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首页> 外文期刊>Journal of Nuclear Physics, Material Sciences, Radiation and Applications >Optimization of the Position of the CR-39 Polycarbonate Sheet Inside the Solid State Track Detector “Measuring Device” Through Computational Fluid Dynamics Technique
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Optimization of the Position of the CR-39 Polycarbonate Sheet Inside the Solid State Track Detector “Measuring Device” Through Computational Fluid Dynamics Technique

机译：通过计算流体动力学技术优化CR-39聚碳酸酯片内的CR-39聚碳酸酯片的位置

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The “measuring device” is one of the most reliable, efficient and economic indoor radon dosimeters that exist. This device was developed by the Proyecto de Aplicaciones de la Dosimetría (PAD) at the Physics Institute of UNAM (IF-UNAM) and consists of a transparent rigid plastic cup, a CR-39 polycarbonate sheet and a standard size metal clip that is used to hold the polycarbonate in the center of the cup. The cup is wrapped and covered with a low-density polyurethane protector in order to prevent the detector from being irradiated by ionizing particles found in the environment. In this work, an analysis was carried out that allowed to understand how the radon concentration on the polycarbonate sheet varies when its height is changed with respect to the base of the plastic cup, in order to understand what position increase the probability of interaction between radon and the surface of the detector. For the development of this work, four computational simulations were performed with the technique called Computational Fluid Dynamics (CFD). The results shows that as the CR-39 is positioned more closed to the base of the cup, the probability of interaction of the radon and the detector increase. Based on these results it is concluded that, when there is a limit in the time in which a measuring device can be placed in the zone where it is desired to quantify indoor radon, it is recommended to collocated the CR-39 at 1 cm with respect to the base of the cup.
机译：“测量装置”是存在的最可靠，高效，经济的室内氡气剂量之一。该设备由Proyecto de Aplicaciones de ladosimetrí（垫）在Unam（Unam）的物理研究所（If-Unam），由透明的刚性塑料杯，Cr-39聚碳酸酯板和使用的标准尺寸金属夹组成将聚碳酸酯固定在杯子的中心。杯子用低密度聚氨酯保护剂包裹并覆盖，以防止检测器通过在环境中发现的电离颗粒而被照射。在这项工作中，进行了分析，以了解当其高度相对于塑料杯的底部改变时，允许了解聚碳酸酯片上的氡浓度如何变化，以便理解氡之间的相互作用概率的位置和探测器的表面。为了开发这项工作，使用称为计算流体动力学（CFD）的技术进行了四种计算模拟。结果表明，当Cr-39定位到杯子的底部时，氡和检测器的相互作用的概率增加。基于这些结果，得出结论，当测量装置可以放置在需要量化室内氡时的区域时，建议将CR-39置于1厘米尊重杯子的基础。

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