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Title: Fully three-dimensional simulation and modeling of a dense plasma focus

A dense plasma focus (DPF) is a pulsed-power machine that electromagnetically accelerates and cylindrically compresses a shocked plasma in a Z-pinch. The pinch results in a brief (~ 100 ns) pulse of X-rays, and, for some working gases, also a pulse of neutrons. A great deal of experimental research has been done into the physics of DPF reactions, and there exist mathematical models describing its behavior during the different time phases of the reaction. Two of the phases, known as the inverse pinch and the rundown, are approximately governed by magnetohydrodynamics, and there are a number of well-established codes for simulating these phases in two dimensions or in three dimensions under the assumption of axial symmetry. There has been little success, however, in developing fully three-dimensional simulations. In this work we present three-dimensional simulations of DPF reactions and demonstrate that three-dimensional simulations predict qualitatively and quantitatively different behavior than their two-dimensional counterparts. One of the most important quantities to predict is the time duration between the formation of the gas shock and Z-pinch, and the three-dimensional simulations more faithfully represent experimental results for this time duration and are essential for accurate prediction of future experiments.
Publication Date:
OSTI Identifier:
Report Number(s):
Journal ID: ISSN 1548-5129
DOE Contract Number:
Resource Type:
Journal Article
Resource Relation:
Journal Name: The Journal of Defense Modeling and Simulation: Applications, Methodology, Technology
Research Org:
Nevada Test Site/National Security Technologies, LLC (United States)
Sponsoring Org:
Country of Publication:
United States
Dense plasma focus, magnetohydrodynamics, simulation and modeling, controlled fusion