What is it about?
Research on the interaction between lasers and fluids is one of the crucial issues in the development of EUV light sources. Through experiments, we have investigated the process of laser ablation on metal jets, obtaining the relationship between the expansion parameters of the liquid film formed by the bending of the jet after laser ablation and the laser energy and time.
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Why is it important?
Our findings show that the laser pulse disrupts the jet to form a gap, and the length of the gap grows according to a logarithm relationship with respect to the dimensionless time normalized a characteristic timescale, which is determined by the pulse energy. The ablation impulse bends and flattens the jet into a thin curved film that resembles a wind-blown sail. The area of the sail is exponentially related to the pulse energy and time. Additionally, we found that the laser-blast-induced initial bending velocity of the jet could be predicted using the semi-empirical laser ablated propulsion model for an In-Sn droplet of tens of micrometers.
Perspectives
This article represents the first comprehensive set of results obtained by our team using the latest experimental setup. Throughout this endeavor, numerous experimental challenges were addressed, thereby providing crucial support for our subsequent research endeavors.
Yanchu Liu
Southern University of Science and Technology
Read the Original
This page is a summary of: An experimental investigation of the dynamic response of a liquid metal jet subjected to nanosecond laser ablation, Physics of Fluids, January 2024, American Institute of Physics,
DOI: 10.1063/5.0180144.
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