Sensitivity of rocky planet structures to the equation of state (2009)
Structures were calculated for Mercury, Venus, Earth, the Moon, and Mars, using a core-mantle model and adjusting the core radius to reproduce the observed mass and diameter of each body. Structures...
Approximate, analytic solutions of the Bethe equation for charged particle range (2009)
Swift, Damian C., McNaney, James M.
By either performing a Taylor expansion or making a polynomial approximation, the Bethe equation for charged particle stopping power in matter can be integrated analytically to obtain the range of...
TEMPERATURE-BASED REACTIVE FLOW MODEL FOR ANFO (2008)
Roberta N. Mulford, Damian C. Swift, Martin Braithwaite
Reaction rates depend on temperature as well as on the mechanical state. In shock wave initiation, experimental data almost always comprise mechanical measurements such as shock speed, material...
In inertial confinement fusion (ICF) (Lindl 1998), thermonuclear reactions are induced by compressing the fuel dynamically, through an implosion. This leads to the high compressions and temperatures...
TEMPERATURE-BASED REACTIVE FLOW MODEL FOR ANFO (2008)
Roberta N. Mulford, Damian C. Swift, Martin Braithwaite
Reaction rates depend on temperature as well as on the mechanical state. In shock wave initiation, experimental data almost always comprise mechanical measurements such as shock speed, material...
Shock formation and the ideal shape of ramp compression waves (2008)
Swift, Damian C., Kraus, Richard G., Loomis, Eric, Hicks, Damien G., McNaney, James M., Johnson, Randall P.
We derive expressions for shock formation based on the local curvature of the flow characteristics during dynamic compression. Given a specific ramp adiabat, calculated for instance from the equation...
Crystal Plasticity for Dynamic Loading at High Pressures and Strains (2007)
Swift, Damian C., Loomis, Eric N., Peralta, Pedro, El-Dasher, Bassem
A crystal plasticity theory was developed for use in simulations of dynamic loading at high pressures and strain rates. At pressures of the order of the bulk modulus, compressions o(100%) may be...
On the Properties of Plastic Ablators in Laser-Driven Material Dynamics Experiments (2007)
Swift, Damian C., Kraus, Richard G.
Radiation hydrodynamics simulations were used to study the effect of plastic ablators in laser-driven shock experiments. The sensitivity to composition and equation of state was found to be 5-10% in...
Pyrometric Measurement of the Temperature of Shocked Molybdenum (2007)
Seifter, Achim, Swift, Damian C.
Measurements of the temperature of Mo shocked to ~60 GPa and then released to ~28 GPa were previously attempted using high explosive driven flyer plates and pyrometry. Analysis of the radiance traces...
Dynamic plasticity of beryllium in the inertial fuel fusion capsule regime (2007)
Swift, Damian C., Tierney, Thomas E., Luo, Sheng-Nian, Mulford, Roberta N., Kyrala, George A., Johnson, Randall P., ...
The plastic response of beryllium was investigated during loading by laser-induced shock waves, using surface velocimetry and in-situ x-ray diffraction. Results from loading by thermal x-rays...
X-ray diffraction from shock-loaded polycrystals (2007)
X-ray diffraction was demonstrated from shock-compressed polycrystalline metal on nanosecond time scales. Laser ablation was used to induce shock waves in polycrystalline foils of Be, 25 to 125...
Explanation for Anomalous Shock Temperatures Measured by Neutron Resonance Spectroscopy (2007)
Swift, Damian C., Seifter, Achim, Holtkamp, David B., Yuan, Vincent W., Bowman, David, Clark, David A.
Neutron resonance spectrometry (NRS) has been used to measure the temperature inside Mo samples during shock loading. The temperatures obtained were significantly higher than predicted assuming ideal...
The equation of state of solid nickel aluminide (2007)
Swift, Damian C., Paisley, Dennis L., McClellan, Kenneth J., Ackland, Graeme J.
The pressure-volume-temperature equation of state of the intermetallic compound NiAl was calculated theoretically, and compared with experimental measurements. Electron ground states were calculated...
Shock and Release Temperatures in Molybdenum (2007)
Swift, Damian C., Seifter, Achim, Holtkamp, David B., Clark, David A.
Shock and release temperatures in Mo were calculated, taking account of heating from plastic flow predicted using the Steinberg-Guinan model. Plastic flow was calculated self-consistently with the...
Numerical solution of shock and ramp compression for general material properties (2007)
A general formulation was developed to represent material models for applications in dynamic loading. Numerical methods were devised to calculate response to shock and ramp compression, and ramp...
On High Explosive Launching of Projectiles for Shock Physics Experiments (2007)
Swift, Damian C., Forest, Charles A., Clark, David A., Buttler, William T., Marr-Lyon, Mark, Rightley, Paul
The hydrodynamic operation of the `Forest Flyer' type of explosive launching system for shock physics projectiles was investigated in detail using one- and two-dimensional continuum dynamics...
Melting at the Limit of Superheating (2004)
Luo, Sheng-Nian, Ahrens, Thomas J., Swift, Damian C.
Theories on superheating-melting mostly involve vibrational and mechanical instabilities, catastrophes of entropy, volume and rigidity, and nucleation-based kinetic models. The maximum achievable...
Luo, Sheng-Nian, Swift, Damian C., Tierney, Thomas, Xia, Kaiwen, Tschauner, Oliver, Asimow, Paul D.
The maximum superheating of a solid prior to melting depends on the effective dimensionless nucleation energy barrier, heterogeneities such as free surfaces and defects, and heating rates....
Luo, Sheng-Nian, Ahrens, Thomas J., Çağin, Tahir, Strachan, Alejandro, Swift, Damian C.
The maximum superheating and undercooling achievable at various heating (or cooling) rates were investigated based on classical nucleation theory and undercooling experiments, molecular dynamics (MD)...