Design of Initial Opacity Platform at the National Ignition Facility
ORAL
Abstract
The absorption and re-emission of x-rays by partly stripped ions plays a critical role in stars and in many laboratory plasmas. A NIF Opacity Platform has been designed to resolve a persistent disagreement between theory and experiments on the Sandia Z facility, studying iron in conditions closely related to the solar radiation-convection transition boundary. A laser heated hohlraum ``oven'' will produce iron plasmas at temperatures \textgreater 150 eV and electron densities $\ge $7x10$^{\mathrm{21}}$/cm$^{\mathrm{3}}$, and be probed with continuum X-rays from a capsule implosion backlighter source. The resulting X-ray transmission spectra will be recorded on a specially designed Opacity Spectrometer.
*This work was performed under the auspices of the U.S. Department of Energy by LLNL under Contract DE-AC52-07NA27344.
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Authors
R. F. Heeter
Lawrence Livermore National Laboratory
Lawrence Livermore National Lab
Lawrence Livermore Natl Lab
LLNL
M.F. Ahmed
Lawrence Livermore National Lab
S.L. Ayers
Lawrence Livermore National Lab
J.A. Emig
Lawrence Livermore National Lab
C.A. Iglesias
Lawrence Livermore National Lab
D.A. Liedahl
Lawrence Livermore National Lab
M.B. Schneider
Lawrence Livermore National Lab
B.G. Wilson
Lawrence Livermore National Lab
E.J. Huffman
National Security Technologies
J.A. King
National Security Technologies
Y.P. Opachich
National Security Technologies
P.W. Ross
National Security Technologies
J.E. Bailey
Sandia National Lab
G.A. Rochau
Sandia National Lab
R.S. Craxton
Univ. of Rochester Laboratory for Laser Energetics
E.M. Garcia
Univ. of Rochester Laboratory for Laser Energetics
P.W. McKenty
Univ. of Rochester Laboratory for Laser Energetics
R. Zhang
Univ. of Rochester Laboratory for Laser Energetics
