HR: 0800h
AN: SM31A-0239    [Abstracts]
TI: The Galileo Heavy Ion Environment--Update to the HIC Model
AU: * Evans, R W
EM: Robin.evans@jpl.nasa.gov
AF: Gibbel Corp., 2550 Honolulu Blvd., Montrose, CA 91020, United States
AU: Garrett, H B
EM: henry.garrett@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, (MS 122-107) 4800 Oak Grove Dr., Pasadena, CA 91109, United States
AU: Jun, I
EM: Insoo.Jun@jpl.nasa.gov
AF: Jet Propulsion Laboratory, California Institute of Technology, (MS 122-107) 4800 Oak Grove Dr., Pasadena, CA 91109, United States
AU: Stone, E C
EM: ecs.@srl.caltech.edu
AF: California Institute of Technology, (MS 220-47), Pasadena, CA 91125, United States
AU: Cohen, C M
EM: cohen@srl.caltech.edu
AF: California Institute of Technology, (MS 220-47), Pasadena, CA 91125, United States
AU: Drouilhet, S J
EM: galois@mnstate.edu
AF: Minnesota State University Moorhead, 1104 7th Ave. South, Moorehead, MN 56563, United States
AB: From 1995 to 2003, the Galileo Heavy Ion Counter (HIC) monitored the high energy (~6 to >200 MeV/nuc), heavy ion (₆C to ₂₈Ni) fluxes at Jupiter and returned data for all but 2 of the 35 orbits of the Jupiter system. HIC was based on a re-engineered Voyager Cosmic Ray System instrument and was added to gain a better understanding of the heavy ion radiation environment at Jupiter than that given by the brief flyby missions of Pioneer and Voyager. HIC, as did these spacecraft, found Oxygen and Sulfur to be the primary constituents in the heavy ion environment at Jupiter and adds Carbon to the list. The Carbon is believed to be of solar origin while Oxygen is of mixed solar origin and sputtering off the icy moons of Jupiter. Sulfur is Io-genic. In a previous study, a "HIC Model" was generated from the instrument data to provide estimates of the SEU environment for Jupiter orbiting spacecraft. This presentation updates that model and attempts to fit its findings into the overall picture of ion diffusion at Jupiter as presented by Gehrels, Stone, Cohen, and their colleagues.
DE: 2114 Energetic particles (7514)
DE: 2774 Radiation belts
DE: 6220 Jupiter
DE: 7514 Energetic particles (2114)
DE: 7984 Space radiation environment
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting