Magnetic Islands Observed by a Fast-Framing Tangentially Viewing Soft X-Ray Camera on LHD and TEXTOR

作     者：S. OHDACHI K. TOI G. FUCHS TEXTOR Team 

作者机构：National Institute for Fusion Science Toki 509-5292 Gifu Japan Institut fiir Plasma physik Forschungszentrum Jfilich GmbH Euratom Association D-52425 Jülich Germany 

出 版 物：《Plasma Science and Technology》 (等离子体科学和技术（英文版）)

年 卷 期：2006年第8卷第1期

页      面：45-49页

核心收录：

学科分类：07[理学] 070204[理学-等离子体物理] 0702[理学-物理学] 

基　　金：NIFs budget NIFS05ULHH08, 09 Sports and Culture, Grant -in-Aid for Scientific Research (B) 中日核心大学计划等离子体和核聚变项目(TaskI-1B) Ministry of Education, Science 

主　　题：magnetic island, fluctuation measurement tomography 

摘      要：The formation of magnetic islands within plasmas confined magnetically within the tori has significant influence upon their confinement and stability. To obtain an experimental insight into the formation and dynamics of such island structures we employed a fast framing camera viewing the plasma tangentially in the toroidal direction. The toroidal viewing direction gives the advantage in that the islands are viewed almost tangentially and this greatly facilitates the reconstruction of the local data from the line integrated ones. We discuss an effective method to do inversion. To study the fluctuations seen in the video images we perform a singular value decomposition, and then we use a truncated least square method to infer their pictures in space.