DocumentCode :
1064275
Title :
Radiation Shielding Study of Advanced Data and Power Management Systems (ADPMS) Housing Using Geant4
Author :
García, F. ; Kurvinen, K. ; Brander, T. ; Orava, R. ; Heino, J. ; Virtanen, A. ; Kettunen, H. ; Tenhunen, M.
Author_Institution :
Univ. of Helsinki, Helsinki
Volume :
55
Issue :
1
fYear :
2008
Firstpage :
644
Lastpage :
648
Abstract :
A design goal for current space system is to reduce the mass used to enclose components of the spacecraft. One potential target is to reduce the mass of electronics and its housings. The use of composite materials, especially CFRP (Carbon Fiber Reinforced Plastic) is a well known and vastly used approach to mass reduction. A design goal, cost reduction, has increased the use of commercial (non-space qualified) electronics. These commercial circuits and other components cannot tolerate as high radiation levels as space qualified components. Therefore, the use of standard electronics components poses a challenge in terms of the radiation protection capability of the ADPMS housings. The main goal of this study is to provide insight on the radiation shielding protection produced by different configurations of CFRP tungsten laminates of epoxies and cyanate esters and then to compare them to the protection given by the commonly used aluminum. For a spacecraft operating in LEO and MEO orbits the main components of the space radiation environment are energetic electrons and protons, therefore in our study we will compare the experimental and simulation results of the radiation attenuation of different types of laminates for those particles. At the same time the experimental data has been used to validate the Geant4 model of the laminates, which can be used for future optimizations of the laminate structures.
Keywords :
carbon fibre reinforced plastics; laminates; nuclear engineering computing; radiation protection; shielding; space vehicles; tungsten; ADPMS housing; CFRP tungsten laminates; Geant4 software toolkit; LEO orbits; MEO orbits; carbon fiber reinforced plastics; composite materials; cyanate esters; electronics components; electrons; epoxies; optimizations; protons; radiation protection; radiation shielding; spacecraft components; Aerospace electronics; Aircraft manufacture; Circuits; Composite materials; Costs; Energy management; Fiber reinforced plastics; Laminates; Power system management; Protection; Advanced equipment design; GEANT4; LEO and MEO orbits; carbon composite laminates; low ${rm Z}$ – high ${rm Z}$ – low ${rm Z}$ concept; radiation attenuation; shielding;
fLanguage :
English
Journal_Title :
Nuclear Science, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9499
Type :
jour
DOI :
10.1109/TNS.2007.913485
Filename :
4448483
Link To Document :
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