Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007georl..3421103w&link_type=abstract
Geophysical Research Letters, Volume 34, Issue 21, CiteID L21103
Astronomy and Astrophysics
Astrophysics
5
Planetary Sciences: Solar System Objects: Moon (1221), Solar Physics, Astrophysics, And Astronomy: Energetic Particles (2114), Space Weather: Space Radiation Environment, Magnetospheric Physics: Magnetotail
Scientific paper
The Moon spends 25% of its orbit within the terrestrial magnetosphere. The magnetic field from the terrestrial magnetosphere can potentially provide radiation shielding from solar energetic particle events and lower energy galactic cosmic rays, which can be a significant hazard during extra-vehicle activities or during human exploration of the lunar surface. The level of shielding provided by the terrestrial magnetosphere is calculated in conjunction with 3D multi-fluid simulations of the terrestrial magnetospheres. It is shown that the level of shielding is dependent on IMF orientation and location of the lunar base. The natural terrain could be used to augment the terrestrial shielding for an equatorial lunar base. A polar lunar base would be exposed to twice as much radiation. But in both cases shielding of GeV particles is possible, with the upper range depending on the prevailing solar wind conditions.
Harnett Erika M.
Winglee Robert M.
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