| タイトル |
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Improved Three-Dimensional CCS Method Analysis for the Reconstruction of the Peripheral Magnetic Field Structure in a Finite Beta Helical Plasma
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| 作成者 |
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| アクセス権 |
open access |
| 主題 |
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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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vacuum field
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Other
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singular value decomposition
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Other
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condition number
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NDC
427
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| 内容注記 |
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Abstract
en
In the previous 3D Cauchy-condition surface (CCS) method analysis to reconstruct the magnetic field profile in the Large Helical Device (LHD), one assumed an impractically large number of magnetic sensors, i.e., 440 field sensors and 126 flux loops. In the singular value decomposition (SVD) process employed in the CCS method, a gap is found in the magnitude of the singular values. The most accurate field results can be obtained if all the singular values smaller than the gap threshold are eliminated, independent of the number of boundary elements on the CCS and the number of sensors as well. With the reduction in the number of boundary elements, the required numbers of field sensors and flux loops are significantly reduced to 110 and 25, respectively, without losing the solution accuracy. They can be further reduced to 58 and 13 respectively if considering the symmetry of the field profile in the LHD. This result suggests the possibility of actual application to the LHD.
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| 出版者 |
en
The Japan Society of Plasma Science and Nuclear Fusion Research
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| 日付 |
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| 言語 |
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| 資源タイプ |
journal article |
| 出版タイプ |
VoR |
| 資源識別子 |
HDL
http://hdl.handle.net/2115/58438
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| 関連 |
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isIdenticalTo
DOI
https://doi.org/10.1585/pfr.8.1402134
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| 収録誌情報 |
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en
Plasma and Fusion Research
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巻8
開始ページ1402134
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| ファイル |
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| コンテンツ更新日時 |
2023-07-26 |
