J
John F. Cooper
Researcher at Goddard Space Flight Center
Publications - 96
Citations - 2281
John F. Cooper is an academic researcher from Goddard Space Flight Center. The author has contributed to research in topics: Solar wind & Cosmic ray. The author has an hindex of 21, co-authored 96 publications receiving 2047 citations. Previous affiliations of John F. Cooper include STX Corporation & University of Colorado Boulder.
Papers
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Energetic Ion and Electron Irradiation of the Icy Galilean Satellites
TL;DR: Galileo Orbiter measurements of energetic ions (20 keV to 100 MeV) and electrons (20-700 keV) in Jupiter's magnetosphere are used, in conjunction with the JPL electron model (less than 40 MeV), to compute irradiation effects in the surface layers of Europa, Ganymede, and Callisto as mentioned in this paper.
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Proton Irradiation of Centaur, Kuiper Belt, and Oort Cloud Objects at Plasma to Cosmic Ray Energy
TL;DR: In this paper, the authors present model flux spectra derived from spacecraft data and models for eV to GeV protons at 40 AU, a termination shock position at 85 AU, and galactic cosmic ray ions from the Local Interstellar Medium (LISM).
Radiation effects on the surfaces of the Galilean satellites
Robert E. Johnson,Robert W. Carlson,John F. Cooper,Chris Paranicas,Marla H. Moore,M. C. Wong +5 more
TL;DR: The surfaces of Jupiter's moons are profoundly weathered by jovian charged particle and solar ultraviolet (UV) irradiation, and it has only recently been shown quantitatively that radiolysis and photolysis, the chemical alteration of a surface by charge-particles and by the solar UV, are in fact occurring on the surfaces of these moons.
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Production, ionization and redistribution of O2 in Saturn's ring atmosphere
Robert E. Johnson,Robert E. Johnson,Janet G. Luhmann,R. L. Tokar,M. Bouhram,J. J. Berthelier,Edward C. Sittler,John F. Cooper,T. W. Hill,Howard Smith,M. Michael,M. Liu,F. J. Crary,D. T. Young +13 more
TL;DR: In this article, a model for the toroidal O2 atmosphere indicated by the detection of O 2 + and O 2+ over the main rings was described for the Saturn's magnetosphere.
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Surface-bounded atmosphere of Europa
TL;DR: In this paper, a collisional Monte Carlo model of Europa's atmosphere is described, in which the sublimation and sputtering sources of H2O molecules and their molecular fragments are accounted for as well as the radiolytically produced O2.