Shielding electronics behind composite structures

Spieth, Bethany; Qassim, Karim; Pittman, Roland N.; Russell, D. A.

doi:10.1109/23.736524

Cited by 9 publications

(2 citation statements)

References 5 publications

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“…The superior performance of composite shields has already been identified by previous studies [36,[39][40][41] and can be understood from the perspective of dose enhancement effects taking place at the interface of dissimilar materials [42][43][44]. Most of these studies though approach the problem from another perspective: they either compare the composite shield to aluminum, a commonly used and well-studied material, or they compare different composites materials with one another.…”

Section: Plos Onementioning

confidence: 98%

A biomimetic approach to shielding from ionizing radiation: The case of melanized fungi

Vasileiou

Summerer

2020

PLoS ONE

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Melanized fungi have been shown to thrive in environments with high radionuclide concentrations, which led to the association of the pigment melanin with the protection against ionizing radiation. Several hypotheses regarding the function of melanin have been proposed. Yet, the exact mechanism behind the protective property of melanin is unclear and poorly explored. A better understanding of the mechanisms that are involved in increasing the tolerance of the organisms to ionizing radiation could lead to technology transfer to humanrelated applications. Effective protection from radiation is essential for human space flight in general and human missions beyond Low Earth Orbit specifically. In this paper, we follow a biomimetic approach: we test two of current hypotheses and discuss how they could be applied to radiation shield designs. First we focus on the interaction of melanin with high energy electrons, which has been suspected to reduce the kinetic energy of the electrons through a cascade of collisions, thus providing physical shielding. Second, we investigate if the spatial arrangement of melanin, organized as a thin film or a collection of hollow microspheres, affects its shielding properties. To this end, we measured experimentally and by numerical simulations the attenuation of β-radiation as pass through solutions and suspensions of melanin and contrasted the values to the ones of cellulose, a substance with similar elemental composition. Further, we investigate the spatial arrangement hypothesis using Monte Carlo simulations. In agreement with the simulations, our experiments indicated that melanin does not provide improved shielding in comparison to cellulose from β-radiation. However, our simulations suggest a substantial effect of the spatial arrangement on the shielding performance of melanin, a pathway that could be transferred to the design of composite radiation shields.

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Section: Plos Onementioning

confidence: 98%

A biomimetic approach to shielding from ionizing radiation: The case of melanized fungi

Vasileiou

Summerer

2020

PLoS ONE

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“…Cherng et al [7] used Monte Carlo simulation and found that when the thickness of shielding layer was > 10g/cm 2 , the shielding effect of the aluminum/tungsten composite scheme was better than the single layer aluminum shielding scheme. Spieth et al [8] analyzed the radiation shielding effect of composite electronic case on space highenergy particles, and research results show that under the same shielding effect, the composite case with high Z filler can reduce weight by 30% compared with aluminum alloy. The design of multi-layer radiation shielding scheme is a typical design problem with multiple objectives [9], which needs to balance the areal density, thickness, shielding effect and other objectives.…”

Section: Introductionmentioning

confidence: 99%

Optimization of radiation shielding scheme for Jupiter spacecraft based on genetic algorithm

Guan

Liu

et al. 2023

Third International Conference on Digital Signal and Computer Communications (DSCC 2023)

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Jupiter is one of the targets for deep space exploration, but it has a harsher radiation environment than Earth. In order to reduce the damage of the radiation environment to the spacecraft, the radiation shielding scheme should be optimized. In this paper, the main optimization objective is to reduce the total radiation dose after shielding, and we balanced the areal density, thickness and shielding effect. Combined with genetic algorithm and MULASSIS, the optimal design of multilayer radiation shielding scheme of Jupiter spacecraft is studied. Through this method, the optimal shielding scheme - Mg-Pb-Mg-Al four-layer shielding structure is obtained. Compared with the single-layer shielding scheme of Galileo and other spacecraft, the optimal multi-layer shielding scheme can reduce the material mass by at least 14.4%. This design method could also be combined with the actual Jupiter exploration mission, providing a reference for the shielding design of deep space exploration spacecraft in the future.

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A study on grid-stiffened multi-functional composite structures with radiation spot shielding

Jang

Rhee

Hyun

et al. 2016

Aerospace Science and Technology

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Shielding electronics behind composite structures

Cited by 9 publications

References 5 publications

A biomimetic approach to shielding from ionizing radiation: The case of melanized fungi

A biomimetic approach to shielding from ionizing radiation: The case of melanized fungi

Optimization of radiation shielding scheme for Jupiter spacecraft based on genetic algorithm

A study on grid-stiffened multi-functional composite structures with radiation spot shielding

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