Temporal evolution of multi-ion and kinetic effects in DT3He gas-filled shock- and ablatively-driven implosions on OMEGA

Prior research demonstrates an inability of both theory and simulation to adequately predict yields and other key implosion metrics as implosion dynamics become more kinetic. Here, a set of three experiments are compared to establish a timeline for the impact of multi-ion/kinetic effects on a given implosion. Both thin (2.8 um) and thick (6 um) DT3He gas-filled Hoppe glass shells were used, providing shock- and ablatively-driven implosions, respectively. Initial fill densities and laser drive were varied to control the effective Knudsen number and determine the extent to which hydrodynamic or kinetic physics dominated. Each experiment was simulated using both 1D hydrodynamic and multi-ion simulation codes to define the hydrodynamically expected behavior of the capsules under the test conditions. Yields, reaction histories and ion temperatures were then compared to quantify the impact of multi-ion and kinetic physics specifically during the shock-convergence and compression phases of an ICF implosion.