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Title: The Role of Ion Acoustic Instability in the Development of the Azimuthal Current Density Profile in Liner Experiments at 1 MA

Abstract

Recent work reported on the current density in pulsed-power-driven liners where a vacuum gap was introduced in the power feed connecting the liner to the generator. The resultant gap flashover generates azimuthally localized current-carrying plasma channels, which can create an azimuthal nonuniformity in the current density. The current density evolves during the current pulse, but nonuniformity is observed through the experiment timescale. Magnetohydrodynamic simulation work in 3-D demonstrates the difficulty in reproducing the experimental data within a limited computational domain, and those boundary conditions may dominate this paper. Furthermore, the development of current-driven instabilities in the plasma channels can explain the liner current density evolution, and specifically the ion acoustic instability can account for the main features observed in the experiments.

Authors:
ORCiD logo [1];  [1];  [2]; ORCiD logo [2];  [2];  [2];  [2];  [2];  [3]
  1. Univ. of California, San Diego, La Jolla, CA (United States)
  2. Cornell Univ., Ithaca, NY (United States)
  3. Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)
Publication Date:
Research Org.:
Cornell Univ., Ithaca, NY (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1499659
Grant/Contract Number:  
NA0003764
Resource Type:
Accepted Manuscript
Journal Name:
IEEE Transactions on Plasma Science
Additional Journal Information:
Journal Volume: 46; Journal Issue: 6; Journal ID: ISSN 0093-3813
Publisher:
IEEE
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 42 ENGINEERING; current density; plasma pinch; plasma stability; vacuum breakdown

Citation Formats

Bott-Suzuki, Simon C., Cordaro, Samuel W., Atoyan, L., Byvank, T., Potter, W., Kusse, B. R., Greenly, J. B., Hammer, D. A., and Jennings, C. A. The Role of Ion Acoustic Instability in the Development of the Azimuthal Current Density Profile in Liner Experiments at 1 MA. United States: N. p., 2017. Web. doi:10.1109/TPS.2017.2783192.
Bott-Suzuki, Simon C., Cordaro, Samuel W., Atoyan, L., Byvank, T., Potter, W., Kusse, B. R., Greenly, J. B., Hammer, D. A., & Jennings, C. A. The Role of Ion Acoustic Instability in the Development of the Azimuthal Current Density Profile in Liner Experiments at 1 MA. United States. doi:10.1109/TPS.2017.2783192.
Bott-Suzuki, Simon C., Cordaro, Samuel W., Atoyan, L., Byvank, T., Potter, W., Kusse, B. R., Greenly, J. B., Hammer, D. A., and Jennings, C. A. Wed . "The Role of Ion Acoustic Instability in the Development of the Azimuthal Current Density Profile in Liner Experiments at 1 MA". United States. doi:10.1109/TPS.2017.2783192. https://www.osti.gov/servlets/purl/1499659.
@article{osti_1499659,
title = {The Role of Ion Acoustic Instability in the Development of the Azimuthal Current Density Profile in Liner Experiments at 1 MA},
author = {Bott-Suzuki, Simon C. and Cordaro, Samuel W. and Atoyan, L. and Byvank, T. and Potter, W. and Kusse, B. R. and Greenly, J. B. and Hammer, D. A. and Jennings, C. A.},
abstractNote = {Recent work reported on the current density in pulsed-power-driven liners where a vacuum gap was introduced in the power feed connecting the liner to the generator. The resultant gap flashover generates azimuthally localized current-carrying plasma channels, which can create an azimuthal nonuniformity in the current density. The current density evolves during the current pulse, but nonuniformity is observed through the experiment timescale. Magnetohydrodynamic simulation work in 3-D demonstrates the difficulty in reproducing the experimental data within a limited computational domain, and those boundary conditions may dominate this paper. Furthermore, the development of current-driven instabilities in the plasma channels can explain the liner current density evolution, and specifically the ion acoustic instability can account for the main features observed in the experiments.},
doi = {10.1109/TPS.2017.2783192},
journal = {IEEE Transactions on Plasma Science},
number = 6,
volume = 46,
place = {United States},
year = {2017},
month = {12}
}

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