X-Ray Scattering Measurements of Radiative Heating and Cooling Dynamics

G. Gregori, S. H. Glenzer, K. B. Fournier, K. M. Campbell, E. L. Dewald, O. S. Jones, J. H. Hammer, S. B. Hansen, R. J. Wallace, and O. L. Landen

Phys. Rev. Lett. 101, 045003 – Published 24 July 2008

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 ( $\sim 200 eV / ns$ ) 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.

Received 4 November 2005

DOI:https://doi.org/10.1103/PhysRevLett.101.045003

Authors & Affiliations

G. Gregori

Lawrence Livermore National Laboratory, University of California, P.O. Box 808, California 94551, USA
Clarendon Laboratory, University of Oxford, OX1 3PU, United Kingdom

S. H. Glenzer, K. B. Fournier, K. M. Campbell, E. L. Dewald, O. S. Jones, J. H. Hammer, S. B. Hansen, R. J. Wallace, and O. L. Landen