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DOE OSTI · 2008175

Seeding the Electrothermal Instability through a Three-Dimensional, Nonlinear Perturbation

Yu, Edmund P.·Awe, Thomas James·Cochrane, Kyle R.·Peterson, Kyle John·Yates, Kevin Colligan·Hutchinson, Trevor M.·Hatch, Maren Whiting·Bauer, Bruno S.·Tomlinson, Kurt·Sinars, Daniel B.
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Abstract

Electrothermal instability plays an important role in applications of current-driven metal, creating striations (which seed the magneto–Rayleigh-Taylor instability) and filaments (which provide a more rapid path to plasma formation). However, the initial formation of both structures is not well understood. Here, simulations show for the first time how a commonly occurring isolated defect transforms into the larger striation and filament, through a feedback loop connecting current and electrical conductivity. Simulations have been experimentally validated using defect-driven self-emission patterns.

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42 ENGINEERING70 PLASMA PHYSICS AND FUSION TECHNOLOGYhigh-energy-density plasmasmagnetohydrodynamicsmagnetoinertial fusionplasma instabilities

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Yu, Edmund P., Awe, Thomas James, Cochrane, Kyle R., Peterson, Kyle John, Yates, Kevin Colligan, Hutchinson, Trevor M., Hatch, Maren Whiting, Bauer, Bruno S., Tomlinson, Kurt, Sinars, Daniel B.. 2023-06-22. Seeding the Electrothermal Instability through a Three-Dimensional, Nonlinear Perturbation. https://doi.org/10.1103/physrevlett.130.255101

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