Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990itns...37.1555h&link_type=abstract
IEEE Transactions on Nuclear Science (ISSN 0018-9499), vol. 37, Oct. 1990, p. 1555-1559.
Astronomy and Astrophysics
Astronomy
Cosmic Rays, Geomagnetism, Magnetically Trapped Particles, Neutral Beams, Proton Beams, Proton Flux Density, Decay Rates, Earth Orbital Environments, Magnetic Effects, Proton Irradiation, Radiation Hazards
Scientific paper
Because of the potential for the charged effluence from an orbital neutral particle beam (NPB) system to become trapped in the earth's magnetic field, the creation of long-lived fluxes, relics of the NPB operation, is possible. The circumstances that can lead to trapping of protons from an H0 NPB system operated at altitudes of 300-1000 km are considered. A first-order assessment of the flux levels and decay rates of the relic protons produced by an orbital NPB system are presented. These considerations indicate that although the production of trapped protons is easily avoided, the sustained operation of an NPB of modest scale has the capability to significantly enhance the near-earth radiation environment for up to several years, and as such could contribute to the radiation hazard experienced by astronauts.
Cottingame W. B.
Hughes Richard J.
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