Interactions between accelerated dust particles and an aerogel target

本实验采用二氧化硅（SiO2）气凝胶作为除尘器。撞击或沉积的灰尘颗粒被困在气凝胶中，在真空排气后它们仍然存在。然后，通过表面分析评估粉尘的捕获角和速度等信息以及颗粒的大小、形状和形态等特性。由于气凝胶中捕获的粉尘量是沉积在硅靶上的粉尘的两倍，因此这种集尘方法对于估计沉积过程是有用的，而不受从高真空水平到大气压力变化的影响。

Silica (SiO2) aerogel has been used as a dust collector in this experiment. Impacting or deposited dust particles are trapped in the aerogel where they remain after the vacuum vent. Then, information of dust transport such as the trapping angle and velocity as well as the particle properties such as size, shape and morphology will be evaluated by surface analysis. Since the amount of dust trapped in the aerogel is two times larger than the dust deposited on an Si target, this dust collection method is useful for estimation of the deposition process without the influence of changing pressure from a high vacuum level to atmosphere.