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Five-year results from the engineering radiation monitor and solar cell monitor on the van allen probes mission

机译：范艾伦探测器任务中的工程辐射监测器和太阳能电池监测器取得的五年成果

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摘要

The Engineering Radiation Monitor measures dose, dose rate, and charging currents on the Van Allen Probes mission to study the dynamics of Earth's Van Allen radiation belts. Over 5 years, results from this monitor show a variation in dose rates with time, a correlation between the dosimeter and charging current data, and a comparison of cumulative dose to prelaunch modeling. Solar cell degradation monitor patches track the decrease in solar array output as displacement damage accumulates. The Solar Cell Monitor shows ~33% cumulative degradation in maximum power after 5.1 years of the mission. The desire to extend the mission to ~2,500 days from 800 days created increased requirements for the ionizing radiation hardness of spacecraft and science instrument electronics. We describe the investigations that insured compliance with these enhanced requirements. Key Points The Engineering Radiation Monitor dose and dose rate data versus time and shield depth are summarized The Solar Cell Monitor shows ~33% cumulative degradation in maximum power after 5.1 years of the mission The observatories electronic parts were qualified for a ~800‐day mission; a radiation hardness survey gives a projection exceeding the 2,500‐day extended mission goal.
机译：工程辐射监测器在Van Allen Probes任务中测量剂量，剂量率和充电电流，以研究地球Van Allen辐射带的动力学。在过去的5年中，此监视器的结果显示剂量率随时间变化，剂量计和充电电流数据之间的相关性以及累积剂量与启动前建模的比较。太阳能电池退化监测器补丁跟踪随着位移损伤累积而导致太阳能电池阵列输出的下降。任务执行5.1年后，太阳能电池监控器显示最大功率的累积衰减约为33％。将飞行任务从800天延长至2500天的愿望，对航天器和科学仪器电子设备的电离辐射硬度提出了更高的要求。我们描述了确保符合这些增强要求的调查。关键点总结了工程辐射监测器的剂量和剂量率数据与时间和屏蔽深度的关系太阳能电池监测器显示，在执行任务5.1年后，最大功率的累积衰减约为33％。天文台的电子零件有资格进行约800天的任务;辐射硬度调查得出的预测超出了2500天的扩展任务目标。

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