Laminated lightweight radiation shielding materials

摘要

Laminated materials or structures that provide radiation shielding for spacecraft components in an orbiting spacecraft against electron and proton radiation. The laminated materials or structures have three laminated layers. The first layer (11) is made of one or more materials having a low Z/A (atomic number/atomic weight) ratio that preferentially attenuates electron and proton radiation, although they may generate Bremsstrahlung radiation in the process. The second layer (12) is made of one or more materials with a high Z<2>/A (atomic number squared/atomic weight) ratio that preferentially attenuate Bremsstrahlung radiation, although the materials may generate photo-electrons in the process. The third layer (13) is made of one or more materials having a low Z/A (atomic number/atomic weight) ratio that attenuate photo-electrons emitted from the second layer, as well as electrons and protons that pass through the first and second layers. <IMAGE>