Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Engineering / Faculty of Engineering >
Peer-reviewed Journal Articles, etc >
Use of a twisted 3D Cauchy condition surface to reconstruct the last closed magnetic surface in a non-axisymmetric fusion plasma
Title: | Use of a twisted 3D Cauchy condition surface to reconstruct the last closed magnetic surface in a non-axisymmetric fusion plasma |
Authors: | Itagaki, Masafumi Browse this author →KAKEN DB | Okubo, Gaku Browse this author | Akazawa, Masayuki Browse this author | Matsumoto, Yutaka Browse this author | Watanabe, Kiyomasa Browse this author | Seki, Ryosuke Browse this author | Suzuki, Yasuhiro Browse this author |
Keywords: | magnetic sensor | plasma boundary | last closed magnetic surface | Cauchy condition surface method | twisted Cauchy condition surface | vacuum field | boundary integral equation |
Issue Date: | Dec-2012 |
Publisher: | IOP Publishing |
Journal Title: | Plasma Physics and Controlled Fusion |
Volume: | 54 |
Issue: | 12 |
Start Page: | 125003 |
Publisher DOI: | 10.1088/0741-3335/54/12/125003 |
Abstract: | 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. |
Rights: | 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 |
Type: | article (author version) |
URI: | http://hdl.handle.net/2115/58436 |
Appears in Collections: | 工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)
|
Submitter: 板垣 正文
|