Abstract
The study of plasma instabilities is a research topic with fundamental importance since for the majority of plasma applications they are unwanted and there is always the need for their suppression. The initiating physical processes that seed the generation of plasma instabilities are not well understood in all plasma geometries and initial states of matter. For most plasma instability studies, using linear or even nonlinear magnetohydrodynamics (MHD) theory, the most crucial step is to correctly choose the initial perturbations imposed either by a predefined perturbation, usually sinusoidal, or by randomly seed perturbations as initial conditions. Here, we demonstrate that the efficient study of the seeding mechanisms of plasma instabilities requires the incorporation of the intrinsic real physical characteristics of the solid target in an electro-thermo-mechanical multiphysics study. The present proof-of-principle study offers a perspective to the understanding of the seeding physical mechanisms in the generation of plasma instabilities.
Highlights
The study of plasma instabilities is a research topic with fundamental importance since for the majority of plasma applications they are unwanted and there is always the need for their suppression
In the light of the above, here we offer a perspective to these efforts, since we do not start from a MHD plasma state at solid density but from a real solid, incorporating the initial material physical properties of the target in an ETM multiphysics study of simulations and experiments
Thick exploding wires are chosen as loaded targets since the low, slowly rising heating current conveniently allows the study of plasma generation at the skin effect mode, where all phases of matter can exist simultaneously for relatively long times
Summary
The study of plasma instabilities is a research topic with fundamental importance since for the majority of plasma applications they are unwanted and there is always the need for their suppression. In the light of the above, here we offer a perspective to these efforts, since we do not start from a MHD plasma state at solid density but from a real solid, incorporating the initial material physical properties of the target in an ETM multiphysics study of simulations and experiments. This is a major step that alleviates some of the aforementioned difficulties and provides perspectives in the study of seeding mechanisms for the generation of plasma instabilities. This unambiguously demonstrates the critical role of the use of the real intrinsic physical properties of the target when the seeding mechanisms of plasma instabilities are studied
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