Physics
Scientific paper
May 1992
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992ssrv...60...79f&link_type=abstract
Space Science Reviews (ISSN 0038-6308), vol. 60, no. 1-4, May 1992, p. 79-90.
Physics
3
Atmospheric Entry, Energetic Particles, Galileo Probe, Jupiter Probes, Planetary Magnetospheres, Satellite-Borne Instruments, Alpha Particles, Electron Energy, Heavy Ions, Proton Energy
Scientific paper
The EPI instrument operates during the pre-entry phase of the Galileo Probe. The main objective is the study of the energetic particle population in the inner Jovian magnetosphere and in the upper atmosphere. This will be achieved through omnidirectional measurements of electrons, protons, alpha-particles and heavy ions (Z greater than 2) and recording intensity profiles with a spatial resolution of about 0.02 Jupiter radii. Sectored data will also be obtained for electrons, protons, and alpha-particles to determine directional anisotropies and particle pitch angle distributions. The detector assembly is a two-element telescope using totally depleted circular silicon surface-barrier detectors surrounded by cylindrical tungsten shielding. The lower energy threshold of the particle species investigated during the Probe's pre-entry phase is determined by the material thickness of the Probe's rear heat shield which is required for heat protection of the scientific payload during entry into the Jovian atmosphere. The EPI instrument is combined with the Lightning and Radio Emission Detector and both instruments share one interface of the Probe's power, command, and data unit.
Bach J.
Fischer Mark Hannes
Gliem F. O.
Lanzerotti Louis J.
Mihalov John D.
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