超高速撞击实验中，通过对撞击发光信号的监测，利用光谱分析法测量超高速微粒撞击形成等离子体的温度和密度是最有效的方法，也是深入研究微小空间碎片撞击诱发放电效应的基础。国内外相关机构已利用该方法对毫米以上微粒撞击等离子体的参数进行了监测，但是毫米以下微粒撞击发光信号的监测难度更大，相关研究还未见报道。本文在等离子体驱动微小碎片加速器上对百微米级微粒超高速撞击的发光信号进行了监测，对该撞击发光信号以及撞击诱发放电过程中发光的基本特征进行了分析，并提出了利用撞击发光信号对微粒速度进行测量的方法。%In the research of space debris impact induced discharge the measurements of the density and temperature of the impact plasma are very important and difficult. Spectrum analysis is the best method of measuring the density and temperature of hypervelocity impact induced plasma. This method has been successfully used for detecting the density of the plasma produced by hypervelocity particles with diameters larger than 1 mm. In this paper, we present a method of detecting the light flash that is produced by the hypervelocity impact of 200 µm particles which is the foundation for the spectrum analysis method. The characteristics of the light flash of the impact and the impact induced discharge are also discussed.
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