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Effects of Radiation Damage on Polyimide Resistivity

机译：辐射损伤对聚酰亚胺电阻率的影响

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摘要

How dielectric materials collect and store electrical charge is critical to spacecraft construction and operational anomaly resolution. Electrical conduction, and thus spacecraft potential, is known to change as materials are damaged by the space environment. However, the exact extent and nature of the aging is unknown and this dynamic aging is a major impediment to the modeling of a spacecraft's behavior over its mission life. Here, an investigation is presented of the alteration of electrical conduction and chemistry composition of polyimide films after controlled radiation damage caused by exposure to 90keV electrons. The conductivity of polyimide is found to increase dramatically (several orders of magnitude) with increased electron exposure. X-ray photoelectron spectroscopy suggests emission of carbon monoxide and carbon dioxide from the polymer at a low electron dose and loss of unsaturated hydrocarbons as the dose increases. No correlation is found between the composition of the surface and the electrical conductivity, indicating that many different damage states are playing a role in the increased conductivity.
机译：介电材料如何收集和存储电荷对于航天器的构造和运行异常的解决至关重要。众所周知，随着材料受到太空环境的破坏，导电性以及太空飞船的电势会发生变化。但是，老化的确切程度和性质尚不得而知，这种动态老化是航天器在其任务寿命内行为建模的主要障碍。在此，对暴露于90keV电子引起的受控辐射损伤后聚酰亚胺薄膜的电导率和化学成分的变化进行了研究。发现随着电子暴露的增加，聚酰亚胺的电导率急剧增加（几个数量级）。 X射线光电子能谱表明在低电子剂量下从聚合物中排放一氧化碳和二氧化碳，并随着剂量的增加而损失不饱和烃。在表面的组成和电导率之间未发现相关性，表明许多不同的破坏状态在电导率增加中起作用。

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  • 来源
    《Journal of Spacecraft and Rockets》 |2017年第2期|343-348|共6页
  • 作者

    Cooper Russell; Ferguson Dale; Engelhart Daniel P.; Hoffmann Ryan;

  • 作者单位

    US Air Force Res Lab, Albuquerque, NM 87117 USA;

    US Air Force Res Lab, Albuquerque, NM 87117 USA;

    US Air Force Res Lab, Albuquerque, NM 87117 USA;

    US Air Force Res Lab, Albuquerque, NM 87117 USA;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
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