Abstract

In this paper, we calculate the equivalent flux and nonionization dose of neutrons emitted by plutonium dioxide-based radioisotope thermal blocks (TBs) mounted as assemblies on the landing module (LM) of the spacecraft (SC) Exomars-2020. These parameters characterize the nonionization interaction of neutrons with materials of modern integrated circuits (ICs), the so-called displacement effects or structural damage. As an example, an assessment was performed for Russian devices installed on the LM at minimal distances from the TB assemblies. The results are compared with typical values ​​of IC resistance to structural damage. The sizes of the characteristic areas of the device location on the LM, where displacement effects in the IC components cannot be neglected, and moreover, can cause device failure, are also determined.

中文翻译：

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2020年航天器Exomars着陆模块的无线电电子设备中的位移损坏影响评估

摘要

在本文中，我们计算了作为组件安装在航天器（SC）Exomars-2020的二氧化ton基放射性同位素热块（TB）发出的中子的等效通量和非电离剂量。这些参数表征了中子与现代集成电路（IC）材料的非电离相互作用，所谓的位移效应或结构破坏。例如，对安装在LM上距TB组件最小距离的俄罗斯设备进行了评估。将结果与IC抗结构破坏的典型值进行比较。还确定了LM上器件位置的特征区域的大小，在该区域中不能忽略IC组件中的位移效应，而且还可能导致器件故障。