Impact of n = 1 field on the non-axisymmetric magnetic perturbations associated with the edge localized mode crashes in the ASDEX Upgrade tokamak

Nuclear Fushion

article

Li Li¹  Marc Maraschek³  Matthias Bernert³  Peter Denner¹  Michael Faitsch³  Sina Fietz³  Yu Gao¹  Louis Giannone³  Andrew Kirk⁴  Hendrik Meyer⁴  Felician Mink³  Paolo Piovesan⁵  The ASDEX Upgrade Team³  Nengchao Wang⁶  Yunfeng Liang⁶  Valentin Igochine³  Wolfgang Suttrop³ 

[1] Forschungszentrum Jülich GmbH, Institut für Energie- und Klimaforschung—Plasmaphysik;College of Science, Donghua University;Max-Planck-Institut für Plasmaphysik;CCFE, Culham Science Centre;Consorzio RFX;International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics, State Key Laboratory of Advanced Electromagnetic Engineering and Technology, School of Electrical and Electronic Engineering, Huazhong University of Science and Technology;Institute of Plasma Physics, Chinese Academy of Sciences

关键词: edge localized modes;    non-axisymmetric magnetic perturbation;    phase locking;    magnetic reconnection;    ASDEX Upgrade;    tokamak;   

DOI  :  10.1088/1741-4326/ab0f82

来源: Institute of Physics Publishing Ltd.

【 摘 要 】

In the ASDEX Upgrade tokamak, the growth of non-axisymmetric magnetic perturbation (NAMP) associated with the ELM crash events has been observed, and both the poloidal and toroidal phases of NAMPs, measured by a set of Mirnov coils, were highly random. By applying ann   =  1 magnetic perturbation (MP) field, the phases of NAMPs were locked to the phase of the totaln   =  1 resonant MP (RMP) field, which takes the plasma response to the MP field into account. This observation can be explained by the resonant electromagnetic J   ×   B torque applied by the RMP field on a magnetic island formed due to the magnetic reconnection, which is predicted to occur during the ELM crashes by several numerical modelling results.

【 授权许可】

Unknown