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Title: Emergent kink stability of a magnetized plasma jet injected into a transverse background magnetic field

Abstract

In this paper, we report experimental results on the injection of a magnetized plasma jet into a transverse background magnetic field in the HelCat linear plasma device at the University of New Mexico [M. Gilmore et al., J. Plasma Phys. 81(1), 345810104 (2015)]. After the plasma jet leaves the plasma-gun muzzle, a tension force arising from an increasing curvature of the background magnetic field induces in the jet a sheared axial-flow gradient above the theoretical kink-stabilization threshold. Finally, we observe that this emergent sheared axial flow stabilizes the n = 1 kink mode in the jet, whereas a kink instability is observed in the jet when there is no background magnetic field present.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [2];  [1];  [1]
  1. Univ. of New Mexico, Albuquerque, NM (United States)
  2. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Publication Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org.:
USDOE Office of Science (SC). Fusion Energy Sciences (FES) (SC-24)
OSTI Identifier:
1469557
Report Number(s):
LA-UR-18-25842
Journal ID: ISSN 1070-664X
Grant/Contract Number:  
AC52-06NA25396
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; Journal Issue: 11; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY

Citation Formats

Zhang, Yue, Gilmore, Mark, Hsu, Scott C., Fisher, Dustin M., and Lynn, Alan G. Emergent kink stability of a magnetized plasma jet injected into a transverse background magnetic field. United States: N. p., 2017. Web. doi:10.1063/1.5010188.
Zhang, Yue, Gilmore, Mark, Hsu, Scott C., Fisher, Dustin M., & Lynn, Alan G. Emergent kink stability of a magnetized plasma jet injected into a transverse background magnetic field. United States. doi:10.1063/1.5010188.
Zhang, Yue, Gilmore, Mark, Hsu, Scott C., Fisher, Dustin M., and Lynn, Alan G. Tue . "Emergent kink stability of a magnetized plasma jet injected into a transverse background magnetic field". United States. doi:10.1063/1.5010188. https://www.osti.gov/servlets/purl/1469557.
@article{osti_1469557,
title = {Emergent kink stability of a magnetized plasma jet injected into a transverse background magnetic field},
author = {Zhang, Yue and Gilmore, Mark and Hsu, Scott C. and Fisher, Dustin M. and Lynn, Alan G.},
abstractNote = {In this paper, we report experimental results on the injection of a magnetized plasma jet into a transverse background magnetic field in the HelCat linear plasma device at the University of New Mexico [M. Gilmore et al., J. Plasma Phys. 81(1), 345810104 (2015)]. After the plasma jet leaves the plasma-gun muzzle, a tension force arising from an increasing curvature of the background magnetic field induces in the jet a sheared axial-flow gradient above the theoretical kink-stabilization threshold. Finally, we observe that this emergent sheared axial flow stabilizes the n = 1 kink mode in the jet, whereas a kink instability is observed in the jet when there is no background magnetic field present.},
doi = {10.1063/1.5010188},
journal = {Physics of Plasmas},
number = 11,
volume = 24,
place = {United States},
year = {2017},
month = {11}
}

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