Studying the effects of multi-layer shielding in reducing space radiations exposure of human and electrical components in space missions

Protection of astronauts and electronic components in satellites and spacecraft against space rays is one of the most important primary requirements in space missions. In this work, the effect of three materials, aluminum, as the most common material, polyethylene, and a graded-z structure, in the protection of space radiations has been evaluated. The calculations of the dose caused by these radiations on the human body and a silicon piece have been carried out by MCNPX Monte Carlo code. The dose caused by cosmic rays has been calculated after applying shields of aluminum, graded-z structure