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首页> 外文会议>7th Spacecraft Charging Technology Conference 2001: a Spacecraft Charging Odyssey, Apr 23-27, 2001, Noordwijk, the Netherlands >HYPERVELOCITY DEBRIS INITIATED SPACECRAFT DISCHARGING
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HYPERVELOCITY DEBRIS INITIATED SPACECRAFT DISCHARGING

机译：超高速碎片引发的航天飞机排放

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摘要

Results are presented of experiments conducted to determine the nature of the plasma produced by the impact of hypervelocity debris particles on a spaceraft sub-system and the possibility that they could constitute a triggering mechanism for ESD. Hypervelocity impacts produce damage in the form of cratering, ejecta of the solid constituents of the surface, a plasma consisting of the cover glass laminate material and vaporized aluminum from the impacting particle. The morphology of the deposited ejecta and the chemistry of the vapor were determined by scanning electron microscopy and energy dispersive spectroscopy. The vapor products of the ejecta were spread over a rather large area compared to the diameter of the debris particle, as over 90 percent of the 4.0cm by 4.0cm sample was covered with a deposition of the contaminant film. (Subsequent experiments have shown that this film produced a 15 percent loss in light transmission through the solar cell cover glass, over solar wavelengths of interest.) From these finding, it is suggested that hypervelocity debris or micrometeorite impacts on spacecraft with differentially charged surfaces could constitute a mechanism by which electrostatic discharging could be triggered. This mechanism may explain the discharge anomalies noted on spacecraft surfaces, especially those occurring on the day-side of the spacecraft and during geomagnetic quiet times.
机译：给出了确定由超高速碎片颗粒撞击航天器子系统所产生的等离子体的性质的实验结果，以及它们可能构成ESD触发机制的可能性。超高速撞击会产生以下形式的损坏：缩孔，表面固体成分的喷射，由覆盖玻璃层压板材料和撞击颗粒中的汽化铝组成的等离子体。沉积的喷射物的形态和蒸气的化学性质通过扫描电子显微镜和能量色散光谱法确定。与碎片颗粒的直径相比，喷射流的蒸气产物散布在相当大的区域上，因为4.0厘米乘4.0厘米的样本中有90％以上覆盖有污染物膜。 （随后的实验表明，在所关注的太阳波长范围内，该薄膜通过太阳能电池盖玻璃的光传输损失了15％。）根据这些发现，表明超高速碎片或微陨石撞击具有不同电荷表面的航天器可能构成可以触发静电放电的机制。该机制可以解释在航天器表面上注意到的放电异常，特别是在航天器的日间和地磁静默期间发生的异常。

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