The Energetic particle detector (EPD) on-board the Galileo orbiter measured ions in the keV to MeV energy range in Jupiter’s equatorial plane, generating a unique data set. However, as a result of its time in the highly hostile Jovian radiation environment the EPD and its composition measurement system (CMS), suffered damage to its silicon semiconductor detectors. This resulted in misidentification of ion species and an underestimation of fluxes. We use in-flight measurements to understand the nature of the damage and how much it has affected the data. A method of mass and energy identification and reallocation was developed to identify and correct affected data thus improving the usability and accuracy of the Jovian data sets. This study aims to calculate the extent of the damage to the main CMS detector, K T $K_{ {T}}$ ; estimating the build-up of a non-sensitive dead layer on its surface. By the end of mission this dead layer has increased and is estimated to top out at 0.35 ± 0.02 $0.35 \pm 0.02$ μm. A corrected set of data is produced, which fits better within expected boundaries, and will be made available for future use.

中文翻译：

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伽利略高能粒子探测器校正，成分测量系统高速率数据：半导体死层校正

伽利略轨道飞行器搭载的高能粒子探测器 (EPD) 测量木星赤道平面 keV 到 MeV 能量范围内的离子，生成独特的数据集。然而，由于长期处于高度敌对的木星辐射环境中，EPD 及其成分测量系统 (CMS) 的硅半导体探测器遭受了损坏。这导致离子种类的错误识别和通量的低估。我们使用飞行测量来了解损坏的性质以及它对数据的影响程度。开发了一种质量和能量识别和重新分配的方法来识别和纠正受影响的数据，从而提高木星数据集的可用性和准确性。本研究旨在计算对主 CMS 探测器 KT $K_{ {T}}$ 的损坏程度；估计其表面上非敏感死层的积聚。到任务结束时，这个死层已经增加，估计最高可达 0.35 ± 0.02 $0.35 \pm 0.02$ μm。生成了一组更正的数据，它更符合预期的边界，并将供将来使用。