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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 hypervelocity impact experiments, it is the most effective way to measure the temperature and density of ultrahigh-velocity microparticles impinging on the plasma through the monitoring of impinging luminescence signals and the basis for further study on the impact-induced discharge effect of tiny space debris. This method has been used by foreign agencies to monitor the plasma impact parameters of the particles above the millimeter, but it is more difficult to monitor the impact of the luminescent signals below the millimeter, and no relevant research has been reported yet.In this paper, plasma-driven micro-fragment accelerator The luminescence signals of super-high-speed impact of 100-micron-sized particles were monitored. The characteristics of luminescence during impinging luminescence signal and impulse-induced discharge were analyzed. The method of measuring the particle velocity by impinging luminescence signal was proposed.