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

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 et al.

Plasma Physics and Controlled Fusion, 2012, 54(12), 125003

Permalink : https://hdl.handle.net/2115/58436

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アクセス権	open access
URI	https://hdl.handle.net/2115/58436
タイトル	Use of a twisted 3D Cauchy condition surface to reconstruct the last closed magnetic surface in a non-axisymmetric fusion plasma
著者	Itagaki, Masafumi ; Okubo, Gaku ; Akazawa, Masayuki ; Matsumoto, Yutaka ; Watanabe, Kiyomasa ; Seki, Ryosuke ; Suzuki, Yasuhiro
e-Rad_Researcher 30281786 著者名 Itagaki, Masafumi
著者名 Okubo, Gaku
著者名 Akazawa, Masayuki
著者名 Matsumoto, Yutaka
著者名 Watanabe, Kiyomasa
著者名 Seki, Ryosuke
著者名 Suzuki, Yasuhiro
言語	英語
キーワード	magnetic sensor
	plasma boundary
	last closed magnetic surface
	Cauchy condition surface method
	twisted Cauchy condition surface
	vacuum field
	boundary integral equation
発行日	2012-12
出版者	IOP Publishing
収録物名	Plasma Physics and Controlled Fusion
巻(号)	54(12)
ページ	125003
抄録	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.
資源タイプ	学術雑誌論文
出版タイプ	Accepted Manuscript
権利情報	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
PISSN	0741-3335
EISSN	1361-6587
関連情報 (isVersionOf)	出版社版DOI https://doi.org/10.1088/0741-3335/54/12/125003