Determination of a macro- to micro-scale progression leading to a magnetized plasma disruption
Abstract
We report here the observations of a plasma jet evolving through a macro- to micro-scale progression sequence. This leads to a fast magnetic reconnection that results in the jet breaking off from its originating electrode and forming a force-free state. A sausage-like pinching occurs first and squeezes an initially fat, short magnetized jet so that it becomes thin. The thin jet then becomes kink unstable. The lengthening of the jet by the kinking thins the jet even more since the kink is an incompressible instability. When the jet radius becomes comparable to the ion-skin depth, Hall and electron inertial physics become important and establish the environment for a fast magnetic reconnection. This fast reconnection occurs, disrupting the jet and establishing a force-free state. X-ray bursts and whistler waves, evidence of a magnetic reconnection, are observed when the plasma jet breaks off from the electrode. This experimentally confirmed sequence of successive thinning from pinching followed by kinking is reproduced in a three-dimensional ideal Magnetohydrodynamic (MHD) numerical simulation. The results of the experiment and the numerical simulation, together demonstrate a viable path from macro-scale MHD physics to micro-scale non-MHD physics where fast reconnection occurs.
- Authors:
-
- California Institute of Technology (CalTech), Pasadena, CA (United States); Univ. of California, Los Angeles, CA (United States)
- California Institute of Technology (CalTech), Pasadena, CA (United States)
- California Institute of Technology (CalTech), Pasadena, CA (United States); NASA Ames Research Center (ARC), Moffett Field, Mountain View, CA (United States)
- Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
- Publication Date:
- Research Org.:
- California Institute of Technology (CalTech), Pasadena, CA (United States); Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Fusion Energy Sciences (FES); USDOE Advanced Research Projects Agency - Energy (ARPA-E); National Science Foundation (NSF); US Air Force Office of Scientific Research (AFOSR)
- OSTI Identifier:
- 1631737
- Alternate Identifier(s):
- OSTI ID: 1599249; OSTI ID: 1764227
- Report Number(s):
- LA-UR-20-28589
Journal ID: ISSN 1070-664X; TRN: US2201028
- Grant/Contract Number:
- FG02-04ER54755; AR0000565; FA9550-11-1-0184; 89233218CNA000001
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physics of Plasmas
- Additional Journal Information:
- Journal Volume: 27; Journal Issue: 2; 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; Fusion energy; Magnetic reconnection; Computer simulation; Stability theory; Stark effect; Doppler effect; Whistler waves; Plasmas; X-ray bursts
Citation Formats
Seo, Byonghoon, Wongwaitayakornkul, Pakorn, Haw, Magnus A., Marshall, Ryan S., Li, Hui, and Bellan, Paul M. Determination of a macro- to micro-scale progression leading to a magnetized plasma disruption. United States: N. p., 2020.
Web. doi:10.1063/1.5140348.
Seo, Byonghoon, Wongwaitayakornkul, Pakorn, Haw, Magnus A., Marshall, Ryan S., Li, Hui, & Bellan, Paul M. Determination of a macro- to micro-scale progression leading to a magnetized plasma disruption. United States. https://doi.org/10.1063/1.5140348
Seo, Byonghoon, Wongwaitayakornkul, Pakorn, Haw, Magnus A., Marshall, Ryan S., Li, Hui, and Bellan, Paul M. Wed .
"Determination of a macro- to micro-scale progression leading to a magnetized plasma disruption". United States. https://doi.org/10.1063/1.5140348. https://www.osti.gov/servlets/purl/1631737.
@article{osti_1631737,
title = {Determination of a macro- to micro-scale progression leading to a magnetized plasma disruption},
author = {Seo, Byonghoon and Wongwaitayakornkul, Pakorn and Haw, Magnus A. and Marshall, Ryan S. and Li, Hui and Bellan, Paul M.},
abstractNote = {We report here the observations of a plasma jet evolving through a macro- to micro-scale progression sequence. This leads to a fast magnetic reconnection that results in the jet breaking off from its originating electrode and forming a force-free state. A sausage-like pinching occurs first and squeezes an initially fat, short magnetized jet so that it becomes thin. The thin jet then becomes kink unstable. The lengthening of the jet by the kinking thins the jet even more since the kink is an incompressible instability. When the jet radius becomes comparable to the ion-skin depth, Hall and electron inertial physics become important and establish the environment for a fast magnetic reconnection. This fast reconnection occurs, disrupting the jet and establishing a force-free state. X-ray bursts and whistler waves, evidence of a magnetic reconnection, are observed when the plasma jet breaks off from the electrode. This experimentally confirmed sequence of successive thinning from pinching followed by kinking is reproduced in a three-dimensional ideal Magnetohydrodynamic (MHD) numerical simulation. The results of the experiment and the numerical simulation, together demonstrate a viable path from macro-scale MHD physics to micro-scale non-MHD physics where fast reconnection occurs.},
doi = {10.1063/1.5140348},
journal = {Physics of Plasmas},
number = 2,
volume = 27,
place = {United States},
year = {Wed Feb 12 00:00:00 EST 2020},
month = {Wed Feb 12 00:00:00 EST 2020}
}
Web of Science
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