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Laboratory testing and data analysis of the Electrostatic Lunar Dust Analyzer (ELDA) instrument

机译:静电月尘分析仪(ELDA)仪器的实验室测试和数据分析

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摘要

We report the advance development of the Electrostatic Lunar Dust Analyzer (ELDA) instrument for the detection of individual low-velocity micron-size dust particles mobilized near the lunar surface, and the measurement of the dust charge, velocity vector, and mass. The first article (N. Duncan et al., Planet. Space Sci., 2011) described the measurement principle, optimized instrument geometry, and the initial testing performed on air. The full laboratory prototype of ELDA has now been completed and tested under vacuum. The numerical data analysis is improved to include gravitation and the calculation of the particle's mass. The ELDA operation principle is based on sensing a charged dust particle by an array of wire electrodes as it is passing though the instrument. Each wire electrode is connected to a charge sensitive amplifier and the velocity vector is reconstructed from the signal shapes and amplitudes. Within the instrument, a strong electrostatic field is used to deflect the trajectories of the particles. The dust mass is determined from the change in velocity measured before and after deflection. The instrument is tested using particles with 54 μrn mean radius and a narrow size distribution. The experimental results and the error analyses show that ELDA can measure the mass of individual particle with a factor of two even for very low signal to noise ratio.
机译:我们报告了静电月尘分析仪(ELDA)仪器的先进发展,该仪器用于检测在月球表面附近移动的单个低速微米级尘埃颗粒,并测量尘埃电荷,速度矢量和质量。第一篇文章(N. Duncan等人,Planet。Space Sci。,2011)描述了测量原理,优化的仪器几何形状以及在空气中进行的初始测试。 ELDA的完整实验室原型现已完成,并在真空下进行了测试。改进了数值数据分析,以包括重力和粒子质量的计算。 ELDA的工作原理是基于当金属丝穿过仪器时,通过电极丝阵列检测带电的粉尘颗粒。每个线电极都连接到一个电荷感应放大器,并且根据信号形状和幅度重建速度矢量。在仪器内部,强静电场用于偏转粒子的轨迹。灰尘质量是根据偏转前后测得的速度变化确定的。使用平均半径为54μm且粒径分布较窄的颗粒对仪器进行测试。实验结果和误差分析表明,即使对于非常低的信噪比,ELDA仍可以测量两倍的单个粒子质量。

著录项

  • 来源
    《Planetary and space science》 |2013年第12期|63-70|共8页
  • 作者单位

    Colorado Center for Lunar Dust and Atmospheric Studies, University of Colorado, Boulder, CO 80303, USA ,Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies, University of Colorado, Boulder, CO 80303, USA ,Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA ,Department of Aerospace Engineering Sciences, University of Colorado, Boulder, CO 80309, USA;

    A&M Associates, 421, Basye, VA 22810, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies, University of Colorado, Boulder, CO 80303, USA ,Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies, University of Colorado, Boulder, CO 80303, USA ,Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies, University of Colorado, Boulder, CO 80303, USA ,Laboratory for Atmospheric and Space Physics, University of Colorado, Boulder, CO 80303, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies, University of Colorado, Boulder, CO 80303, USA;

    Max-Planck-Institutes for Nuclear Physics, Heidelberg 69029, Germany ,Institute of Space Systems, University of Stuttgart, Stuttgart 70569, Germany;

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

    Moon dust; Mass measurement; Charge induction; Trajectory sensor;

    机译:月尘;质量测量电荷感应;轨迹传感器;

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