The advances of laser-driven electron acceleration offer the promise of great reductions in the size of high-energy electron accelerator facilities. Accordingly, it is desirable to design compact radiation shielding for such facilities. A key component of radiation shielding is the high-energy electron beam dump. In an effort to optimize the electron beam dump design, different material combinations have been simulated with the FLUKA Monte Carlo code in the range of 1–40 GeV. The studied beam dump configurations consist of alternating layers of high-Z material (lead or iron) and low-Z material (high-density concrete or borated polyethylene) in either three-layer or five-layer structures. The designs of various beam dump configuration have been compared and it has been found that the iron and concrete stacking in a three-layer structure with a thick iron layer results in the lowest dose at 1, 10, and 40 GeV. The performance of the beam dump exhibits a strong dependence on the selected materials, the stacking method, the beam dump thickness, as well as the electron energy. This parametric study provides general insights that can be used for compact shielding design of future electron accelerator facilities.

激光驱动电子加速技术的进步有望大幅缩小高能电子加速器设施的尺寸。因此，希望为此类设施设计紧凑的辐射屏蔽。辐射屏蔽的一个关键组成部分是高能电子束转储器。为了优化电子束转储设计，已使用 FLUKA Monte Carlo 代码在 1–40 GeV 范围内模拟了不同的材料组合。所研究的光束倾卸装置配置由三层或五层结构中的高 Z 材料（铅或铁）和低 Z 材料（高密度混凝土或硼酸聚乙烯）的交替层组成。比较了各种排束器配置的设计，发现铁和混凝土以三层结构堆叠，铁层较厚，剂量最低，为 1、10 和 40 GeV。束流收集器的性能表现出对所选材料、堆叠方法、束流收集器厚度以及电子能量的强烈依赖。这项参数研究提供了可用于未来电子加速器设施紧凑屏蔽设计的一般见解。