Experimental study and two-dimensional modelling of the plasma dynamics of magnetically driven shock waves in a coaxial tube

Abstract

Plasma shocks can be magnetically driven during high current discharges in low-pressure gases, induced by an external electric circuit. Radial currents between two coaxial electrodes can be accelerated to velocities of the order of 10 cm µs −1 , thus being an effective method to transform potential energy in

Numerical Simulation of the Inductance Variation of a Plasma Focus Based in a Two-Dimensional Model

“…A 2-D discrete numerical model for the CS evolution in PF devices has been previously developed [7], based on the tracking of the CS at any fixed instant of time, by means of a set of conical elements. Each element moves along the direction defined by its normal according to dp…”

“…For this reason, theoretical models of the CS cinematic that compare well with measurements of the timevarying component of the inductance have a better experimental support. In this paper, the 2-D numerical model CSHOCK [7], [9] is applied to indirectly determine the variable shaping of the CS in a PF device, using a set of electric diagnostics from which the variation of the gun inductance can be estimated.…”

Toroidal High-Density Singularity in a Small Plasma Focus

“…The evolution of the CS in PF-50J was modeled by means of CShock [4,5], which is a validated numerical code of PF discharges based in a two-dimensional model. The code showed great capabilities to predict the dynamics of the CS and was validated against a number of experiments in small PF devices.…”

Magnetohydrodynamic simulation for plasma focus devices

“…Moreno et al [15] investigated another plasma focus model derived from a thermonuclear model. It was applied successfully to explain the variation in the neutron yield with a change in the gas pressure in chambers filled with deuterium, the current evolution, and the geometrical parameters of electrodes.…”

“…It was applied successfully to explain the variation in the neutron yield with a change in the gas pressure in chambers filled with deuterium, the current evolution, and the geometrical parameters of electrodes. Moreno et al [15] assumed that the current sheath in the form of conical segments was moving at a certain angle and that each plasma segment accelerated by the Lorentz force moved normal to its surface.…”