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首页> 外文期刊>Planetary and space science >On the application of a linear time-of-flight mass spectrometer for the investigation of hypervelocity impacts of micron and sub-micron sized dust particles
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On the application of a linear time-of-flight mass spectrometer for the investigation of hypervelocity impacts of micron and sub-micron sized dust particles

机译:线性飞行时间质谱仪在研究微米级和亚微米级灰尘颗粒的超高速撞击中的应用

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摘要

Impact physics plays an important role in a variety of fields such as investigation of matter at extreme pressures and temperatures, shock waves in solid bodies or planetology and cosmic dust research. The processes of interest are the generation of impact plasma, neutrals, secondary ejecta, and electromagnetic (EM) radiation. The generation of charge during impacts provides one of the most sensitive methods for the detection and characterization of dust particles in space. To relate the measured values resulting from hypervelocity impact experiments with the impact parameters (speed, mass, composition) a comprehensive set of experiments is needed with well known experimental conditions, and a wide variety of diagnostic tools. For such experiments dust particles are accelerated to hypervelocity speeds in the laboratory with an electrostatic accelerator. In the present contribution, linear time-of flight (TOF) mass spectrometry is used to investigate the thermodynamical properties, e.g. the velocity distribution, of the ions within an impact plasma. Furthermore, the dependence of the plasma properties on the impact parameters is studied for different dust and target material combinations to investigate the constraints for the validity of impact ionization models. These studies provide new insights into the physics of hypervelocity impacts and the short timescale high-pressure states of matter, they also lead to the development of new and optimization of existing instrument concepts for the detection and characterization of cosmic dust in space.
机译:冲击物理学在许多领域都发挥着重要作用,例如在极压和极高温度下进行物质调查,固体或行星学中的冲击波以及宇宙尘埃研究。感兴趣的过程是撞击等离子体,中性点,二次喷射和电磁(EM)辐射的产生。撞击过程中产生的电荷为检测和表征空间中的尘埃颗粒提供了最灵敏的方法之一。为了将超高速冲击实验产生的测量值与冲击参数(速度,质量,组成)相关联,需要使用众所周知的实验条件和多种诊断工具进行全面的实验。对于此类实验,在实验室中使用静电加速器将灰尘颗粒加速到超高速速度。在本发明中,线性飞行时间(TOF)质谱法用于研究热力学性质,例如热力学。碰撞等离子体中离子的速度分布。此外,研究了等离子体特性对不同粉尘和目标材料组合的碰撞参数的依赖性,以研究碰撞电离模型有效性的约束条件。这些研究为超高速撞击和短时间尺度的物质高压状态的物理学提供了新的见解,它们还导致了新的研究和对现有仪器概念的优化,用于探测和表征太空中的宇宙尘埃。

著录项

  • 来源
    《Planetary and space science》 |2013年第12期|47-57|共11页
  • 作者单位

    Colorado Center for Lunar Dust and Atmospheric Studies. University of Colorado, Boulder, CO 80303, USA ,IRS, Universitat Stuttgart, Pfaffenwaldring 29, D-70569 Stuttgart, Germany ,LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303, USA;

    Dept. of Aerospace Engineering, Universitaet der Bundeswehr Muenchen, Werner-Heisenberg-Weg 39, D-85577 Neubiberg, Germany;

    LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303, USA ,MPI fuer Kemphysik. Saupfercheckweg I D-69U7 Heidelberg, Germany;

    Colorado Center for Lunar Dust and Atmospheric Studies. University of Colorado, Boulder, CO 80303, USA ,LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies. University of Colorado, Boulder, CO 80303, USA ,LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies. University of Colorado, Boulder, CO 80303, USA ,LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies. University of Colorado, Boulder, CO 80303, USA ,LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies. University of Colorado, Boulder, CO 80303, USA ,LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies. University of Colorado, Boulder, CO 80303, USA ,Dept. of Aerospace Engineering Sciences, University of Colorado, Boulder, USA;

    Colorado Center for Lunar Dust and Atmospheric Studies. University of Colorado, Boulder, CO 80303, USA ,Dept. of Aerospace Engineering Sciences, University of Colorado, Boulder, USA ,LASP, University of Colorado, 1234 Innovation Drive, Boulder, CO 80303, USA;

    IRS, Universitat Stuttgart, Pfaffenwaldring 29, D-70569 Stuttgart, Germany ,MPI fuer Kemphysik. Saupfercheckweg I D-69U7 Heidelberg, Germany;

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

    Cosmic dust; Impact ionization; Hypervelocity impacts of micrometeorites;

    机译:宇宙尘埃;碰撞电离;微陨石的超高速影响;

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