NSSDCA ID: 1964-060A-03
Mission Name: IMP-BA charged-particle, solid-state telescope was used to measure range and energy loss of galactic and solar cosmic rays. The experiment was designed to study particle energies (energy per nucleon intervals approximately proportional to Z squared/A, for protons 0.9 to 190 MeV, 6.5 to 19 MeV, 19 to 90 MeV, and 90 to 190 MeV) and charge spectra (Z<=6). The detector was oriented normal to the spacecraft spin axis. The detector accumulators for each energy interval were telemetered six times every 5.46 min. Each accumulation period was about 40 s long (initial spacecraft spin period was about 4.1 s). The output from two 128-channel, pulse-height analyzers was obtained for one incident particle every 41 s and read out along with the detector accumulations. Useful data were obtained from launch until April 9, 1965. Data coverage was intermittent throughout the life of the spacecraft due to frequent spacecraft shutoffs and sporadic failure of some detectors. For more details, see Fan et al., J. Geophys. Res., v. 70, p. 3515, 1965, or G. Gloeckler, J. Geophys. Res., v. 70, p. 5333, 1965.
Mass: 3.4 kg
Power (avg): 0.9 W
Questions and comments about this experiment can be directed to: Coordinated Request and User Support Office
Name | Role | Original Affiliation | |
---|---|---|---|
Dr. Charles Y. Fan | Other Investigator | University of Arizona | |
Prof. George Gloeckler | Other Investigator | University of Maryland | gg10@umail.umd.edu |
Dr. Gordon Lentz | Other Investigator | University of Chicago | |
Dr. John A. Simpson | Principal Investigator | University of Chicago |