WADM and radiation MHD simulations of compact multi-planar and cylindrical wire arrays at 1 MA currents

Studies of Radiative and Implosion Characteristics From Brass Planar Wire Arrays

“…Simulation of the implosion dynamics with wire array loads was performed using WADM [7]. The WADM calculates the wire ablation and array implosion dynamics self-consistently in a single simulation using the approximation of discrete thin filaments that have mass and velocity and that conduct some electric current.…”

“…However, under the present set of assumptions, the WADM simulations of the cylindrical wire arrays are generally consistent with the predictions by the "rocket model". A detailed description of the WADM can be found in [7]. This model has been successfully used for the prediction of the implosion time of numerous PWA load configurations on Zebra.…”

Plasma ionization and resistivity models for low-, mid- and higher-atomic number plasmas and their applications to radiative properties of z-pinches

“…Hence, the classic electric resistance models, discussed in detail in this paper, cannot explain an excess amount of total radiated energy over the thermalized kinetic energy (see, for example, Ref. [15]), which typically is 4e8 kJ according to the WADM [2] calculations. This observation made specifically for Zebra z-pinch plasmas is, however, consistent with the analyses of the experimental data collected at other z-pinch facilities (see the discussion in Ref.…”

“…[1]). Various modeling tools such as radiation MHD code and Wire Ablation Dynamics Model (WADM) [2] and non-LTE atomic kinetic models [3e5] have been applied to analyze plasma dynamics and radiation features. Further progress in this direction can be achieved by application of existing numerical tools and deeper understanding of processes and effects directly affecting the plasma radiation features, such as Ohmic plasma heating.…”

“…The radiation MHD code, applied in [2] to simulate precursor column dynamics, in its current state uses a simplified SahaeBoltzmann model [6] that calculates plasma ionization balance in the LTE (Local Thermodynamic Equilibrium) approximation. Plasma electric resistance and other kinetic transport effects (electron and ion thermal conductivities etc.)…”