In this investigation, the impact of water thickness and various types of concrete materials, each characterized by different densities and elemental compositions, is examined for their role in shielding a radiation generator based on Inertial Electrostatic Confinement Fusion (IECF) device. The study focuses on assessing several vital parameters, including the effective removal cross-section (∑) for fast neutrons, total mass attenuation coefficients (μ), linear attenuation coefficients (μ), half-value layer (HVL), and mean free path (MFP) for X-rays across different concrete types. Different water thicknesses around the IECF chamber, ranging from 0.5 to 10.0 cm, are investigated, and five concrete types are evaluated: Ilmenite-magnetite Concrete (IMC), Ordinary Concrete-1 (OC1), Barite-containing Concrete (BC), Ordinary Concrete-2 (OC2), and Serpentine-containing Concrete (SC). The results indicate that, among these materials, SC requires the least thickness to attenuate 2.45 MeV generated from IECF to 1/100th of its initial intensity across varying water thicknesses (6.5 cm in case of 5 cm water thickness). The values of μ, HVL, and MFP are also calculated for different water thicknesses and X-ray energies (ranging from 0.2 to 3.0 MeV). These calculations highlight BC as the material requiring the least thickness to attenuate X-rays to 1/100th of their initial intensity. Moreover, neutron dose rate measurements are conducted on a commercial IECF system shielded with 50 cm of water and operated at a neutron intensity of 10 ns which was ∼12 nSv/h on average, approximately 0.002% of the initial intensity. This underscores the efficacy of water shielding in attenuating the outcomes of IECF.

中文翻译：

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利用混凝土和水的惯性静电约束聚变系统的辐射屏蔽

在这项研究中，研究了水厚度和各种类型的混凝土材料（每种材料具有不同的密度和元素成分）的影响，以了解它们在屏蔽基于惯性静电约束聚变（IECF）装置的辐射发生器中的作用。该研究重点评估几个重要参数，包括快中子的有效去除截面（Σ）、总质量衰减系数（μ）、线性衰减系数（μ）、半值层（HVL）和平均自由程(MFP) 用于不同混凝土类型的 X 射线。研究了 IECF 室周围不同水厚度（范围为 0.5 至 10.0 厘米），并评估了五种混凝土类型：钛铁矿-磁铁矿混凝土 (IMC)、普通混凝土-1 (OC1)、含重晶石混凝土 (BC)、普通混凝土Concrete-2 (OC2) 和含蛇纹石混凝土 (SC)。结果表明，在这些材料中，SC 需要最小的厚度才能在不同的水厚度（5 cm 水厚度的情况下为 6.5 cm）内将 IECF 产生的 2.45 MeV 衰减至其初始强度的 1/100。还计算了不同水厚度和 X 射线能量（范围从 0.2 到 3.0 MeV）的 μ、HVL 和 MFP 值。这些计算强调 BC 是需要最小厚度才能将 X 射线衰减至其初始强度的 1/100 的材料。此外，中子剂量率测量是在商业 IECF 系统上进行的，该系统用 50 cm 的水屏蔽，并在 10 ns 的中子强度下运行，平均约为 12 nSv/h，约为初始强度的 0.002%。这强调了水屏蔽在减弱 IECF 效果方面的功效。