High precision Hugoniot measurements on statically pre-compressed fluid helium
نویسندگان
چکیده
منابع مشابه
High pressure Hugoniot measurements using converging shocks
Plate impact experiments are a powerful tool in equation of state development, but are inherently limited by the range of impact velocities accessible to the facility. In an effort to dramatically increase the range of pressures which can be studied with available impact velocities, a new experimental technique is examined. The target plate is replaced by a composite assembly consisting of two ...
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Traditionally, most dynamic shock compression experiments are conducted using a plane one-dimensional wave of uniaxial strain. In this case, the evaluation of the equation of state is simplified due to the geometry, but the amplitude of the induced shock wave is limited by the magnitude of the input load. In an effort to dramatically increase the range of pressures that can be accessed by tradi...
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The properties of hot dense helium at megabar pressures are studied with two first principles computer simulation techniques: path integral Monte Carlo simulation and density functional molecular dynamics. The simulations predict that the compressibility of helium is substantially increased by electronic excitations that are present in the hot fluid at thermodynamic equilibrium. A maximum compr...
متن کاملQuantum molecular dynamics simulations for compressed fluid helium
Helium is very suitable to investigate the highpressure behavior since no dissociation equilibrium between molecules and atoms interferes with the ionization equilibrium, and the first (24.6 eV) and second ionization energy (54.4 eV) are well separated. Surprisingly, only few experimental and theoretical studies exist for warm dense helium [1, 2, 3, 4]. We have performed quantum molecular dynam...
متن کاملHigh Pressure Hugoniot Measurements in Solids Using Mach Reflections
Shock compression experiments provide access to extreme pressures in a laboratory setting. Matter at these pressures is often studied by utilizing a well controlled planar impact between two flat plates to generate a one dimensional shock wave. While these experiments are a powerful tool in equation of state (EOS) development, they are inherently limited by the velocity of the impacting plate. ...
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ژورنال
عنوان ژورنال: Journal of Applied Physics
سال: 2016
ISSN: 0021-8979,1089-7550
DOI: 10.1063/1.4963284