Abstract
The absorption of 1.06 μ light focused on small C8H8 discs has been measured in the intensity range of 1015 – 1017 W/cm The data confirms the importance of collective plasma effects in determining the absorption of intense light. The measured absorption efficiencies are in the range of 30–40%, and the scattered light has a polarization dependence. The measured absorptions are shown to be inconsistent with classical inverse bremsstrahlung. Both the magnitude of the absorption and the observed polarization dependence of the scattered light are shown to be consistent with recent calculations of light absorption via collective processes. Comparisons are made, and improved models of the light absorption are discussed with reference to the data. In addition, the heated electron energies deduced from the X-ray data are consistent with those expected via collective processes.
Research performed under the auspices of the U.S Energy and Development Administration, Contract No. W-7405-Eng-48.
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Kruer, W.L., Haas, R.A., Mead, W.C., Phillion, D.W., Rupert, V.C. (1977). Collective Behavior in Recent Laser-Plasma Experiments. In: Wilhelmsson, H. (eds) Plasma Physics. Nobel Symposium Committee (1976), vol 36. Springer, Boston, MA. https://doi.org/10.1007/978-1-4757-1571-2_5
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