Helium-3 inventory of lunar samples: A potential future energy resource for mankind?

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Clean Energy, Fuel Production, Helium Isotopes, Lunar Resources, Regolith, Solar Wind, Fission, Ilmenite, Lunar Mantle, Lunar Soil, Mineralogy

Scientific paper

Recent public concern over the safety, cost, and environmental impact of the worldwide fission reactors has focused the attention of scientists and engineers towards perfecting fusion technology because it promises a much more environmentally acceptable 'clean' energy supply. The fusion reaction D-2 + He-3 yields p(14.7 MeV) + He-4(3.6 MeV) has long been recognized as an ideal candidate for producing commercially 'safer and cleaner' fusion power. Naturally occurring He-3 is scarce on earth; however, lunar regolith is a potential ore for He-3 because the high He-3 in solar wind has been implanted in the lunar regolith for more than 4 x 109 years, along with other volatile species. The helium abundance in lunar soils is dependent not only on the maturity of soils (IS/FeO) but also on their mineralogy. The titanium-rich (ilmenite) lunar soils are important repositories for volatiles, which may be released by heating these soils up to approximately 700 C.

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