WITHDRAWN--Core Temperature and Density Maps of Direct Drive Implosions using Multispectral X-ray Imaging
ORAL
Abstract
We report on the experiments to obtain core temperature and density maps in direct drive implosions performed at the OMEGA laser facility using a multi-monochromatic X-ray imager, consisting of an array of pinholes and a flat multilayer mirror, providing unique multi-spectral images distributed over a wide spectral range. Employing Ar as a dopant in the DD-filled plastic shells produces emission images in the Ar He-$\beta $ and Ly-$\beta $ spectral regions. These images allow the retrieval of temperature and density maps of the imploding core. Using three identical imagers in a quasi-orthogonal line-of-sight geometry we obtain three-dimensional profiles and images of the cores in different temporal intervals. Temperature and density profiles will be presented and compared with earlier works on direct- and indirect-drive. [UCRL-ABS-213695]
*This work was performed under the auspices of the U.S. Department of Energy by University of California, Lawrence Livermore National Laboratory under Contract W-7405-Eng-48, and DOE-NLUF Grant No. DE-FG03-03SF22696 to the University of Nevada, Reno.
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