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Updated: Jul 2, 2026

Scattering And Absorption of Light in Planetary Regoliths
Published on: July 1, 2019
X-ray scattering measurements of radiative heating and cooling dynamics
G Gregori1, S H Glenzer, K B Fournier
1Lawrence Livermore National Laboratory, University of California, P.O. Box 808, California 94551, USA.
Abstract:
Spectrally and time-resolved x-ray scattering is used to extract the temperature and charge state evolution in a near solid density carbon foam driven by a supersonic soft x-ray heat wave. The measurements show a rapid heating of the foam material (approximately 200 eV/ns) followed by a similarly fast decline in the electron temperature as the foam cools. The results are compared to an analytic power balance model and to results from radiation-hydrodynamics simulations. Finally, the combination of charge state and temperature extracted from this known density isochorically heated plasma is used to distinguish between dense plasma ionization balance models.
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