Extension of the SIESTA MHD equilibrium code to freeplasmaboundary problems
Abstract
Here, SIESTA is a recently developed MHD equilibrium code designed to perform fast and accurate calculations of ideal MHD equilibria for threedimensional 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 fixedboundary 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 freeplasmaboundary 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 W7X stellarator.
 Authors:

 Univ. Carlos III de Madrid, Madrid (Spain)
 MaxPlanckInstitut fur Plasmaphysik, Greifswald (Germany)
 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:
 AC0500OR22725
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physics of Plasmas
 Additional Journal Information:
 Journal Volume: 24; Journal Issue: 8; Journal ID: ISSN 1070664X
 Publisher:
 American Institute of Physics (AIP)
 Country of Publication:
 United States
 Language:
 English
 Subject:
 70 PLASMA PHYSICS AND FUSION TECHNOLOGY
Citation Formats
PerazaRodriguez, Hugo, ReynoldsBarredo, J. M., Sanchez, Raul, Geiger, J., Tribaldos, V., Hirshman, Steven Paul, and Cianciosa, Mark R. Extension of the SIESTA MHD equilibrium code to freeplasmaboundary problems. United States: N. p., 2017.
Web. doi:10.1063/1.4986447.
PerazaRodriguez, Hugo, ReynoldsBarredo, J. M., Sanchez, Raul, Geiger, J., Tribaldos, V., Hirshman, Steven Paul, & Cianciosa, Mark R. Extension of the SIESTA MHD equilibrium code to freeplasmaboundary problems. United States. doi:10.1063/1.4986447.
PerazaRodriguez, Hugo, ReynoldsBarredo, J. M., Sanchez, Raul, Geiger, J., Tribaldos, V., Hirshman, Steven Paul, and Cianciosa, Mark R. Mon .
"Extension of the SIESTA MHD equilibrium code to freeplasmaboundary 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 freeplasmaboundary problems},
author = {PerazaRodriguez, Hugo and ReynoldsBarredo, 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 threedimensional 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 fixedboundary 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 freeplasmaboundary 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 W7X stellarator.},
doi = {10.1063/1.4986447},
journal = {Physics of Plasmas},
number = 8,
volume = 24,
place = {United States},
year = {2017},
month = {8}
}
Web of Science
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