Comparisons Between Experimental Measurments and Numerical Simulations of Spheromak Formation in SSPX

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Data from a recently installed insertable magnetic probe array in the Sustained Spheromak Physics Experiment (SSPX) [E. B. Hooper et al., Nucl. Fusion 39, 863 (1999)] is compared against NIMROD [C. R. Sovinec et al., J. Comp. Phys. 195, 355 (2004)], a full 3D resistive magnetohydrodynamic code that is used to simulate SSPX plasmas. The experiment probe consists of a linear array of chip inductors arranged in clusters that are spaced every 2 cm, and spans the entire machine radius at the flux conserver midplane. Both the experiment and the numerical simulations show the appearance, shortly after breakdown, of a ... continued below

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Romero-Talam?s, C A; Hooper, E B; Hill, D N; Cohen, B I; McLean, H S; Wood, R D et al. March 15, 2006.

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Data from a recently installed insertable magnetic probe array in the Sustained Spheromak Physics Experiment (SSPX) [E. B. Hooper et al., Nucl. Fusion 39, 863 (1999)] is compared against NIMROD [C. R. Sovinec et al., J. Comp. Phys. 195, 355 (2004)], a full 3D resistive magnetohydrodynamic code that is used to simulate SSPX plasmas. The experiment probe consists of a linear array of chip inductors arranged in clusters that are spaced every 2 cm, and spans the entire machine radius at the flux conserver midplane. Both the experiment and the numerical simulations show the appearance, shortly after breakdown, of a column with a hollow current profile that precedes magnetic reconnection, a process essential to the formation of closed magnetic flux surfaces. However, there are differences between the experiment and the simulation in how the column evolves after it is formed. These differences are studied to help identify the mechanisms that eventually lead to closed-flux surfaces (azimuthally averaged) and flux amplification, which occur in both the experiment and the simulation.

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PDF-file: 10 pages; size: 4.3 Mbytes

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  • Journal Name: Journal of Fusion Energy, vol. 26, no. 1/2, June 1, 2007, pp. 169-172; Journal Volume: 26; Journal Issue: 1/2

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  • Report No.: UCRL-JRNL-219888
  • Grant Number: W-7405-ENG-48
  • Office of Scientific & Technical Information Report Number: 936484
  • Archival Resource Key: ark:/67531/metadc898830

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  • March 15, 2006

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  • Sept. 27, 2016, 1:39 a.m.

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  • Nov. 22, 2016, 11:08 p.m.

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Romero-Talam?s, C A; Hooper, E B; Hill, D N; Cohen, B I; McLean, H S; Wood, R D et al. Comparisons Between Experimental Measurments and Numerical Simulations of Spheromak Formation in SSPX, article, March 15, 2006; Livermore, California. (digital.library.unt.edu/ark:/67531/metadc898830/: accessed September 25, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.