SA51D-06
Albedo protons and electrons at ISS – an important contribution to astronaut dose?
Friday, 18 December 2015: 09:45
2016 (Moscone West)
Ryan B Norman1, Tony C Slaba1, Francis F Badavi2, Christopher J Mertens1 and Steve Blattnig1, (1)NASA Langley Research Center, Hampton, VA, United States, (2)Old Dominion University, Norfolk, VA, United States
Abstract:
Albedo particles, which are created by cosmic ray interactions in the atmosphere and are moving upwards away from the surface of the earth, are often considered a negligible contribution to astronaut radiation exposure on the International Space Station (ISS). Models of astronaut exposure, however, consistently underestimate measurements onboard ISS when these albedo particles are neglected. Recent measurements by instruments on ISS (AMS, PAMELA, and SEDA-AP) hint that there are high energy protons and electrons which are not being modeled and that may contribute to radiation exposure on ISS. Estimates of the contribution of radiation exposure on ISS due to albedo particles, along with open questions, will be discussed.
