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Title: Full- f gyrokinetic simulation of turbulence in a helical open-field-line plasma

Abstract

Curvature-driven turbulence in a helical open-field-line plasma is investigated using electrostatic five-dimensional gyrokinetic continuum simulations in an all-bad-curvature helical-slab geometry. Parameters for a National Spherical Torus Experiment scrape-off-layer plasma are used in the model. Here, the formation and convective radial transport of plasma blobs is observed, and it is shown that the radial particle-transport levels are several times higher than diffusive Bohm-transport estimates. By reducing the strength of the poloidal magnetic field, the profile of the heat flux to the divertor plate is observed to broaden.

Authors:
ORCiD logo [1]; ORCiD logo [2]; ORCiD logo [2];  [2]
  1. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States); Princeton Univ., Princeton, NJ (United States). Dept. of Astrophysical Sciences
  2. Princeton Plasma Physics Lab. (PPPL), Princeton, NJ (United States)
Publication Date:
Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
Sponsoring Org.:
USDOE National Nuclear Security Administration (NNSA)
OSTI Identifier:
1497984
Report Number(s):
LLNL-JRNL-759681
Journal ID: ISSN 1070-664X; 947057
Grant/Contract Number:  
AC52-07NA27344
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 26; Journal Issue: 1; 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

Citation Formats

Shi, E. L., Hammett, G. W., Stoltzfus-Dueck, T., and Hakim, A. Full-f gyrokinetic simulation of turbulence in a helical open-field-line plasma. United States: N. p., 2019. Web. doi:10.1063/1.5074179.
Shi, E. L., Hammett, G. W., Stoltzfus-Dueck, T., & Hakim, A. Full-f gyrokinetic simulation of turbulence in a helical open-field-line plasma. United States. doi:10.1063/1.5074179.
Shi, E. L., Hammett, G. W., Stoltzfus-Dueck, T., and Hakim, A. Mon . "Full-f gyrokinetic simulation of turbulence in a helical open-field-line plasma". United States. doi:10.1063/1.5074179. https://www.osti.gov/servlets/purl/1497984.
@article{osti_1497984,
title = {Full-f gyrokinetic simulation of turbulence in a helical open-field-line plasma},
author = {Shi, E. L. and Hammett, G. W. and Stoltzfus-Dueck, T. and Hakim, A.},
abstractNote = {Curvature-driven turbulence in a helical open-field-line plasma is investigated using electrostatic five-dimensional gyrokinetic continuum simulations in an all-bad-curvature helical-slab geometry. Parameters for a National Spherical Torus Experiment scrape-off-layer plasma are used in the model. Here, the formation and convective radial transport of plasma blobs is observed, and it is shown that the radial particle-transport levels are several times higher than diffusive Bohm-transport estimates. By reducing the strength of the poloidal magnetic field, the profile of the heat flux to the divertor plate is observed to broaden.},
doi = {10.1063/1.5074179},
journal = {Physics of Plasmas},
number = 1,
volume = 26,
place = {United States},
year = {2019},
month = {1}
}

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