Impulse coupling performance of laser ablation GAP in vacuum environment

Dong dong Cao; Zhi guo Dou; Ji fei Ye

doi:10.1117/12.2524625

10 May 2019 Impulse coupling performance of laser ablation GAP in vacuum environment

Dong dong Cao, Zhi guo Dou, Ji fei Ye

Proceedings Volume 11068, Second Symposium on Novel Technology of X-Ray Imaging; 110681S (2019) https://doi.org/10.1117/12.2524625
Event: Second Symposium on Novel Technology of X-Ray Imaging, 2018, Hefei, China

Abstract

Energetic working fluid polyazide glycidyl GAP, has attracted more and more attention in the field of laser ablation micro thruster^[1-3] because it can not only absorb and utilize laser energy, but also fully release its chemical energy and participate in the process of impulse formation. In order to explore the impulse coupling characteristics of solid GAP in vacuum environment, infrared dyes with different mass fraction were doped as absorbent. In a vacuum chamber with a pressure of 30 Pa, a 1064 nm Nd: YAG laser was used to test different laser energy modes (transmissive and reflective) for different thicknesses and different doping concentrations at different laser energy densities. The results show that the doped infrared dye can not significantly change the absorption threshold of laser energy by GAP, but significantly increases the deposition of laser energy in GAP. The doping concentration has a great effect on the coupling performance of the pumping amount within a certain concentration range. When the doping concentration is 5%, the momentum coupling performance of laser ablation GAP is optimal. The thickness of the GAP with the best impulse coupling performance is related to the doping concentration. The higher the concentration, the smaller the thickness of the GAP with the best ablation performance. When doped with infrared dye, GAP exhibits the body absorption characteristic of laser energy, which follows the injection mechanism of “first absorbing laser energy first injection”, so the reflective ablation mode exhibits better propulsion performance.

Citation Download Citation

Dong dong Cao, Zhi guo Dou, and Ji fei Ye "Impulse coupling performance of laser ablation GAP in vacuum environment", Proc. SPIE 11068, Second Symposium on Novel Technology of X-Ray Imaging, 110681S (10 May 2019); https://doi.org/10.1117/12.2524625

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