Structural Analysis of the NCSX Vacuum Vessel

Dahlgren, F.; Brooks, A.; Goranson, P.; Cole, M. J.; Titus, P.

doi:10.13182/fst05-a807

Cited by 2 publications

(2 citation statements)

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“…whether their moments were parallel or antiparallel to the hexahedral axes, were also free to vary. The hexahedra were constructed around an inner limiting surface with the dimensions of the NCSX vacuum vessel [27,29], which we note is not the same as the winding surface used to constrain the NCSX coils [30]. A minimum gap spacing of 2 cm was enforced between the magnets and the limiting surface.…”

Section: Scan Of Magnet Layer Thicknessmentioning

confidence: 99%

Geometric concepts for stellarator permanent magnet arrays

Hammond¹,

Zhu²,

Brown³

et al. 2020

Nucl. Fusion

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The development of stellarators that use permanent magnet arrays to shape their confining magnetic fields has been a topic of recent interest, but the requirements for how such magnets must be shaped, manufactured, and assembled remain to be determined. To address these open questions, we have performed a study of geometric concepts for magnet arrays with the aid of the newly developed Magpie code. A proposed experiment similar to the National Compact Stellarator Experiment (NCSX) is used as a test case. Two classes of magnet geometry are explored: curved bricks that conform to a regular grid in cylindrical coordinates, and hexahedra that conform to the toroidal plasma geometry. In addition, we test constraints on the magnet polarization. While magnet configurations constrained to be polarized normally to a toroidal surface around the plasma are unable to meet the required magnetic field parameters when subject to physical limitations on the strength of present-day magnets, configurations with unconstrained polarizations are shown to satisfy the physics requirements for a targeted plasma.

show abstract

Section: Scan Of Magnet Layer Thicknessmentioning

confidence: 99%

Geometric concepts for stellarator permanent magnet arrays

Hammond¹,

Zhu²,

Brown³

et al. 2020

Nucl. Fusion

View full text Add to dashboard Cite

show abstract

“…whether their moments were parallel or antiparallel to the hexahedral axes, was also free to vary. The hexahedra were constructed around an inner limiting surface with the dimensions of the NCSX vacuum vessel [13,16], which we note is not the same as the winding surface used to constrain the NCSX coils [17]. A minimum gap spacing of 2 cm was enforced between the magnets and the limiting surface.…”

Section: Scan Of Magnet Layer Thicknessmentioning

confidence: 99%

Geometric concepts for stellarator permanent magnet arrays

Hammond,

Zhu,

Brown

et al. 2020

Preprint

View full text Add to dashboard Cite

The development of stellarators that use permanent magnet arrays to shape their confining magnetic fields has been a topic of recent interest, but the requirements for how such magnets must be shaped, manufactured, and assembled remain to be determined. To address these open questions, we have performed a study of geometric concepts for magnet arrays with the aid of the newly developed MAGPIE code. A proposed experiment similar to the National Compact Stellarator Experiment (NCSX) is used as a test case. Two classes of magnet geometry are explored: curved bricks that conform to a regular grid in cylindrical coordinates, and hexahedra that conform to the toroidal plasma geometry. In addition, we test constraints on the magnet polarization. While magnet configurations constrained to be polarized normally to a toroidal surface around the plasma are unable to meet the required magnetic field parameters when subject to physical limitations on the strength of present-day magnets, configurations with unconstrained polarizations are shown to satisfy the physics requirements for a targeted plasma.

show abstract

Structural Analysis of the NCSX Vacuum Vessel

Abstract: Abstract

Cited by 2 publications

References 0 publications

Geometric concepts for stellarator permanent magnet arrays

Geometric concepts for stellarator permanent magnet arrays

Geometric concepts for stellarator permanent magnet arrays

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