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Title: Interactions of magnetized plasma flows in pulsed-power driven experiments

Abstract

A supersonic flow of magnetized plasma is produced by the application of a 1 MA-peak, 500 ns current pulse to a cylindrical arrangement of parallel wires, known as an inverse wire array. The plasma flow is produced by the J x B acceleration of the ablated wire material, and a magnetic field of several Tesla is embedded at source by the driving current. This setup has been used for a variety of experiments investigating the interactions of magnetized plasma flows. In experiments designed to investigate magnetic reconnection, the collision of counter-streaming flows, carrying oppositely directed magnetic fields, leads to the formation of a reconnection layer in which we observe ions reaching temperatures much greater than predicted by classical heating mechanisms. The breakup of this layer under the plasmoid instability is dependent on the properties of the inflowing plasma, which can be controlled by the choice of the wire array material. In other experiments, magnetized shocks were formed by placing obstacles in the path of the magnetized plasma flow. The pile-up of magnetic flux in front of a conducting obstacle produces a magnetic precursor acting on upstream electrons at the distance of the ion inertial length. This precursor subsequently develops intomore » a steep density transition via ion-electron fluid decoupling. Obstacles which possess a strong private magnetic field affect the upstream flow over a much greater distance, providing an extended bow shock structure. In the region surrounding the obstacle the magnetic pressure holds off the flow, forming a void of plasma material, analogous to the magnetopause around planetary bodies with self-generated magnetic fields.« less

Authors:
; ; ; ; ; ; ; ; ; ; ; ; ;
Publication Date:
DOE Contract Number:  
SC0016215
Research Org.:
Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States). Plasma Science and Fusion Center
Sponsoring Org.:
USDOE Office of Science (SC), Fusion Energy Sciences (FES)
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1881450
DOI:
https://doi.org/10.7910/DVN/HJSYM1

Citation Formats

Suttle, L. G., Burdiak, G. C., Cheung, C. L., Clayson, T., Halliday, J. W. D., Hare, J. D., Rusli, S., Russell, D., Tubman, E., Ciardi, A., Loureiro, N. F., Li, J., Frank, A., and Lebedev, S. V. Interactions of magnetized plasma flows in pulsed-power driven experiments. United States: N. p., 2019. Web. doi:10.7910/DVN/HJSYM1.
Suttle, L. G., Burdiak, G. C., Cheung, C. L., Clayson, T., Halliday, J. W. D., Hare, J. D., Rusli, S., Russell, D., Tubman, E., Ciardi, A., Loureiro, N. F., Li, J., Frank, A., & Lebedev, S. V. Interactions of magnetized plasma flows in pulsed-power driven experiments. United States. doi:https://doi.org/10.7910/DVN/HJSYM1
Suttle, L. G., Burdiak, G. C., Cheung, C. L., Clayson, T., Halliday, J. W. D., Hare, J. D., Rusli, S., Russell, D., Tubman, E., Ciardi, A., Loureiro, N. F., Li, J., Frank, A., and Lebedev, S. V. 2019. "Interactions of magnetized plasma flows in pulsed-power driven experiments". United States. doi:https://doi.org/10.7910/DVN/HJSYM1. https://www.osti.gov/servlets/purl/1881450. Pub date:Thu Nov 21 00:00:00 EST 2019
@article{osti_1881450,
title = {Interactions of magnetized plasma flows in pulsed-power driven experiments},
author = {Suttle, L. G. and Burdiak, G. C. and Cheung, C. L. and Clayson, T. and Halliday, J. W. D. and Hare, J. D. and Rusli, S. and Russell, D. and Tubman, E. and Ciardi, A. and Loureiro, N. F. and Li, J. and Frank, A. and Lebedev, S. V.},
abstractNote = {A supersonic flow of magnetized plasma is produced by the application of a 1 MA-peak, 500 ns current pulse to a cylindrical arrangement of parallel wires, known as an inverse wire array. The plasma flow is produced by the J x B acceleration of the ablated wire material, and a magnetic field of several Tesla is embedded at source by the driving current. This setup has been used for a variety of experiments investigating the interactions of magnetized plasma flows. In experiments designed to investigate magnetic reconnection, the collision of counter-streaming flows, carrying oppositely directed magnetic fields, leads to the formation of a reconnection layer in which we observe ions reaching temperatures much greater than predicted by classical heating mechanisms. The breakup of this layer under the plasmoid instability is dependent on the properties of the inflowing plasma, which can be controlled by the choice of the wire array material. In other experiments, magnetized shocks were formed by placing obstacles in the path of the magnetized plasma flow. The pile-up of magnetic flux in front of a conducting obstacle produces a magnetic precursor acting on upstream electrons at the distance of the ion inertial length. This precursor subsequently develops into a steep density transition via ion-electron fluid decoupling. Obstacles which possess a strong private magnetic field affect the upstream flow over a much greater distance, providing an extended bow shock structure. In the region surrounding the obstacle the magnetic pressure holds off the flow, forming a void of plasma material, analogous to the magnetopause around planetary bodies with self-generated magnetic fields.},
doi = {10.7910/DVN/HJSYM1},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2019},
month = {11}
}

Works referencing / citing this record:

Interactions of magnetized plasma flows in pulsed-power driven experiments
journal, December 2019