Use of a twisted 3D Cauchy condition surface to reconstruct the last closed magnetic surface in a non-axisymmetric fusion plasma

Itagaki Masafumi; Okubo Gaku; Akazawa Masayuki; Matsumoto Yutaka; Watanabe Kiyomasa; Seki Ryosuke; Suzuki Yasuhiro

タイトル	en Use of a twisted 3D Cauchy condition surface to reconstruct the last closed magnetic surface in a non-axisymmetric fusion plasma
作成者	en Itagaki, Masafumi NRID 1000030281786 en Okubo, Gaku en Akazawa, Masayuki en Matsumoto, Yutaka en Watanabe, Kiyomasa en Seki, Ryosuke en Suzuki, Yasuhiro
アクセス権	open access
権利情報	en 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
主題	Other en magnetic sensor Other en plasma boundary Other en last closed magnetic surface Other en Cauchy condition surface method Other en twisted Cauchy condition surface Other en vacuum field Other en boundary integral equation NDC 427
内容注記	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.
出版者	en IOP Publishing
日付	Issued2012-12
言語	eng
資源タイプ	journal article
出版タイプ	AM
資源識別子	HDL http://hdl.handle.net/2115/58436
関連	isVersionOf DOI https://doi.org/10.1088/0741-3335/54/12/125003
収録誌情報	PISSN 0741-3335 EISSN 1361-6587 en Plasma Physics and Controlled Fusion 巻54 号12 開始ページ125003
ファイル	fulltext Plasma Phys. Control. Fusion, 54, 125003 (2012).pdf 3.29 MB (application/pdf) Issued2012-12
コンテンツ更新日時	2023-07-26