Low-energy neutral atoms in the Earth's magnetosphere: modeling

Details Low-energy neutral atoms in the Earth's magnetosphere: modeling Low-energy neutral atoms in the Earth's magnetosphere: modeling

Jun 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992spie.1744...51m&link_type=abstract

Proc. SPIE Vol. 1744, p. 51-61, Instrumentation for Magnetospheric Imagery, Supriya Chakrabarti; Ed.

Physics

Scientific paper

Detection of low energy neutral atoms (LENAs) produced by the interaction of the Earth's geocorona with ambient space plasma has been proposed as a technique to obtain global information about the magnetosphere. Recent instrumentation advances reported previously and in these proceedings (McComas, et al., Funsten, et al.) provide an opportunity for detecting LENAs in the energy range of < 1 keV to approximately 50 keV. In this paper, we present results from a numerical model which calculates line of sight LENA fluxes expected at a remote orbiting spacecraft for various magnetospheric plasma regimes. This model uses measured charge exchange cross sections, either of two neutral hydrogen geocorona models, and various empirical models of the ring current and plasma sheet to calculate the contribution to the integrated directional flux from each point along the line of sight of the instrument. We discuss implications for LENA imaging of the magnetosphere based on these simulations.

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