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Title: Extension of the SIESTA MHD equilibrium code to free-plasma-boundary problems

Abstract

Here, SIESTA is a recently developed MHD equilibrium code designed to perform fast and accurate calculations of ideal MHD equilibria for three-dimensional magnetic configurations. Since SIESTA does not assume closed magnetic surfaces, the solution can exhibit magnetic islands and stochastic regions. In its original implementation SIESTA addressed only fixed-boundary problems. That is, the shape of the plasma edge, assumed to be a magnetic surface, was kept fixed as the solution iteratively converges to equilibrium. This condition somewhat restricts the possible applications of SIESTA. In this paper we discuss an extension that will enable SIESTA to address free-plasma-boundary problems, opening up the possibility of investigating problems in which the plasma boundary is perturbed either externally or internally. As an illustration, SIESTA is applied to a configuration of the W7-X stellarator.

Authors:
ORCiD logo [1];  [1]; ORCiD logo [1];  [2];  [1]; ORCiD logo [3]; ORCiD logo [3]
  1. Univ. Carlos III de Madrid, Madrid (Spain)
  2. Max-Planck-Institut fur Plasmaphysik, Greifswald (Germany)
  3. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Publication Date:
Research Org.:
Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
Sponsoring Org.:
USDOE Office of Science (SC)
OSTI Identifier:
1394623
Alternate Identifier(s):
OSTI ID: 1377087
Grant/Contract Number:  
AC05-00OR22725
Resource Type:
Accepted Manuscript
Journal Name:
Physics of Plasmas
Additional Journal Information:
Journal Volume: 24; 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

Citation Formats

Peraza-Rodriguez, Hugo, Reynolds-Barredo, J. M., Sanchez, Raul, Geiger, J., Tribaldos, V., Hirshman, Steven Paul, and Cianciosa, Mark R. Extension of the SIESTA MHD equilibrium code to free-plasma-boundary problems. United States: N. p., 2017. Web. doi:10.1063/1.4986447.
Peraza-Rodriguez, Hugo, Reynolds-Barredo, J. M., Sanchez, Raul, Geiger, J., Tribaldos, V., Hirshman, Steven Paul, & Cianciosa, Mark R. Extension of the SIESTA MHD equilibrium code to free-plasma-boundary problems. United States. doi:10.1063/1.4986447.
Peraza-Rodriguez, Hugo, Reynolds-Barredo, J. M., Sanchez, Raul, Geiger, J., Tribaldos, V., Hirshman, Steven Paul, and Cianciosa, Mark R. Mon . "Extension of the SIESTA MHD equilibrium code to free-plasma-boundary problems". United States. doi:10.1063/1.4986447. https://www.osti.gov/servlets/purl/1394623.
@article{osti_1394623,
title = {Extension of the SIESTA MHD equilibrium code to free-plasma-boundary problems},
author = {Peraza-Rodriguez, Hugo and Reynolds-Barredo, J. M. and Sanchez, Raul and Geiger, J. and Tribaldos, V. and Hirshman, Steven Paul and Cianciosa, Mark R.},
abstractNote = {Here, SIESTA is a recently developed MHD equilibrium code designed to perform fast and accurate calculations of ideal MHD equilibria for three-dimensional magnetic configurations. Since SIESTA does not assume closed magnetic surfaces, the solution can exhibit magnetic islands and stochastic regions. In its original implementation SIESTA addressed only fixed-boundary problems. That is, the shape of the plasma edge, assumed to be a magnetic surface, was kept fixed as the solution iteratively converges to equilibrium. This condition somewhat restricts the possible applications of SIESTA. In this paper we discuss an extension that will enable SIESTA to address free-plasma-boundary problems, opening up the possibility of investigating problems in which the plasma boundary is perturbed either externally or internally. As an illustration, SIESTA is applied to a configuration of the W7-X stellarator.},
doi = {10.1063/1.4986447},
journal = {Physics of Plasmas},
number = 8,
volume = 24,
place = {United States},
year = {2017},
month = {8}
}

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