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Paper detail

Extremely high reflection of solar wind protons as neutral hydrogen atoms from regolith in space

We report on measurements of extremely high reflection rates of solar wind particles from regolith-covered lunar surfaces. Measurements by the Sub-keV Atom Reflecting Analyzer (SARA) instrument on the Indian Chandrayaan-1 spacecraft in orbit around the Moon show that up to 20% of the impinging solar wind protons are reflected from the lunar surface back to space as neutral hydrogen atoms. This finding, generally applicable to regolith-covered atmosphereless bodies, invalidates the widely accepted assumption that regolith almost completely absorbs the impinging solar wind.

preprint2010arXivOpen access
Martin WieserStas BarabashYoshifumi FutaanaMats HolmströmAnil BhardwajR SridharanMB DhanyaPeter WurzAudrey SchaufelbergerKazushi Asamura
physics.space-phphysics.plasm-phastro-ph.EP
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Martin WieserStas BarabashYoshifumi FutaanaMats HolmströmAnil BhardwajR SridharanMB DhanyaPeter WurzAudrey SchaufelbergerKazushi Asamura

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