Topic
Shields
About: Shields is a research topic. Over the lifetime, 1456 publications have been published within this topic receiving 10896 citations.
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TL;DR: In this paper, a survey covers analytical, numerical and experimental studies in which the effect of layering, spacing and change of the order of the plates on the protective performance of metallic shields against high-speed impact is investigated.
16 citations
TL;DR: In this article , three borate glasses with the chemical composition 50B2O3 + xLi2O + 20ZnO + (30 - x) Na2O (where x = 5, 10, and 20 mol. %) and coded as BLZN-A, BLZNs-B, and BLZn-C were reported and investigated for their gamma-ray, charged particle (electrons, protons, alpha particles and carbon ions), and neutrons shielding viability.
Abstract: Three borate glasses with the chemical composition 50B2O3 + xLi2O + 20ZnO + (30 - x) Na2O (where x = 5, 10, & 20 mol. %) and coded as BLZN-A, BLZN-B, and BLZN-C were reported and investigated for their gamma-ray, charged particle (electrons, protons, alpha particles and carbon ions), and neutrons shielding viability. The gamma ray attenuation coefficients were computed by the FLUKA simulations and XCOM methods, while the stopping powers and range of the particles were evaluated based on SRIM software and NIST database. The obtained results showed that gamma-ray and charged particle shielding ability increases for the present glass samples in the order of BLZN-A < BLZN-B < BLZN-C for radiation energies of 0.01–10 MeV. The removal cross section corresponds to 0.106, 0.1087, and 0.1132 cm−1 for BLZN-A, BLZN-B, and BLZN-C, while the total cross section for thermal neutron is 69.91, 71.46, and 73.83 cm−1. The shielding performance of the glasses is higher than those of some conventional shields such as ordinary concrete and commercial glass shields. Thus, the present BLZN glass system have huge potential for practical applications in hospitals and nuclear facilities.
16 citations
TL;DR: In this article, a new way to improve shielding performance by using a combination of light material attached to a rear aluminum wall instead of a single aluminum wall with the same areal density was proposed.
16 citations
Patent•
26 Sep 2003
TL;DR: In this article, a method and apparatus for the generation of multilayered coatings onto substrates is described, which is a closed field unbalanced magnetron configuration in conjunction with one or more cylindrical and rotatable shields and a substrate carrier.
Abstract: The invention relates to a method and apparatus for the generation of multilayered coatings onto substrates. Typically the apparatus used is a closed field unbalanced magnetron configuration in conjunction with one or more cylindrical and rotatable shields and a substrate carrier on which the substrates to be coated are carried. The shields and substrate holder are provided for rotation about a common axis of rotation. The shields are provided with apertures to allow the selective positioning of the apertures to define a passage or passages along which material from the targets can pass onto the substrates. The targets can be cleaned prior to the coating stage by operation of the targets with the shields selectively positioned to prevent the deposited material from reaching the substrates.
16 citations