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首页> 外文期刊>Journal of Spacecraft and Rockets >Low-Energy Electron Exposure of Space Materials
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Low-Energy Electron Exposure of Space Materials

机译：太空材料的低能电子暴露

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A laboratory test, which exposed a variety of spacecraft thermal control and optical materials to low-energy (500 eV) electron radiation, was performed to investigate the response of these materials to electrons with energies below 1 keV. The potential importance of these low-energy electrons is exemplified by the fact that current environment models indicate as much as 30-40% of the geosynchronous electron environment is composed of electrons with kinetic energy of less than 1 keV. There exist recently published geosynchronous-Earth-orbit flight data for electron energies down to approximately 40 eV, which now allows for enhancement of the limited and outdated, but still commonly used, space environment model AE8. Some limitations of prevailing particulate radiation transport codes also exist, as many are often unable to make reliable predictions for particle energies below 1 keV. The presented test data demonstrate that measurable changes result in several space materials from exposure to high fluences of 500 eV electrons. The material changes are compared with prior tests results and shown to be a significant fraction of changes induced by orbital and multi-energy-electron exposures.
机译：进行了一项实验室测试，该测试将各种航天器的热控制和光学材料暴露于低能（500 eV）电子辐射下，以研究这些材料对能量低于1 keV的电子的响应。当前环境模型表明多达30-40％的地球同步电子环境由动能小于1 keV的电子组成，说明了这些低能电子的潜在重要性。最近有公开的地球同步地球轨道飞行数据，其电子能量低至大约40 eV，现在可以增强有限和过时但仍常用的空间环境模型AE8。还存在主要粒子辐射传输代码的一些限制，因为许多限制通常无法对1 keV以下的粒子能量做出可靠的预测。呈现的测试数据表明，可测量的变化导致多种空间材料因暴露于500 eV电子的高通量而产生。将该材料的变化与先前的测试结果进行了比较，结果表明这是轨道和多能量电子暴露引起的变化的很大一部分。

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