Abstract
During tokamak vertical displacement events (VDEs), due to the rapid movement of plasma and rapidly decreasing current, induced currents appear in surrounding conductive components, including Resonant Magnetic Perturbation (RMP) coils. The electromagnetic load caused by the VDEs induced currents constitutes a threat for RMP coils as well as related components. Here the stress condition resulting from the aforementioned electromagnetic load in HL-2M, a large tokamak being assembled at Southwestern Institute of Physics of China, is analyzed using ANSYS. Engineered design of RMP coils in HL-2M is verified, and regions of stress concentration are noticed. To reduce analyzing complexity, a specific method aiming at calculating the transient electromagnetic load on local components around the plasma is proposed. Finite element analysis (FEA), application of Visual Basic Script (VBS) language in ANSYS Maxwell software, and data processing in MATLAB have been used in this analysis.
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