On the self-similar solution of laser ablated plasma expansion

R. Fermous; D. Doumaz; M. Djebli

doi:10.1117/12.888920

28 February 2011 On the self-similar solution of laser ablated plasma expansion

R. Fermous, D. Doumaz, M. Djebli

Proceedings Volume 7996, Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010; 79960V (2011) https://doi.org/10.1117/12.888920
Event: Fundamentals of Laser Assisted Micro- and Nanotechnologies 2010, 2010, St. Petersburg, Russian Federation

Abstract

The expansion of plasma plume produced by a laser ablation is investigated using the self-similar approach. Based on the fluid model and the quasi-neutral assumption, the one dimensional expansion of an either vapor or partially ionized gas is studied for a collisionless plasma in the presence of electrons in thermal equilibrium. The uniqueness of the self-similar solution is questioned. Two different self-similar transformations for the ion density are proposed, one commonly used for free plasma expansion and the other corresponds to the expansion with diffusion. The density profiles and the self-similar parameter limit, corresponding to the end of the expansion, are found to be strongly affected by the transformation. A comparison is made with experimental results of a plasma produced by nanosecond laser pulse interacting with a metallic titanium target in a vacuum.

Citation Download Citation

R. Fermous, D. Doumaz, and M. Djebli "On the self-similar solution of laser ablated plasma expansion", Proc. SPIE 7996, Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010, 79960V (28 February 2011); https://doi.org/10.1117/12.888920

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