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Lunar surface electric potential changes associated with traversals through the Earth's foreshock

机译：与穿越地球前震的穿越相关的月球表面电势变化

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摘要

We report an analysis of one year of Suprathermal Ion Detector Experiment (SIDE) Total Ion Detector (TID) "resonance" events observed between January 1972 and January 1973. The study includes only those events during which upstream solar wind conditions were readily available. The analysis shows that these events are associated with lunar traversals through the dawn flank of the terrestrial magnetospheric bow shock. We propose that the events result from an increase in lunar surface electric potential effected by secondary electron emission due to primary electrons in the Earth's foreshock region (although primary ions may play a role as well). This work establishes (1) the lunar surface potential changes as the Moon moves through the terrestrial bow shock, (2) the lunar surface achieves potentials in the upstream foreshock region that differ from those in the downstream magnetosheath region, (3) these differences can be explained by the presence of energetic electron beams in the upstream foreshock region and (4) if this explanation is correct, the location of the Moon with respect to the terrestrial bow shock influences lunar surface potential.
机译：我们报告了对在1972年1月至1973年1月之间观察到的超热离子检测器实验（SIDE）总离子检测器（TID）“共振”事件的分析。该研究仅包括那些容易获得上游太阳风条件的事件。分析表明，这些事件与通过地球磁层弓激波的黎明侧面穿越月球有关。我们认为，这些事件是由于地球前震区域中的一次电子（由于一次离子也可能起一定作用）而导致的二次电子发射所引起的月球表面电势增加引起的。这项工作建立了（1）月球表面电位随着月球移动通过地面弓激波而变化的情况;（2）月球表面在上游前震区中实现的电位不同于下游磁石场中的电位，（3）这些差异可以可以通过上游前震区中高能电子束的存在来解释，并且（4）如果这种解释是正确的，那么月球相对于地面弓震动的位置会影响月球表面电势。

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  • 来源
    《Planetary and space science》 |2011年第14期|p.1727-1743|共17页
  • 作者

    Michael R. Collier; H. Kent Hills; Timothy J. Stubbs; Jasper S. Halekas; Gregory T. Delory; Jared Espley; William M. Farrell; John W. Freeman; Richard Vondrak;

  • 作者单位

    NASA/Coddard Space Flight Center, Creenbelt, MD, USA,NASA's Lunar Science Institute, NASA Ames Research Center, Moffett Field, CA 94035, USA;

    NASA/Coddard Space Flight Center, Creenbelt, MD, USA,Adnet Systems, Inc., Lanham, MD, USA;

    NASA/Coddard Space Flight Center, Creenbelt, MD, USA,Coddard Earth Sciences and Technology Center, University of Maryland, Baltimore County, USA,NASA's Lunar Science Institute, NASA Ames Research Center, Moffett Field, CA 94035, USA;

    Space Sciences Laboratory, University of California, Berkeley, CA, USA,NASA's Lunar Science Institute, NASA Ames Research Center, Moffett Field, CA 94035, USA;

    NASA/Coddard Space Flight Center, Creenbelt, MD, USA,NASA's Lunar Science Institute, NASA Ames Research Center, Moffett Field, CA 94035, USA;

    NASA/Coddard Space Flight Center, Creenbelt, MD, USA;

    NASA/Coddard Space Flight Center, Creenbelt, MD, USA,NASA's Lunar Science Institute, NASA Ames Research Center, Moffett Field, CA 94035, USA;

    Department of Physics and Astronomy, Rice University, Houston, TX 77005, USA;

    NASA/Coddard Space Flight Center, Creenbelt, MD, USA,NASA's Lunar Science Institute, NASA Ames Research Center, Moffett Field, CA 94035, USA;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    moon; lunar surface potential; bow shock; foreshock; secondary electron emission;

    机译：月球;月球表面电势;弓形冲击;前震;二次电子发射;

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