Same-Shot X-Ray Thomson Scattering and Streaked Imaging of Radiative Shock Experiments at Omega
ORAL
Abstract
A shock system undergoing radiative cooling is able to form a collapsed layer behind the shock that is significantly denser than the simple strong shock limit would predict. Using a Be pusher to drive a shock in excess of 100 km/s in a xenon-filled shock tube creates such a dense layer, which is preceded down the tube by a radiation-heated precursor region and followed by a downstream layer of expanding Be. In experiments on the OMEGA Laser, streaked x-ray radiography and x-ray Thomson scattering diagnostics were employed. We detail how this diagnostic combination allows for several measurements of the different regions of this system. For each region, x-ray Thomson scattering may provide information on electron temperature, while streaked radiography yields shock velocity and acceleration. These measurements complement previous radiative shock experiments and suggest future directions.
*This work is funded by the NNSA-DS and SC-OFES Joint Program in High-Energy-Density Laboratory Plasmas, by the National Laser User Facility Program in NNSA-DS and by the Predictive Sciences Academic Alliances Program in NNSA-ASC.
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