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Non-equilibrium two-dimensional thermal evolutions in target materials irradiated by femtosecond laser pulse

Published online by Cambridge University Press:  04 November 2013

G. Al-Malkawi  and
A. Hassanein
G. Al-Malkawi*
Affiliation:
Center for Materials under Extreme Environment, School of Nuclear Engineering, Purdue University, West Lafayette, Indiana
A. Hassanein
Affiliation:
Center for Materials under Extreme Environment, School of Nuclear Engineering, Purdue University, West Lafayette, Indiana
*
Address correspondence and reprint requests to: G. Al-Malkawi, Center for Materials under Extreme Environment, School of Nuclear Engineering, Purdue University, West Lafayette, IN 47907. E-mail: [email protected]
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Abstract

Non-equilibrium heat transfer described by a two-step temperature model was developed to study the thermal evolution through target materials irradiated by femtosecond laser pulse. Two-dimensional heat transfer equations were solved numerically. The temperature dependent thermo-physical properties of the electron and the lattice are considered in the model. The Gaussian spatial and temporal distribution of the heat and temperature of the electron and the lattice is presented. The effect of reflectivity, electron — lattice coupling factor, and the spot size was studied using copper targets.

Keywords

Coupling factorFemtosecond laserSpot sizeTwo temperature modelUltrashort
Type
Research Article
Information
Laser and Particle Beams , Volume 32 , Issue 1 , March 2014 , pp. 33 - 39
Copyright
Copyright © Cambridge University Press 2013 

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