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Solar Flare High-z/Low-e and Low-e Isotope

NSSDCA ID: 1972-073A-07

Mission Name: IMP-H
Principal Investigator:Dr. John A. Simpson


This experiment used two telescopes to measure the composition and energy spectra of solar (and galactic) particles above about 0.5 MeV/nucleon. The main telescope consisted of five colinear elements (three solid state, one CsI, and one Cerenkov sapphire) surrounded by a plastic anticoincidence shield. The telescope had a 60-deg full-angle acceptance cone with its axis approximately normal to the spacecraft spin axis permitting 8-sectored information on particle arrival direction. Four elements of the main telescope were pulse-height analyzed, and low- and high-gain modes could be selected by command to permit resolution of the elements H through Ni or of the electrons and the isotopes of H and He and light nuclei. A selection-priority scheme was included to permit sampling of less abundant particle species under normal and solar-flare conditions. The low-energy telescope was essentially a two-element, shielded, solid-state detector with a 70-deg full-angle acceptance cone. The first element was pulse-height analyzed, and data were recorded by sectors.

Alternate Names

  • IMP-H/SolarFlareHigh-z/Low-eandLow-eIsotope

Funding Agency

  • Unknown (United States)


  • Space Physics: Heliospheric Studies

Additional Information

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



NameRoleOriginal AffiliationE-mail
Dr. Gordon LentzGeneral ContactUniversity of Chicago
Dr. Moises Garcia-MunozOther InvestigatorUniversity of
Dr. John A. SimpsonPrincipal InvestigatorUniversity of Chicago
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