Multilayer radiation shield for satellite electronic components protection

Hamideh Daneshvar,Shahryar Malekie,Seyed Hassan Sedighy,Armin Mosayebi,Ali Sadr,Kavoos Ghordoei Milan

doi:10.1038/s41598-021-99739-2

Hamideh Daneshvar, Shahryar Malekie + Show 4 more

Open Access

https://doi.org/10.1038/s41598-021-99739-2

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Abstract

In this paper, various multi-layer shields are designed, optimized, and analyzed for electron and proton space environments. The design process is performed for various suitable materials for the local protection of sensitive electronic devices using MCNPX code and the Genetic optimization Algorithm. In the optimizations process, the total ionizing dose is 53.3% and 72% greater than the aluminum shield for proton and electron environments, respectively. Considering the importance of the protons in the LEO orbits, the construction of the shield was based on designing a proton source. A sample shield is built using a combination of Aluminum Bronze and molybdenum layers with a copper carrier to demonstrate the idea. Comparisons of radiation attenuation coefficient results indicate a good agreement between the experimental, simulation, and analytical calculations results. The good specifications of the proposed multi-layer shield prove their capability and ability to use in satellite missions for electronic device protection.

Highlights

In this paper, various multi-layer shields are designed, optimized, and analyzed for electron and proton space environments
Various types of multi-layer shields in space conditions were designed, optimized, and analyzed for electron and proton environments. This is done for various suitable metals to be used as a local shield for the safety of electronic components, using the MCNPX Monte Carlo method and the Genetic Algorithm
These designed shields were discussed at different energies in all space conditions and compared with 2 mm thickness of Aluminum shields, which revealed the complete superiority of designed shields optimized for electrons up to 70% improve the total ionizing dose, and the shield designed for the proton improved the total ionizing dose up to 50%

Summary

Introduction

Various multi-layer shields are designed, optimized, and analyzed for electron and proton space environments. The total ionizing dose is 53.3% and 72% greater than the aluminum shield for proton and electron environments, respectively. One of the most effective solutions is using the appropriate shielding to protect sensitive electronic parts These shields should be designed by considering the satellite mass and volume budgets[3]. The satellite structure is the first radiation shield layer where its weight, vibration tolerance, natural frequency range and ability to withstand against space radiation should be considered in its design process. Computational methods are effective tools to design radiation shields The importance of this issue is result in the reliability enhancement of the satellite system, reducing operating costs and project r isks[3,25]. The MCNPX code simulation is performed by using these two types of particles, electrons and protons in the worst-case scenario

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