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13 September 2005 Hot dense plasma opacity measurements using x-ray lasers
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Experimental measurements of the opacity of plasmas at densities close to solid state and temperatures ~ 60 - 300 eV using a probing X-ray laser are presented. Utilizing thin targets, opacities of iron have been measured using x-ray lasers of photon energy 89 eV created by pumping with the VULCAN RAL laser. The thin targets are separately heated by spot focus laser pulses. We have demonstrated that X-ray laser brightness is sufficient to overcome the self-emission of hot plasma so that useful opacity measurements can be made. Due to their high brightness, x-ray lasers can fulfill a useful niche in measuring opacity and other phenomena associated with laser-plasma interactions. Quantities such as opacity measured in laser-plasmas are useful elsewhere. For example, plasma opacity is important in understanding radiative transfer in the sun.
© (2005) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
G. J. Tallents, M. H. Edwards, P. Mistry, D. S. Whittaker, N. Booth, G. J. Pert, B. Rus, T. Mocek, M. Kozlova, C. L. S. Lewis, C. McKenna, A. Delseriey, M. Notley, and D. Neely "Hot dense plasma opacity measurements using x-ray lasers", Proc. SPIE 5919, Soft X-Ray Lasers and Applications VI, 59190G (13 September 2005);

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