Speaker
Description
Dr. D. Laurence Thomsen III
NASA Langley Research Center, Advanced Materials and Processing Branch, 6A West Taylor Street, Hampton, VA 23681. Ph: 757-864-4211, Fax: 757-864-8312, Email: d.l.thomsen@nasa.gov.
NASA Shields-1 will be launched in the upcoming NASA CubeSat Launch Initiative (CSLI) ELaNaXIX Mission in December 2018. Shields-1 hosts a research payload experiment with 8 μdosimeters behind radiation shielding in slab geometries to make dose-depth curves. Shields-1 hosts atomic number (Z)-graded radiation shielding materials as part of the research payload with baseline aluminum materials for the comparison of dose-depth curves. This radiation shielding experiment has been prepared from radiation shielding computational modeling of a geotransfer orbit (GTO) with slab geometries using GEANT4 MUlti-LAyered Shielding SImulation Software (MULASSIS) from The Space Environment Information System (SPENVIS). Z-graded radiation shielding materials show a ~30% increased shielding effectiveness for electrons at half the thickness in comparison to aluminum of the same areal density The Shields-1 electronics enclosure (vault) has been developed using the LaRC Z-Shielding materials for reducing total ionizing dose on the electronic cards in order to increase the mission lifetime of the commercial parts.
