Abstract
The wavelength range of Extreme Ultraviolet (EUV) and x-ray lasers corresponds to strong absorption of photons by direct photoionization. Irradiation by high intensities of photons in this region leads to a rapid drop in the opacity due to a rise in the average degree of ionization of the plasma. A one-dimensional radiation transport model, which considers non-equilibrium conditions, has been used to model this “bleaching” of opacity by a short wavelength laser pulse as it propagates through a target. The effect of rapidly changing plasma conditions on inverse bremsstrahlung is explored.
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The authors would like to acknowledge EPSRC, Laserlab Europe and the Fusion Doctoral Training Network for funding this work. The authors are also grateful to L. J. Easy for computational aid.
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Aslanyan, V., Tallents, G. (2016). Opacity Bleaching by Extreme Ultraviolet Radiation Incident on Solid Density Targets. In: Rocca, J., Menoni, C., Marconi, M. (eds) X-Ray Lasers 2014. Springer Proceedings in Physics, vol 169. Springer, Cham. https://doi.org/10.1007/978-3-319-19521-6_51
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DOI: https://doi.org/10.1007/978-3-319-19521-6_51
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