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Investigating laser ablated plume dynamics of carbon and aluminum targets

Authors :
Mikhail Finko
Jonathan C. Crowhurst
Wesley J. Keller
Aric C. Rousso
Sonny S. Ly
David G. Weisz
Davide Curreli
Harry B. Radousky
Kim B. Knight
Source :
Physics of Plasmas. 29:083506
Publication Year :
2022
Publisher :
AIP Publishing, 2022.

Abstract

Recently acquired high-resolution images of nanosecond laser ablation plumes suggest a strong correlation between the internal plume structure and the type of material being ablated. However, the details of this relation are currently not well understood. In this work, we attempt to explore this correlation using a 2D radiation hydrodynamics model to study the dependence of internal plume structure formation on the ablation material. Spatio-temporal emission maps and plume expansion velocities from experimental measurements are compared with the model predictions, including synthetic emission maps. The shape and expansion rate of an outer air plume region are found to be in good agreement for both carbon and aluminum, as are the inner material plume dynamics for carbon ablation. The largest disagreement is observed in the case of a polished aluminum target, where the chaotic inner plume features seen in the experimental images are not observed in the model. The possible physical mechanisms responsible for this discrepancy are discussed. This effort constitutes a continued development toward a predictive model of ablation plume dynamics and chemistry for various materials in extreme environments.

Subjects

Subjects :
Condensed Matter Physics

Details

ISSN :
10897674 and 1070664X
Volume :
29
Database :
OpenAIRE
Journal :
Physics of Plasmas
Accession number :
edsair.doi...........cc5bde27b0cb93d2b50d227116ccdf81
Full Text :
https://doi.org/10.1063/5.0099167