Previously published studies of single shock compressed CH foils. Calculated Hugoniot curve for three-shocked compressed CH capsule. 9–15
The experimental setup to study spherically convergent coalescing shocks in CH capsules; (a) schematic diagram of the target geometry, laser beam configuration, and k-vectors; (b) photo of CH cone-in-half-shell target; (c) 2-D HELIOS simulation of the mass density is shown as a function of CH shell radius and input pulse shape dimensions (TW and time duration) along with shock conditions explained in this study.
Thomson scattering curve fit analysis. Measured scattered spectra (blue) and best fit (red) to the Compton x-ray scatter features from multi-shocked CH ablators at t = 3.4 ns, 3.5 ns, 3.6 ns, and 3.8 ns, yielding ne, Te for ZC = 4.
RMS fit of the full ray Thomson scattered spectrum (inelastic and elastic feature) for CH x-ray scattering data taken at t = 3.4 ns (400 ps after shock coalescence) indicating that single shot data from coalescing shocks provide accurate characterization with 15%–20% error bar.
Calculated Thomson scattering profile calculated with (a) form factor approximation and (b) impulse approximation bound-free models for ionization states of ZC = 2 and ZC = 4.
Direct measurements of the (a) mass density, (b) electron temperature, and (c) electron density, inferred from spectrally resolved x-ray Thomson scattering plotted as a function of time (using bound-free models IA and FFA). Data points are plotted with 2-D hydrodynamic simulation (HYDRA) of multi-shocked compressed CH capsules.
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