systems were used. The first system consisted of a pair of solid-state telescopes that measured integral particle fluxes above 150, 350, and 700 keV and of protons above 0.05, 0.15, 0.70, 1.0, 1.2, 2.0, 2.5, 5.0, 15, and 25 MeV. Except for the .05-MeV proton mode, all counting modes had unique species identification. The second detector system was a solid-state dE/dx vs E telescope that looked perpendicular to the spin axis. This telescope measured nuclei from 1 to 16 u with energies between 4 and 20 MeV/nucleon. Counts of particles in the 0.5- to 4-MeV/nucleon range, with no charge resolution, were obtained as counts in the dE/dx, but not in the E sensor. The third detector system was a three-element CsI scintillator telescope whose axis made an angle of 39 deg with respect to the spin axis. The instrument responded to electrons between 2 and 12 MeV and nuclei from 1 to 30 u in the energy range 20 to 500 MeV/nucleon. For particles below 80 MeV, this instrument acted as a dE/dx detector. Above 80 MeV, it acted as a bidirectional triple dE/dx detector. Flux directionality information was obtained by dividing certain portions of the data from each detector system into eight angular sectors.

Alternate Names

  • IMP-H/SolarandCosmic-RayParticles
  • Solar and Cosmic Ray Particles

Discipline

  • Space Physics: Heliospheric Studies

Additional Information

Questions and comments about this experiment can be directed to: Dr. H. Kent Hills

 

Personnel

NameRoleOriginal AffiliationE-mail
Dr. Bonnard J. TeegardenOther InvestigatorNASA Goddard Space Flight Centerteegarden@tgrs.gsfc.nasa.gov
Dr. D. E. HaggeOther InvestigatorNASA Goddard Space Flight Center
Dr. Frank B. McDonaldPrincipal InvestigatorNASA Goddard Space Flight Center
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