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Measurements Of Galactic Cosmic Ray Shielding With The Crater Instrument, C. Zeitlin, A. W. Case, Harlan E. Spence, Nathan A. Schwadron, M. Golightly, Jody K. Wilson, J. C. Kasper, J. B. Blake, M. D. Looper, J. E. Mazur, L. W. Townsend, Y. Iwata
Measurements Of Galactic Cosmic Ray Shielding With The Crater Instrument, C. Zeitlin, A. W. Case, Harlan E. Spence, Nathan A. Schwadron, M. Golightly, Jody K. Wilson, J. C. Kasper, J. B. Blake, M. D. Looper, J. E. Mazur, L. W. Townsend, Y. Iwata
Physics & Astronomy
[1] The Cosmic Ray Telescope for the Effects of Radiation (CRaTER) instrument aboard the Lunar Reconnaissance Orbiter has been measuring energetic charged particles from the galactic cosmic rays (GCRs) and solar particle events in lunar orbit since 2009. CRaTER includes three pairs of silicon detectors, separated by pieces of tissue-equivalent plastic that shield two of the three pairs from particles incident at the zenith-facing end of the telescope. Heavy-ion beams studied in previous ground-based work have been shown to be reasonable proxies for the GCRs when their energies are sufficiently high. That work, which included GCR simulations, led to predictions …
The Radiation Environment Near The Lunar Surface: Crater Observations And Geant4 Simulations, M. D. Looper, J. E. Mazur, J. B. Blake, Harlan E. Spence, Nathan A. Schwadron, M. J. Golightly, A. W. Case, J. C. Kasper, L. W. Townsend
The Radiation Environment Near The Lunar Surface: Crater Observations And Geant4 Simulations, M. D. Looper, J. E. Mazur, J. B. Blake, Harlan E. Spence, Nathan A. Schwadron, M. J. Golightly, A. W. Case, J. C. Kasper, L. W. Townsend
Physics & Astronomy
[1] At the start of the Lunar Reconnaissance Orbiter mission in 2009, its Cosmic Ray Telescope for the Effects of Radiation instrument measured the radiation environment near the Moon during the recent deep solar minimum, when galactic cosmic rays (GCRs) were at the highest level observed during the space age. We present observations that show the combined effects of GCR primaries, secondary particles (“albedo”) created by the interaction of GCRs with the lunar surface, and the interactions of these particles in the shielding material overlying the silicon solid-state detectors of the Cosmic Ray Telescope for the Effects of Radiation. We …