Title |
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Use of a twisted 3D Cauchy condition surface to reconstruct the last closed magnetic surface in a non-axisymmetric fusion plasma
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Creator |
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Accessrights |
open access |
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Copyright © 2012 IOP Publishing Ltd.This is an author-created, un-copyedited version of an article accepted for publication in Plasma Physics and Controlled Fusion. IOP Publishing Ltd is not responsible for any errors or omissions in this version of the manuscript or any version derived from it. The definitive publisher-authenticated version is available online at 10.1088/0741-3335/54/12/125003
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Subject |
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Other
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magnetic sensor
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Other
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plasma boundary
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Other
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last closed magnetic surface
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Other
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Cauchy condition surface method
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Other
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twisted Cauchy condition surface
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Other
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vacuum field
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Other
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boundary integral equation
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NDC
427
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Description |
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Abstract
en
The three-dimensional (3D) Cauchy condition surface (CCS) method code, 'CCS3D', is now under development to reconstruct the 3D magnetic field profile outside a non-axisymmetric fusion plasma using only magnetic sensor signals. A new 'twisted CCS' is introduced, whose elliptic cross-section rotates with the variation in plasma geometry in the toroidal direction of a helical-type device. Independent of the toroidal angle, this CCS can be placed at a certain distance from the last closed magnetic surface (LCMS). With this new CCS, it is found through test calculations for the Large Helical Device that the numerical accuracy in the reconstructed field is improved. Furthermore, the magnetic field line tracing indicates the LCMS more precisely than with the use of the axisymmetric CCS. A new idea to determine the LCMS numerically is also proposed.
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Publisher |
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IOP Publishing
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Date |
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Language |
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Resource Type |
journal article |
Version Type |
AM |
Identifier |
HDL
http://hdl.handle.net/2115/58436
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Relation |
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isVersionOf
DOI
https://doi.org/10.1088/0741-3335/54/12/125003
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Journal |
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PISSN
0741-3335
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EISSN
1361-6587
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en
Plasma Physics and Controlled Fusion
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Volume Number54
Issue Number12
Page Start125003
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File |
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Oaidate |
2023-07-26 |