Abstract Details
Line-shape modeling of K-shell transitions in warm-dense laser-produced plasmas: towards deeper understanding of thin targets
Author: Yitzhak Maron
Requested Type: Oral Only
Submitted: 2009-04-28 01:31:26
Co-authors:
Contact Info:
Weizmann Institute of Science
Weizmann Institute
Rehovot, -- 76100
Israel
Abstract Text:
Modeling of x-ray spectra emitted from a solid-density strongly-coupled plasma
formed in short-duration, high-power laser-matter interactions represent a highly challenging task due to the extreme conditions formed in these experiments. Presented will be a self-consistent
modeling [1] based on collisional-radiative calculations that comprise many different processes and effects, such as satellite formation and blending, Stark broadening, plasma polarization, and self-absorption.
Furthermore, the electrons in such dense plasmas can be partly degenerate; possible effects of this degeneracy are considered.
The modeling has been used in systematic studies of K-shell emission from thin
titanium foils (5 - 25 microns) irradiated by femtosecond high-power laser pulses
at 10^19 - 10^20 W/cm^2. The experiments [2] have been carried at the facilities of LULI (France) and University of Jena (Germany), using a doubly-curved x-ray spectrometer with ultra-high spectral and spatial resolutions. An analysis of the experimental data proves a great utility of the calculations, allowing for inferring radially-resolved bulk plasma temperature from a single-shot measurement. Also, discussed will be a novel technique
allowing for 3D reconstruction of spectral properties of such solid-density plasmas, with preliminary results presented.
Applications are in the broad field of warm dense matter, such as inertial confinement fusion, laser-driven sources of x-ray radiation, and particle accelerators.
[1] E. Stambulchik, V. Bernshtam, L. Weingarten, E. Kroupp, D. Fisher, Y. Maron, U. Zastrau, I. Uschmann, F. Zamponi, E. Foerster, A. Sengebusch, H. Reinholz, G. Roepke, and Yu. Ralchenko. Progress in line-shape modeling of K-shell transitions in warm dense titanium plasmas. J. Phys. A: Math. Gen., 42, 2009. Accepted for publication.
[2] U. Zastrau, E. Stambulchik, A. Sengebusch, P. Audebert, E. Brambrink, R.R. Fustlin, V. Bernshtam, T. Kampfer, M. Koenig, E. Kroupp, R. Loetzsch, Yu.V. Ralchenko, H. Reinholz, G. Roepke, I. Uschmann, Y. Maron, and E. Foerster. Observation of temperature gradients in laser-produced solid-density plasmas. Phys. Rev. E, 2009. in preparation.
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