Kelvin-Helmholtz Experiment

Three-dimensional modeling and analysis of a high energy density Kelvin-Helmholtz experiment

“…It was shown that all of the outstanding macroscopic features are, in fact, explained by physical processes already modeled by our codes, when the modeling is done in 3D. This provides a crucial validation of our basic approach as we move forward with this platform to explore uncharted aspects of HED shear flows [5,6]. [2,3], with synthetic x-ray images from (b) 2D CALE and (c) 3D ARES simulations.…”

“…The analysis in Ref. 6 suggests this variability might be due to sensitivity of these features to the surface roughness of the beryllium walls, which was not included in our simulation. The radiograph in Fig.…”

“…The KH experiments were notable for their reproducibility and high quality data, so there is considerable momentum to utilize this platform to investigate other aspects of HED shear flows. A program is currently underway to see how such experiments may be used to calibrate turbulent mix models in the HED regime [5,6]. The present work is part of a parallel effort to refine our model of the basic platform to inform the design of future experiments.…”

Measurement of theT+TNeutron Spectrum Using the National Ignition Facility

“…The spectrum provides information about interactions among final-state particles, while the Tðt; 2nÞ yield extracted from spectral measurements assists efforts to understand thermonuclear environments created in the laboratory. Reaction yields test the modeling of inertial confinement fusion, for example, in experiments designed to measure mixing between the ablator and fuel [8,9]. Also, since the particle spectrum results from three-body decay its sensitivity to different breakup mechanisms has long been of interest [10].…”