BADGER v1.0: A Fortran equation of state library

Heltemes, Thad; Moses, G.A.

doi:10.1016/j.cpc.2012.07.010

Cited by 28 publications

(14 citation statements)

References 19 publications

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“…the ns laser pulse with energy of 180J, flat-top temporal profile of duration 1.9 ns plus 0.1ns rising and falling times, and spot diameter of about 160 µm is incident on the foil targets at an oblique angle of about 45 • . The equation of state (EOS) and opacity of solid foil materials (CH and Cu) come from the code BADGER 38 and IONMIX 39 , respectively. The initial densities of the foils are set to ρ CH = 1.02 g/cm 3 and ρ Cu = 8.92 g/cm 3 .…”

Section: Radiation-magnetohydrodynamic (Rmhd) Simulationmentioning

confidence: 99%

Three-dimensional synchronous proton radiography for dynamic magnetic fields in laser-produced high-energy-density plasmas

Zhao¹,

et al. 2021

Preprint

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Understanding the generation and evolution of magnetic fields in high-energy-density plasmas is a major scientific challenge in broad research areas including astrophysics, cosmology, and laser fusion energy. However, the fully three-dimensional (3D) topologies of such dynamic magnetic fields are still unknown yet. Here we report experiments of the first 3D synchronous proton radiography for self-generated magnetic fields in respectively laser-produced low-Z CH and high-Z Cu plasmas. The radiography images show that abundant 3D filamentary structures of magnetic fields grow up in coronal region of CH plasmas, while for Cu, the fields are majorly compressed along the dense surface region whose internal structures are pretty vague. These results are reproduced and explained by a combination of radiation-magnetohydrodynamic, particle-in-cell and Vlasov-Fokker-Planck simulations, where the cross-scale effects of Biermann battery, Nernst advection, resistive diffusion, Righi-Leduc and particularly kinetic Weibel instability are all taken into account. Our findings provide much enlightenment to the role of magnetic field generation in implosion and hohlraum dynamics of laser fusion.

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Section: Radiation-magnetohydrodynamic (Rmhd) Simulationmentioning

confidence: 99%

Three-dimensional synchronous proton radiography for dynamic magnetic fields in laser-produced high-energy-density plasmas

Zhao¹,

et al. 2021

Preprint

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“…S2. The differences in the equation of state (EOS) 35 and opacity 36 of the Cu and CH lead to the asymmetric plasma states on both sides. For both plasmas, the thermal pressure to magnetic pressure ratio β > 1 and the ram pressure to magnetic pressure ratio β ram 1 indicate that reconnection is strongly driven 19,20 .…”

Section: Hybrid Collisional-collisionless Magnetic Reconnection: Simu...mentioning

confidence: 99%

“…The ns laser pulses with energy of 800J (a multiplier is used to account for the scattering caused by parameter instabilities and match the plasma morphology in the experiments), flat-top temporal profile of duration 0.9 ns plus 0.1ns rising and falling times, and focal spots consistent with experiments are incident on the foil targets at an oblique angle of about 45 • . The equation of state (EOS) and opacity of solid foil materials (CH and Cu) come from the code BADGER 35 and IONMIX 36 , respectively. The initial densities of the solid foil targets are set to ρ CH = 1.02 g/cm 3 and ρ Cu = 8.92 g/cm 3 , and the rest is filled with background He gas with a density of 2 × 10 −6 g/cm 3 .…”

Section: D Radiation-magnetohydrodynamic (Rmhd) Simulationmentioning

confidence: 99%

Laboratory observation of plasmoid-dominated magnetic reconnection in hybrid collisional-collisionless regime

Zhao¹,

An²,

Xie³

et al. 2022

Preprint

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Magnetic reconnection, breaking and reorganization of magnetic field topology, is a fundamental process for rapid release of magnetic energy into plasma particles that occurs pervasively throughout the universe. In most natural circumstances, the plasma properties on either side of the reconnection layer are asymmetric, in particular for the collision rates that are associated with a combination of density and temperature and critically determine the reconnection mechanism. To date, all laboratory experiments on magnetic reconnections have been limited to purely collisional or collisionless regimes. Here, we report a well-designed experimental investigation on asymmetric magnetic reconnections in a novel hybrid collisional-collisionless regime by interactions between laser-ablated Cu and CH plasmas. We show that the growth rate of the tearing instability in such a hybrid regime is still extremely large, resulting in rapid formation of multiple plasmoids, lower than that in the purely collisionless regime but much higher than the collisional case. In addition, we, for the first time, directly observe the topology evolutions of the whole process of plasmoid-dominated magnetic reconnections by using highly-resolved proton radiography.

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“…Note that E 0 (V ) is continuous at V m by definition. This procedure gives a smooth transition from SCE model to the QSM, and it is expected to be better than modifying the definition of E c (V ) arbitrarily [19].…”

Section: Correction For Strong Compressionmentioning

confidence: 99%

Scaling of Phase Diagram and Critical Point Parameters in Liquid-Vapour Phase Transition of Metallic Fluids

Menon¹

2021

Condensed Matter

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The first objective of this paper is to investigate the scaling behavior of liquid-vapor phase transition in FCC and BCCmetals starting from the zero-temperature four-parameter formula for cohesive energy. The effective potentials between the atoms in the solid are determined while using lattice inversion techniques as a function of scaling variables in the four-parameter formula. These potentials are split into repulsive and attractive parts, as per the Weeks–Chandler–Anderson prescription, and used in the coupling-parameter expansion for solving the Ornstein–Zernike equation that was supplemented with an accurate closure. Thermodynamic quantities obtained via the correlation functions are used in order to obtain critical point parameters and liquid-vapor phase diagrams. Their dependence on the scaling variables in the cohesive energy formula are also determined. An equally important second objective of the paper is to revisit coupling parameter expansion for solving the Ornstein–Zernike equation. The Newton–Armijo non-linear solver and Krylov-space based linear solvers are employed in this regard. These methods generate a robust algorithm that can be used to span the entire fluid region, except very low temperatures. The accuracy of the method is established by comparing the phase diagrams with those that were obtained via computer simulation. The avoidance of the ’no-solution-region’ of the Ornstein-Zernike equation in coupling-parameter expansion is also discussed. Details of the method and complete algorithm provided here would make this technique more accessible to researchers investigating the thermodynamic properties of one component fluids.

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BADGER v1.0: A Fortran equation of state library

Cited by 28 publications

References 19 publications

Three-dimensional synchronous proton radiography for dynamic magnetic fields in laser-produced high-energy-density plasmas

Three-dimensional synchronous proton radiography for dynamic magnetic fields in laser-produced high-energy-density plasmas

Laboratory observation of plasmoid-dominated magnetic reconnection in hybrid collisional-collisionless regime

Scaling of Phase Diagram and Critical Point Parameters in Liquid-Vapour Phase Transition of Metallic Fluids

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