CAST激光驱动微小飞片及其超高速撞击效应研究进展

激光驱动飞片技术(LDFT)在模拟微米级空间碎片对航天器的超高速撞击效应方面具有独特的优势。文章全面介绍了北京卫星环境工程研究所在激光驱动飞片技术与微米级空间碎片超高速撞击效应地面模拟研究中取得的若干进展,包括激光驱动飞片的理论计算、超高速飞片的稳定发射技术、超高速飞片速度瞬态测量技术、航天器外露表面的超高速撞击特性、超高速撞击累积损伤评价方法,以及微米级空间碎片超高速撞击防护技术探索等研究。同时,展望了激光驱动飞片技术以及微米级空间碎片累积撞击实验研究的发展方向。

Recent progresses of laser-driven flyer technique and micro-space debris hypervelocity impact tests in China Academy of Space Technology

The laser-driven flyer technique (LDFT) has many advantages in simulating the micro-space debris hypervelocity impact. This paper reviews recent progresses in the laser-driven flyer system for space debris hypervelocity impact simulations conducted in CAST, including: 1) the theoretical analysis of the flyer velocity based on the Lawrence Model; 2) a new kind of velocity in-situ measurement technology developed for the laser-driven flyer system; 3) the flyers accelerated up to 8km/s with good repeatability using two-layer targets; 4) hypervelocity impact experiments of micro-space debris for spacecraft surface materials, and the degradation laws of material functional performance; 5) the cumulative damage evaluation method is studied; 6) the diamond-like carbon (DLC) film employed to protect the optical materials against micro-space debris impact. At last, the new trend of laser-driven flyer hypervelocity impact research is discussed.