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Title: Liner implosion experiments driven by a dynamic screw pinch

Abstract

This paper expands upon recent experimental results [Campbell et al., Phys. Rev. Lett. 125, 035001 (2020)], where thin-foil liner implosions were driven by a dynamic screw pinch (DSP) and found to have magneto-Rayleigh–Taylor instability (MRTI) amplitudes up to three times smaller than in implosions driven by a standard z-pinch (SZP). Here, the expanded discussion presented herein includes: (1) a detailed comparison of the MRTI growth measured in the experiment with that calculated from theory; (2) measurements of axial magnetic field injection into the liner interior prior to the implosion, as well as the subsequent compression of this field during the implosion; (3) an in-depth description of how the helical geometry of the DSP can result in earlier implosion and stagnation times relative to the SZP; and (4) particle-in-cell simulations showing different electron drift behavior in the anode–cathode gap of the DSP relative to the SZP, and how this difference may be related to the different current waveforms recorded during the experiments.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1]; ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [3];  [4];  [4]; ORCiD logo [4];  [4]; ORCiD logo [4]; ORCiD logo [1]
  1. Univ. of Michigan, Ann Arbor, MI (United States)
  2. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
  3. Naval Research Lab., Washington, DC (United States)
  4. Cornell Univ., Ithaca, NY (United States)
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1814613
Grant/Contract Number:  
NA0003764; NA0003525
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 28; Journal Issue: 8; 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; Plasma confinement; Rogowski coils; Flow instabilities; Particle-in-cell method; Magnetic energy; Magnetohydrodynamics; Plasma diagnostics

Citation Formats

Campbell, Paul C., Jones, T. M., Woolstrum, J. M., Jordan, N. M., Schmit, P. F., Velikovich, A. L., Greenly, J. B., Potter, W. M., Lavine, E. S., Kusse, B. R., Hammer, D. A., and McBride, R. D. Liner implosion experiments driven by a dynamic screw pinch. United States: N. p., 2021. Web. doi:10.1063/5.0044906.
Campbell, Paul C., Jones, T. M., Woolstrum, J. M., Jordan, N. M., Schmit, P. F., Velikovich, A. L., Greenly, J. B., Potter, W. M., Lavine, E. S., Kusse, B. R., Hammer, D. A., & McBride, R. D. Liner implosion experiments driven by a dynamic screw pinch. United States. https://doi.org/10.1063/5.0044906
Campbell, Paul C., Jones, T. M., Woolstrum, J. M., Jordan, N. M., Schmit, P. F., Velikovich, A. L., Greenly, J. B., Potter, W. M., Lavine, E. S., Kusse, B. R., Hammer, D. A., and McBride, R. D. Thu . "Liner implosion experiments driven by a dynamic screw pinch". United States. https://doi.org/10.1063/5.0044906. https://www.osti.gov/servlets/purl/1814613.
@article{osti_1814613,
title = {Liner implosion experiments driven by a dynamic screw pinch},
author = {Campbell, Paul C. and Jones, T. M. and Woolstrum, J. M. and Jordan, N. M. and Schmit, P. F. and Velikovich, A. L. and Greenly, J. B. and Potter, W. M. and Lavine, E. S. and Kusse, B. R. and Hammer, D. A. and McBride, R. D.},
abstractNote = {This paper expands upon recent experimental results [Campbell et al., Phys. Rev. Lett. 125, 035001 (2020)], where thin-foil liner implosions were driven by a dynamic screw pinch (DSP) and found to have magneto-Rayleigh–Taylor instability (MRTI) amplitudes up to three times smaller than in implosions driven by a standard z-pinch (SZP). Here, the expanded discussion presented herein includes: (1) a detailed comparison of the MRTI growth measured in the experiment with that calculated from theory; (2) measurements of axial magnetic field injection into the liner interior prior to the implosion, as well as the subsequent compression of this field during the implosion; (3) an in-depth description of how the helical geometry of the DSP can result in earlier implosion and stagnation times relative to the SZP; and (4) particle-in-cell simulations showing different electron drift behavior in the anode–cathode gap of the DSP relative to the SZP, and how this difference may be related to the different current waveforms recorded during the experiments.},
doi = {10.1063/5.0044906},
journal = {Physics of Plasmas},
number = 8,
volume = 28,
place = {United States},
year = {Thu Aug 19 00:00:00 EDT 2021},
month = {Thu Aug 19 00:00:00 EDT 2021}
}

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