Modeling the absorption of intense, short laser pulses in steep density gradients

W. Edward Alley

doi:10.1117/12.46140

1 June 1991 Modeling the absorption of intense, short laser pulses in steep density gradients

W. Edward Alley

Proceedings Volume 1413, Short-Pulse High-Intensity Lasers and Applications; (1991) https://doi.org/10.1117/12.46140
Event: Optics, Electro-Optics, and Laser Applications in Science and Engineering, 1991, Los Angeles, CA, United States

Abstract

A subroutine which calculates the absorption of short pulse electromagnetic radiation in a material has been installed into the laser fusion modeling program called LASNEX. Calculational results show the necessity for NLTE physics to account for ionization, the development of non-exponential density profiles for the expanding plasma and movement of the critical point toward the surface which results in Doppler shifts of the reflected light. Comparison of calculations of local scale lengths with experiments shows not only good agreement but the correct scaling with intensity.

Citation Download Citation

W. Edward Alley "Modeling the absorption of intense, short laser pulses in steep density gradients", Proc. SPIE 1413, Short-Pulse High-Intensity Lasers and Applications, (1 June 1991); https://doi.org/10.1117/12.46140

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