An Overview of First-Year Results from the Lunar Reconnaissance Orbiter (LRO) Cosmic Ray Telescope for the Effects of Radiation (CRaTER) (Invited)

Details An Overview of First-Year Results from the Lunar Reconnaissance Orbiter (LRO) Cosmic Ray Telescope for the Effects of Radiation (CRaTER) (Invited) An Overview of First-Year Results from the Lunar Reconnaissance Orbiter (LRO) Cosmic Ray Telescope for the Effects of Radiation (CRaTER) (Invited)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010agufmsh53c..04s&link_type=abstract

American Geophysical Union, Fall Meeting 2010, abstract #SH53C-04

Physics

[2104] Interplanetary Physics / Cosmic Rays, [2114] Interplanetary Physics / Energetic Particles, [2162] Interplanetary Physics / Solar Cycle Variations, [6250] Planetary Sciences: Solar System Objects / Moon

Scientific paper

We present an overview of science results from the Cosmic Ray Telescope for the Effects of Radiation (CRaTER) obtained during its first year of operations aboard the Lunar Reconnaissance Orbiter (LRO) at the Moon. CRaTER has been immersed in the ionizing radiation environment of the Moon since its launch on NASA’s LRO in June 2009. CRaTER measures the linear energy transfer (LET) of energetic particles traversing the instrument, a quantity that describes the rate at which particles lose kinetic energy as they pass through matter. A significant portion of the kinetic energy converts into deleterious ionizing radiation through the interactions with matter, thus posing a major radiation risk for human and robotic space explorers subjected to deep space energetic particles. CRaTER employs strategically placed solid-state detectors and tissue equivalent plastic (TEP), a synthetic analog for human tissue, to quantify radiation effects pertinent to astronaut safety. In this talk, we present science highlights resulting from CRaTER studies. These CRaTER science results include: radiation dose rate estimates during the recent deep, prolonged solar minimum; lunar orbit dose rate comparisons with Apollo-era estimates; assessment of variability of galactic cosmic rays and their sources; first direct observations of albedo protons from the lunar regolith and comparison with models; and detection of first, weak solar-related energetic particle events of the new solar cycle.

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