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Title: Plasma-gun-assisted field-reversed configuration formation in a conical θ-pinch

We show through injection of plasma via an annular array of coaxial plasma guns, during the pre-ionization phase of field-reversed configuration (FRC) formation how to catalyze the bulk ionization of a neutral gas prefill in the presence of a strong axial magnetic field and change the character of outward flux flow during field-reversal from a convective process to a much slower resistive diffusion process. Our approach has been found to significantly improve FRC formation in a conical θ-pinch, resulting in a ~350% increase in trapped flux at typical operating conditions, an expansion of accessible formation parameter space to lower densities and higher temperatures, and a reduction or elimination of several deleterious effects associated with the pre-ionization phase.
Authors:
 [1] ;  [1] ;  [2]
  1. Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
  2. Univ. of Washington, Seattle, WA (United States)
Publication Date:
Report Number(s):
LA-UR-15-21805
Journal ID: ISSN 1070-664X; PHPAEN
Grant/Contract Number:
AC52-06NA25369
Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 22; Journal Issue: 4; Journal ID: ISSN 1070-664X
Publisher:
American Institute of Physics (AIP)
Research Org:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
Sponsoring Org:
USDOE Office of Science (SC), Fusion Energy Sciences (FES) (SC-24)
Country of Publication:
United States
Language:
English
Subject:
70 PLASMA PHYSICS AND FUSION TECHNOLOGY
OSTI Identifier:
1291216
Alternate Identifier(s):
OSTI ID: 1228234

Weber, T. E., Intrator, T. P., and Smith, R. J.. Plasma-gun-assisted field-reversed configuration formation in a conical θ-pinch. United States: N. p., Web. doi:10.1063/1.4919262.
Weber, T. E., Intrator, T. P., & Smith, R. J.. Plasma-gun-assisted field-reversed configuration formation in a conical θ-pinch. United States. doi:10.1063/1.4919262.
Weber, T. E., Intrator, T. P., and Smith, R. J.. 2015. "Plasma-gun-assisted field-reversed configuration formation in a conical θ-pinch". United States. doi:10.1063/1.4919262. https://www.osti.gov/servlets/purl/1291216.
@article{osti_1291216,
title = {Plasma-gun-assisted field-reversed configuration formation in a conical θ-pinch},
author = {Weber, T. E. and Intrator, T. P. and Smith, R. J.},
abstractNote = {We show through injection of plasma via an annular array of coaxial plasma guns, during the pre-ionization phase of field-reversed configuration (FRC) formation how to catalyze the bulk ionization of a neutral gas prefill in the presence of a strong axial magnetic field and change the character of outward flux flow during field-reversal from a convective process to a much slower resistive diffusion process. Our approach has been found to significantly improve FRC formation in a conical θ-pinch, resulting in a ~350% increase in trapped flux at typical operating conditions, an expansion of accessible formation parameter space to lower densities and higher temperatures, and a reduction or elimination of several deleterious effects associated with the pre-ionization phase.},
doi = {10.1063/1.4919262},
journal = {Physics of Plasmas},
number = 4,
volume = 22,
place = {United States},
year = {2015},
month = {4}
}