The Ejecta Model for Hypervelocity Impacting on 5A06 Aluminum Sheet

摘要

Ejecta is the new debris produced by micrometeoroid or small space debris impacting on spacecraft surface. It is one of the main increasing sources in the number of space debris. Researching of space debris hypervelocity impacting on the typical material of spacecraft surface could gain the distribution of ejecta and provide a input source for the space debris environment model. In this paper, 2017 aluminum sphere projectiles of 2.4mm and 3.2mm diameter are accelerated to about 2km/s and 3km/s using a two-stage light-gas gun. The data of speed, quality, size for ejecta is analysised by the probability theory of mathematical statistics, then get the speed, quality, size distribution of the ejecta and set up the ejecta model. The average size and velocity of the ejecta increase with increasing of the diameter and velocity of the projectile. The zenith angle of the ejecta is almost between 39 and 47 .