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Materials Degradation in the Jovian Radiation EnvironmentThe radiation environment of Jupiter represents a significant hazard for Europa Lander deorbit stage components, and presents a significant potential mission risk. The radiolytic degradation of ammonium perchlorate (AP) oxidizer in solid propellants may affect its properties and performance. The Monte Carlo code MONSOL was used for modeling of laboratory experiments on the electron irradiation of propellant samples. An approach for flattening dose profiles along the depth of irradiated samples is proposed. Depth-dose distributions produced by Jovian electrons in multi-layer slabs of materials are calculated. It is found that the absorbed dose in a particular slab is significantly affected by backscattered electrons and photons from neighboring slabs. The dose and radiolytic decomposition of AP crystals are investigated and radiation-induced chemical yields and weight percent of radical products are reported.
Document ID
Acquisition Source
Marshall Space Flight Center
Document Type
Miloshevsky, Gennady
(Purdue Univ. West Lafayette, IN, United States)
Caffrey, Jarvis A.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Jones, Jonathan E.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Zoladz, Thomas F.
(NASA Marshall Space Flight Center Huntsville, AL, United States)
Date Acquired
December 19, 2017
Publication Date
June 21, 2017
Subject Category
Space Radiation
Chemistry And Materials (General)
Report/Patent Number
Distribution Limits
Public Use Permitted.
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