Wire ablation dynamics model and its application to imploding wire arrays of different geometries.

Area of Science:

• Plasma Physics
• High Energy Density Physics

Background:

• Wire array Z-pinches are used in fusion energy research and astrophysics.
• Understanding wire ablation is critical for optimizing implosion dynamics.

Purpose of the Study:

• To present an extended description of the amplified wire ablation dynamics model (WADM).
• To investigate the role of wire ablation effects on the implosion of wire array loads.

Main Methods:

• Simulations using the WADM for wire ablation and implosion.
• Analysis of experimental data from Cobra and Zebra generators.
• Investigating cylindrical and planar wire array loads with varying materials.

Main Results:

• Wire mass ablation rate depends on current and material properties.
• Aluminum wires ablate fastest; copper ablates slowest.
• Lower ablation rates lead to higher plasma velocity, increased energy coupling, and delayed implosion, especially in cylindrical arrays.

Conclusions:

• WADM is an efficient tool for wire array load design and optimization.
• Simulation data can simplify radiation magnetohydrodynamics modeling.
• Findings are relevant for inertial confinement fusion and laboratory astrophysics.