Abstract
Three kinds of Al flyer plates with different nanostructured absorption layers were in situ prepared by a direct laser writing technology to improve the energy conversion efficiency in a laser-driven flyer assembly. Microstructures, light absorption, and flyer velocity in the acceleration chamber were investigated. The reflectance for the flyers at 1064-nm wavelength can be reduced from 81.3 to 9.8% by the nanostructured absorption layer. The terminal velocity of a 50-μm-thick Al flyer irradiated by a 60-mJ laser pulse is 831 m/s, while the velocity of the flyer with an in situ-fabricated nano-absorption layer reaches up to 1113 m/s at the same condition. Resultantly, the energy conversion efficiency of the flyer with a nanostructure absorption layer can reach as high as 1.99 times that of the Al flyer. Therefore, the nanostructured absorption layer in situ prepared on the surface of a flyer provides a new method to significantly improve the energy conversion efficiency of a laser-driven flyer.
Highlights
Laser-driven flyer (LDF) used for detonating explosives offers a promising approach to well-controlled, shortpulse shock compression of condensed phase materials [1–4]
We propose a nanostructured aluminum absorption layer in situ prepared on the surface of thin Al flyers to improve the laser absorption and energy conversion efficiency
Nanostructured absorption layers were successfully in situ prepared on the surface of thin Al foils by direct laser writing technology
Summary
Laser-driven flyer (LDF) used for detonating explosives offers a promising approach to well-controlled, shortpulse shock compression of condensed phase materials [1–4]. Considering the energy conversion efficiency could be improved by introducing a layer with stronger absorption at the incident laser wavelength due to decreased reflection [7], many materials with lower reflectivity compared to pure aluminum have been studied as the absorption layer. A single coat of black paint has been applied as the absorption layer of the flyer, but the velocity was not obviously improved. Since these low reflective materials serve as an absorption and an ablation layer, while the interaction material efficiency depends on both the
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
