Radiative Effects on Direct Drive Implosion Temperatures
ORAL
Abstract
We have performed experiments at the Omega Laser Facility to measure time-resolved electron (Te) and ion temperature (Ti) in implosion plasmas. These experiments used direct laser drive on thin glass shells filled with a mixture of D, $^{3}$He, Kr, and Xe, and used neutron and proton emission to diagnose Ti along with x-ray emission to diagnose Te. The Kr dopant serves as an optically-thin tracer for Te measurements via K-shell spectroscopy, while the Xe dopant enhances radiation losses and alters time-dependent temperatures through the shock and compression phases. These experiments are intended to establish an experimental platform for studying the energetics effects of high-Z dopants in hot, dense plasmas, including ignition plasmas at the National Ignition Facility. We describe the experiments and the supporting hydrodynamics simulations.
*This work was performed under the auspices of the U.S. Department of Energy by the University of California Lawrence Livermore National Laboratory under contract No. W-7405-ENG-48.
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