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Title: Study of the time-resolved, 3-dimensional current density distribution in solid metallic liners at 1 MA

Abstract

We present a study of the time varying current density distribution in solid metallic liner experiments at the 1MA level. Measurements are taken using an array of magnetic field probes which provide 2D triangulation of the average centroid of the drive current in the load at 3 discrete axial positions. These data are correlated with gated optical self-emission imaging which directly images the breakdown and plasma formation region. Results show that the current density is azimuthally non-uniform, and changes significantly throughout the 100ns experimental timescale. Magnetic field probes show clearly motion of the current density around the liner azimuth over 10ns timescales. If breakdown is initiated at one azimuthal location, the current density remains non-uniform even over large spatial extents throughout the current drive. The evolution timescales are suggestive of a resistive diffusion process or uneven current distributions among simultaneously formed but discrete plasma conduction paths.

Authors:
 [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [2];  [2];  [2];  [2]; ORCiD logo [2]
  1. Univ. of California, San Diego, CA (United States)
  2. Cornell Univ., Ithaca, NY (United States). Lab. for Plasma Studies
Publication Date:
Research Org.:
DOE
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1417971
Grant/Contract Number:
NA0001836
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 23; Journal Issue: 9; 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

Bott-Suzuki, S. C., Cordaro, S. W., Caballero Bendixsen, L. S., Atoyan, L., Byvank, T., Potter, W., Kusse, B. R., Greenly, J. B., and Hammer, D. A.. Study of the time-resolved, 3-dimensional current density distribution in solid metallic liners at 1 MA. United States: N. p., 2016. Web. doi:10.1063/1.4963249.
Bott-Suzuki, S. C., Cordaro, S. W., Caballero Bendixsen, L. S., Atoyan, L., Byvank, T., Potter, W., Kusse, B. R., Greenly, J. B., & Hammer, D. A.. Study of the time-resolved, 3-dimensional current density distribution in solid metallic liners at 1 MA. United States. doi:10.1063/1.4963249.
Bott-Suzuki, S. C., Cordaro, S. W., Caballero Bendixsen, L. S., Atoyan, L., Byvank, T., Potter, W., Kusse, B. R., Greenly, J. B., and Hammer, D. A.. Thu . "Study of the time-resolved, 3-dimensional current density distribution in solid metallic liners at 1 MA". United States. doi:10.1063/1.4963249. https://www.osti.gov/servlets/purl/1417971.
@article{osti_1417971,
title = {Study of the time-resolved, 3-dimensional current density distribution in solid metallic liners at 1 MA},
author = {Bott-Suzuki, S. C. and Cordaro, S. W. and Caballero Bendixsen, L. S. and Atoyan, L. and Byvank, T. and Potter, W. and Kusse, B. R. and Greenly, J. B. and Hammer, D. A.},
abstractNote = {We present a study of the time varying current density distribution in solid metallic liner experiments at the 1MA level. Measurements are taken using an array of magnetic field probes which provide 2D triangulation of the average centroid of the drive current in the load at 3 discrete axial positions. These data are correlated with gated optical self-emission imaging which directly images the breakdown and plasma formation region. Results show that the current density is azimuthally non-uniform, and changes significantly throughout the 100ns experimental timescale. Magnetic field probes show clearly motion of the current density around the liner azimuth over 10ns timescales. If breakdown is initiated at one azimuthal location, the current density remains non-uniform even over large spatial extents throughout the current drive. The evolution timescales are suggestive of a resistive diffusion process or uneven current distributions among simultaneously formed but discrete plasma conduction paths.},
doi = {10.1063/1.4963249},
journal = {Physics of Plasmas},
number = 9,
volume = 23,
place = {United States},
year = {Thu Sep 01 00:00:00 EDT 2016},
month = {Thu Sep 01 00:00:00 EDT 2016}
}

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