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Heating in ultraintense laser-induced shock waves

Published online by Cambridge University Press:  03 April 2017

Shalom Eliezer ,
Shirly Vinikman Pinhasi ,
José Maria Martinez Val ,
Erez Raicher  and
Zohar Henis
Shalom Eliezer
Affiliation:
Nuclear Fusion Institute, Polytechnic University of Madrid, Madrid, Spain
Shirly Vinikman Pinhasi
Affiliation:
Private Residence, Rehov Beeri 62, Rehovot, Israel
José Maria Martinez Val
Affiliation:
Nuclear Fusion Institute, Polytechnic University of Madrid, Madrid, Spain
Erez Raicher
Affiliation:
Applied Physics Division, Soreq NRC, Yavne, Israel Racah Institute of Physics, Hebrew University, Jerusalem, Israel
Zohar Henis*
Affiliation:
Applied Physics Division, Soreq NRC, Yavne, Israel
*
Address correspondence and reprint requests to: Z. Henis, E-mail: ZoharHenis@gmail.com
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Abstract

This paper considers the heating of a target in a shock wave created in a planar geometry by the ponderomotive force induced by a short laser pulse with intensity higher than 1018 W/cm2. The shock parameters were calculated using the relativistic Rankine–Hugoniot equations coupled to a laser piston model. The temperatures of the electrons and the ions were calculated as a function of time by using the energy conservation separately for ions and electrons. These equations are supplemented by the ideal gas equations of state (with one or three degrees of freedom) separately for ions and electrons. The efficiency of the transition of the work done by the laser piston into internal thermal energy is calculated in the context of the Hugoniot equations by taking into account the binary collisions during the shock wave formation from the target initial condition to the compressed domain. It is shown that for each laser intensity there is threshold pulse duration for the formation of a shock wave. The explicit calculations are done for an aluminum target.

Keywords

Intense lasersLaser piston modelShock waves
Type
Research Article
Information
Laser and Particle Beams , Volume 35 , Issue 2 , June 2017 , pp. 304 - 312
Copyright
Copyright © Cambridge University Press 2017 

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References

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