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Laboratory analogues of Martian electrostatic discharges

机译：火星静电放电的实验室类似物

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摘要

Electrical discharges in Martian analogue materials have previously been generated by agitation of the material in a low-pressure carbon dioxide environment. These results have led to the supposition that lightning is likely on Mars, on the basis that the surface material becomes triboelectrically charged, and the charges are then gravitationally separated in dust storms. We have reproduced one of these experiments and find that triboelectric charging of the Martian regolith simulant by the walls of the vessel used can adequately explain all the effects observed. Our results indicate that unless special care is taken to avoid wall effects, the electrostatic properties of a laboratory system cannot be extrapolated to the Martian environment. We also note that charging of the outside of the vessel used can generate transients within the vessel which could be mistaken for electrical discharge signals, unless accompanied by optical emissions.
机译：火星模拟材料中的放电以前是通过在低压二氧化碳环境中搅拌该材料而产生的。这些结果导致了这样的假设，即火星很可能在火星上发生闪电，这是因为表面物质被摩擦带电，然后电荷在沙尘暴中被重力分离。我们复制了这些实验之一，并发现所用容器壁对火星雷戈石模拟物的摩擦带电可以充分解释所观察到的所有影响。我们的结果表明，除非特别注意避免壁效应，否则实验室系统的静电特性无法外推到火星环境。我们还注意到，所用容器外部的充电会在容器内产生瞬变，除非将其伴有光发射，否则该瞬变可能被误认为是放电信号。

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  • 来源
    《Planetary and space science》 |2012年第1期|p.100-104|共5页
  • 作者

    K.L Aplin; T. Goodman; K.L. Herpoldt; C.J. Davis;

  • 作者单位

    Physics Department, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK,RAL Space, Science and Technology Facilities Council, Harwell, Didcot, Oxon 0X11 OQX, UK;

    Physics Department, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK;

    Physics Department, University of Oxford, Denys Wilkinson Building, Keble Road, Oxford OX1 3RH, UK,RAL Space, Science and Technology Facilities Council, Harwell, Didcot, Oxon 0X11 OQX, UK Department of Materials, Imperial College London, Exhibition Road, SW7 2AZ London, UK;

    RAL Space, Science and Technology Facilities Council, Harwell, Didcot, Oxon 0X11 OQX, UK,Department of Meteorology, University of Reading, PO Box 243, Earley Gate, Reading RG6 6BB, UK;

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  • 正文语种 eng
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  • 关键词

    mars; lightning; laboratory experiments; charging; dust; atmospheric electricity; triboelectrification;

    机译：火星;闪电;实验室实验;充电;灰尘;大气电力;摩擦带电;

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