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Investigating Ta strength across multiple platforms strain rates and pressures

Mattsson, Thomas M.; Flicker, Dawn G.; Laros, James H.; Battaile, Corbett C.; Brown, Justin L.; Lane, James M.; Lim, Hojun L.; Arsenlis, Thomas A.; Barton, Nathan R.; Park, Hye-Sook; Swift, Damian C.; Prisbrey, Shon T.; Austin, Ryan; Mcnabb, Dennis P.; Remington, Bruce A.; Prime, Michael B.; III Gray, George T.; Bronkhorst, Curt A.; Shen, Shuh-Rong; Luscher, D.J.; Scharff, Robert J.; Fensin, Sayu J.; Schraad, Mark W.; Dattelbaum, Dana M.; Brown, Staci L.

Abstract not provided.

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TYPE Conference Poster YEAR 2017
OSTI

Magnetically-Driven Convergent Instability Growth platform on Z

Knapp, Patrick K.; Mattsson, Thomas M.; Martin, Matthew; Laros, James H.

Hydrodynamic instability growth is a fundamentally limiting process in many applications. In High Energy Density Physics (HEDP) systems such as inertial confinement fusion implosions and stellar explosions, hydro instabilities can dominate the evolution of the object and largely determine the final state achievable. Of particular interest is the process by which instabilities cause perturbations at a density or material interface to grow nonlinearly, introducing vorticity and eventually causing the two species to mix across the interface. Although quantifying instabilities has been the subject of many investigations in planar geometry, few have been done in converging geometry. During FY17, the team executed six convergent geometry instability experiments. Based on earlier results, the platform was redesigned and improved with respect to load centering at installation making the installation reproducible and development of a new 7.2 keV, Co He-a backlighter system to better penetrate the liner. Together, the improvements yielded significantly improved experimental results. The results in FY17 demonstrate the viability of using experiments on Z to quantify instability growth in cylindrically convergent geometry. Going forward, we will continue the partnership with staff and management at LANL to analyze the past experiments, compare to hydrodynamics growth models, and design future experiments.

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TYPE SAND Report YEAR 2017
DOIOSTIDOIOSTI

A cross-platform comparison of dynamic material strength for tantalum

Flicker, Dawn G.; Prime, Michael; Gray, Gt; Chen, Shuh-Rong; Schraad, Mark; Dattelbaum, Dana; Fensin, Sayu; Preston, Dean; Buttler, W.; Sjue, Sky; Arsenlis, Tom; Park, Hye-Sook; Mcnabb, Dennis; Barton, Nathan; Remington, Bruce; Prisbey, Shon; Austin, Ryan; Swift, Damian; Laros, James H.; Lane, James M.; Brown, Justin L.; Lim, Hojun L.; Battaile, Corbett C.; Mattsson, Thomas M.; Sun, Amy C.; Moore, Alexander M.

Abstract not provided.

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TYPE Conference Poster YEAR 2017
OSTI

Sandia Dynamic Materials Program Strategic Plan

Flicker, Dawn G.; Laros, James H.; Desjarlais, Michael P.; Knudson, Marcus D.; Leifeste, Gordon T.; Lemke, Raymond W.; Mattsson, Thomas M.; Wise, Jack L.

Materials in nuclear and conventional weapons can reach multi-megabar pressures and 1000s of degree temperatures on timescales ranging from microseconds to nanoseconds. Understanding the response of complex materials under these conditions is important for designing and assessing changes to nuclear weapons. In the next few decades, a major concern will be evaluating the behavior of aging materials and remanufactured components. The science to enable the program to underwrite decisions quickly and confidently on use, remanufacturing, and replacement of these materials will be critical to NNSA’s new Stockpile Responsiveness Program. Material response is also important for assessing the risks posed by adversaries or proliferants. Dynamic materials research, which refers to the use of high-speed experiments to produce extreme conditions in matter, is an important part of NNSA’s Stockpile Stewardship Program.

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TYPE Other Report YEAR 2017
DOIOSTI
Results 26–50 of 183
Results 26–50 of 183