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Proceedings Article

On the self-similar solution of laser ablated plasma expansion

[+] Author Affiliations
R. Fermous, M. Djebli

Univ. des Sciences et de la Technologie Houari Boumediene (Algeria)

D. Doumaz

Ctr. de Développement des Technologies Avancées (Algeria)

Proc. SPIE 7996, Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010, 79960V (February 28, 2011); doi:10.1117/12.888920
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From Conference Volume 7996

  • Fundamentals of Laser-Assisted Micro- and Nanotechnologies 2010
  • Vadim P. Veiko; Tigran A. Vartanyan
  • St. Petersburg, Russian Federation | July 05, 2010

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.

© (2010) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
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 (February 28, 2011); doi:10.1117/12.888920; http://dx.doi.org/10.1117/12.888920


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