skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

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

Journal Article · · Physics of Plasmas
DOI:https://doi.org/10.1063/1.4963249· OSTI ID:1417971
 [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
+ Show Author Affiliations

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.

Research Organization:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Organization:
USDOE National Nuclear Security Administration (NNSA)
Grant/Contract Number:
NA0001836
OSTI ID:
1417971
Journal Information:
Physics of Plasmas, Vol. 23, Issue 9; ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)Copyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 3 works
Citation information provided by
Web of Science

References (10)

Two dimensional triangulation of breakdown in a high voltage coaxial gap journal July 2015
A 1MA, variable risetime pulse generator for high energy density plasma research journal July 2008
Implosion of solid liner for compression of field reversed configuration journal January 2001
Instability growth in magnetically imploded high-conductivity cylindrical liners with material strength journal October 2002
Pulsed-power-driven cylindrical liner implosions of laser preheated fuel magnetized with an axial field journal May 2010
Threshold for Thermal Ionization of an Aluminum Surface by Pulsed Megagauss Magnetic Field journal January 2010
Investigation of the effect of a power feed vacuum gap in solid liner experiments at 1 MA journal September 2015
Beryllium liner implosion experiments on the Z accelerator in preparation for magnetized liner inertial fusion journal May 2013
The Role of Flux Advection in the Development of the Ablation Streams and Precursors of Wire Array Z-pinches
  • Greenly, John; Martin, Matthew; Blesener, Isaac
  • DENSE Z-PINCHES: Proceedings of the 7th International Conference on Dense Z-Pinches, AIP Conference Proceedings https://doi.org/10.1063/1.3079752
conference January 2009
9 Inertial confinement fusion: z-pinch book January 2003

Similar Records

Related Subjects

70 PLASMA PHYSICS AND FUSION TECHNOLOGY