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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 >Bootstrap Charging on the DSCS Satellite
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Bootstrap Charging on the DSCS Satellite

机译：DSCS卫星上的自举充电

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Charging of surfaces surrounded by larger surfaces on spacecraft requires special treatment. The usual Mott-Langmuir current collection formula does not apply because of the lack of spherical symmetry. It is insufficient to consider the interaction between each surface and the ambient plasma. It is necessary to include the interaction between surfaces. In the bootstrap mechanism, if the surrounding surfaces are at higher negative potentials than that of the surrounded small surface, a local potential well forms above the small surface. The potential well prevents the secondary electrons from leaving the small surface. On the other hand, the secondary electrons from the surrounding surfaces can land on the smaller surface. As a result, the small surface's potential swings negative, approaching an equilibrium potential which equals that of the surrounding surfaces. The time scale of the approach depends on the relative capacitances of the interacting surfaces. The simultaneous measurements of the potentials of two small surfaces and the spacecraft ground surface on DSCS offer an excellent opportunity for studying spacecraft surface interactions in space plasmas. In this paper, we report on the first observation of bootstrap charging in space.
机译：航天器上被较大表面包围的表面需要进行特殊处理。由于缺乏球形对称性，因此通常的Mott-Langmuir电流收集公式不适用。仅考虑每个表面与周围等离子体之间的相互作用是不够的。必须包括表面之间的相互作用。在自举机制中，如果周围表面的负电位高于被包围的小表面的负电位，则在小表面上方会形成局部势阱。势阱可防止二次电子离开较小的表面。另一方面，来自周围表面的二次电子可以降落在较小的表面上。结果，小表面的电势摆动为负，接近等于周围表面的电势的平衡电势。该方法的时间尺度取决于相互作用表面的相对电容。在DSCS上同时测量两个小表面和航天器地面的电势，为研究航天等离子体在空间等离子体中的相互作用提供了极好的机会。在本文中，我们报告了空间中自举电荷的首次观察。

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