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Title: Quasi-static and dynamic magnetic tension forces in arched, line-tied magnetic flux ropes
Contributors: Myers, Clayton
Yamada, Masaaki
Ji, Hantao
Yoo, Jongsoo
Jara-Almonte, Jonathan
Fox, William
U. S. Department of Energy contract number DE-AC02-09CH11466
National Science Foundation/Department of Energy Center for Magnetic Self-Organization
Keywords: Laboratory Astrophysics
Solar Eruptions
Magnetohydrodynamic Equilibrium
Magnetohydrodynamic Instabilities
Issue Date: Dec-2016
Publisher: Princeton Plasma Physics Laboratory, Princeton University
Abstract: Solar eruptions are often driven by magnetohydrodynamic instabilities such as the torus and kink instabilities that act on line-tied magnetic flux ropes. Recent laboratory experiments designed to study these eruptive instabilities have demonstrated the key role of both dynamic (Myers et al 2015 Nature 528, 526) and quasi-static (Myers et al 2016 Phys. Plasmas, in press) magnetic tension forces in contributing to the equilibrium and stability of line-tied magnetic flux ropes. In this paper, we synthesize these laboratory results and explore the relationship between the dynamic and quasi-static tension forces. While the quasi-static tension force is found to contribute to the flux rope equilibrium in a number of regimes, the dynamic tension force is substantial mostly in the so-called failed torus regime where magnetic self-organization events prevent the flux rope from erupting.
Appears in Collections:Plasma Science & Technology

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