Model calculation of energetic neutral atoms precipitation at low altitudes

Details Model calculation of energetic neutral atoms precipitation at low altitudes Model calculation of energetic neutral atoms precipitation at low altitudes

Jan 1994

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1994jgr....9913489o&link_type=abstract

Journal of Geophysical Research (ISSN 0148-0227), vol. 99, no. A7, p. 13,489-13,498

Physics

31

Charge Exchange, Energetic Particles, Geocoronal Emissions, Neutral Atoms, Particle Precipitation, Radiation Belts, Remote Sensing, Ampte (Satellites), Computerized Simulation, Earth Magnetosphere, Geomagnetism, Hydrogen Ions, Oxygen Ions

Scientific paper

It has become apparent during recent years that global magnetospheric imaging through the detection of energetic neutral atoms (ENA) will be a crucial tool for the advancement of magnetospheric research via remote sensing technique. This report presents model calculations of ENA precipitation as detectable from a satellite orbiting at low altitudes (less than 1500 km). The ENA generation via charge exchange between energetic ions and geocoronal neutrals is simulated in the inner magnetosphere, between 1.5 R(sub E) and 10 R(sub E), where both neutral densities and ion fluxes are significantly high. Active Magnetospheric Particle Tracer Explorer/Charge Composition Explorer (AMPTE/CCE) energetic ion measurements and the geocoronal neutral H altitude profile are used to simulate the charge exchange process leading to ENA production. We discuss the relative contribution of ring current and radiation belts, as well as the relative contribution of H(+) and O(+) to the ENA generation.

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