Free-boundary MRxMHD equilibrium calculations using the stepped-pressure equilibrium code

S. R. Hudson; J. Loizu; C. Zhu; Z. S. Qu; C. Nührenberg; S. Lazerson; C. B. Smiet; M. J. Hole

doi:10.1088/1361-6587/ab9a61

Free-boundary MRxMHD equilibrium calculations using the stepped-pressure equilibrium code

S. R. Hudson, J. Loizu, C. Zhu, Z. S. Qu, C. Nührenberg, S. Lazerson, C. B. Smiet, M. J. Hole

Research output: Contribution to journal › Article › peer-review

18 Citations (Scopus)

Abstract

The stepped-pressure equilibrium code (SPEC) (Hudson et al 2012 Phys. Plasmas 19, 112 502) is extended to enable free-boundary multi-region relaxed magnetohydrodynamic (MRxMHD) equilibrium calculations. The vacuum field surrounding the plasma inside an arbitrary 'computational boundary', D. is computed, and the virtual-casing principle is used iteratively to compute the normal field on D so that the equilibrium is consistent with an externally produced magnetic field. Recent modifications to SPEC are described, such as the use of Chebyshev polynomials to describe the radial dependence of the magnetic vector potential, and a variety of free-boundary verification calculations are presented.

Original language	English
Article number	084002
Journal	Plasma Physics and Controlled Fusion
Volume	62
Issue number	8
DOIs	https://doi.org/10.1088/1361-6587/ab9a61
Publication status	Published - Aug 2020

Access to Document

10.1088/1361-6587/ab9a61

Cite this

@article{0d7c94ab33634195b79fcb4249c26098,

title = "Free-boundary MRxMHD equilibrium calculations using the stepped-pressure equilibrium code",

abstract = "The stepped-pressure equilibrium code (SPEC) (Hudson et al 2012 Phys. Plasmas 19, 112 502) is extended to enable free-boundary multi-region relaxed magnetohydrodynamic (MRxMHD) equilibrium calculations. The vacuum field surrounding the plasma inside an arbitrary 'computational boundary', D. is computed, and the virtual-casing principle is used iteratively to compute the normal field on D so that the equilibrium is consistent with an externally produced magnetic field. Recent modifications to SPEC are described, such as the use of Chebyshev polynomials to describe the radial dependence of the magnetic vector potential, and a variety of free-boundary verification calculations are presented.",

keywords = "MHD, MRxMHD, SPEC, equlibria",

author = "Hudson, {S. R.} and J. Loizu and C. Zhu and Qu, {Z. S.} and C. N{\"u}hrenberg and S. Lazerson and Smiet, {C. B.} and Hole, {M. J.}",

note = "Publisher Copyright: {\textcopyright} 2020 IOP Publishing Ltd.",

year = "2020",

month = aug,

doi = "10.1088/1361-6587/ab9a61",

language = "English",

volume = "62",

journal = "Plasma Physics and Controlled Fusion",

issn = "0741-3335",

publisher = "IOP Publishing Ltd.",

number = "8",

}

TY - JOUR

T1 - Free-boundary MRxMHD equilibrium calculations using the stepped-pressure equilibrium code

AU - Hudson, S. R.

AU - Loizu, J.

AU - Zhu, C.

AU - Qu, Z. S.

AU - Nührenberg, C.

AU - Lazerson, S.

AU - Smiet, C. B.

AU - Hole, M. J.

PY - 2020/8

Y1 - 2020/8

N2 - The stepped-pressure equilibrium code (SPEC) (Hudson et al 2012 Phys. Plasmas 19, 112 502) is extended to enable free-boundary multi-region relaxed magnetohydrodynamic (MRxMHD) equilibrium calculations. The vacuum field surrounding the plasma inside an arbitrary 'computational boundary', D. is computed, and the virtual-casing principle is used iteratively to compute the normal field on D so that the equilibrium is consistent with an externally produced magnetic field. Recent modifications to SPEC are described, such as the use of Chebyshev polynomials to describe the radial dependence of the magnetic vector potential, and a variety of free-boundary verification calculations are presented.

AB - The stepped-pressure equilibrium code (SPEC) (Hudson et al 2012 Phys. Plasmas 19, 112 502) is extended to enable free-boundary multi-region relaxed magnetohydrodynamic (MRxMHD) equilibrium calculations. The vacuum field surrounding the plasma inside an arbitrary 'computational boundary', D. is computed, and the virtual-casing principle is used iteratively to compute the normal field on D so that the equilibrium is consistent with an externally produced magnetic field. Recent modifications to SPEC are described, such as the use of Chebyshev polynomials to describe the radial dependence of the magnetic vector potential, and a variety of free-boundary verification calculations are presented.

KW - MHD

KW - MRxMHD

KW - SPEC

KW - equlibria

UR - http://www.scopus.com/inward/record.url?scp=85088903692&partnerID=8YFLogxK

U2 - 10.1088/1361-6587/ab9a61

DO - 10.1088/1361-6587/ab9a61

M3 - Article

SN - 0741-3335

VL - 62

JO - Plasma Physics and Controlled Fusion

JF - Plasma Physics and Controlled Fusion

IS - 8

M1 - 084002

ER -

Free-boundary MRxMHD equilibrium calculations using the stepped-pressure equilibrium code

Abstract

Access to Document

Other files and links

Fingerprint

Cite this