Affiliations: [a] School of Equipment Engineering, Shenyang Ligong University, Shenyang 110159, Liaoning, China | [b] State Key Laboratory of Explosive Science and Technique, Beijing Institute of Technology, Beijing 100081, China
Abstract: To investigate the light flash intensity and spectral characteristics produced by high-velocity impact on solar array at the same projectile incidence angles and the different impact velocities, the experimental measurements of light flash and the spectral radiant intensity, for 2A12 aluminum projectile high-velocity impact on solar array, have been conducted through an measurement system of optical transient pyrometer, spectral acquirement system and ultra-high speed camera system by using two-stage light gas gun loading system at the different impact velocities and 45∘ incidence angle of the projectile. Experimental results show that the peak values of the light flash intensity is the biggest at the wavelength of 600 nm among the wavelengths of 550 nm, 600 nm, 650 nm and 700 nm during 2A12 aluminum projectile high-velocity impact on solar array at the given experimental conditions. And variations of light flash from the optical transient pyrometer and the photographs acquired by the ultra-high speed camera are synchronous. Meanwhile, the relationships of spectral radiant intensity were given about material’s elemental compositions of the projectile and target with impact velocities in the paper. Spectral signatures created by high-velocity impact can be utilized as the basis for deep space exploration, which can characterize the material’s elemental compositions of the projectile and target.
