Eddy current loss of CFETR TF case during plasma disruption

• Published in: Fusion engineering and design Vol. 161; p. 111915
• Main Authors: Liu, Xufeng, Zheng, Jinxing, Du, Shuangsong, Feng, Changle, Ni, Xiaojun
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01.12.2020; Elsevier Science Ltd
• Subjects: Coil case; Coils; Cryogenic equipment; Current loss; Disruption; Eddy current loss; Eddy current testing; Eddy currents; Magnetic shielding; Plasma; Plasma disruption; Quasi-analytical method; Shielding effect; Vessels; Plasma disruption; Shielding effect; Eddy current loss; Quasi-analytical method; Coil case
• ISSN: 0920-3796; 1873-7196
• DOI: 10.1016/j.fusengdes.2020.111915

•Assess Joule loss by eddy current induced in TF coil case during plasma disruption.•A quasi-analysis method is applied to calculate the eddy current loss according to decompose the magnetic field on TF coil case as parallel and normal component.•The method can used to assess the safety of TF magnet quickly. Eddy currents induced on the Toroidal Field (TF) coil case during a plasma disruption will cause Joule losses. The analysis of eddy current loss is very important for the safety of the TF coils and cryogenic system. Eddy currents on the TF coil case are related to the decay mode of the plasma and the shielding effect of the vacuum vessel. The magnetic fields on the TF coil case are shown to have both a parallel and normal component. Eddy current losses can be calculated by a quasi-analytical method. Results show that the eddy current loss of the TF coil case during a plasma disruption is very large in spite of the shielding of the vacuum vessel.