Electromagnetic Force Analysis Of The Vacuum Chamber Of China Fusion Engineering Test Reactor Under The Worst Condition

China Fusion Engineering Test Reactor is a magnetically constrained tokamak device independently designed and constructed by China.The tokamak device conducts fusion reactions by confining the plasma with a magnetic field.In the vacuum chamber of the D-shaped tokamak device,the plasma current will disturb as the reaction progresses,disrupting the balance inside the vacuum chamber and triggering extreme operating conditions.Apply electromagnetic load to the vacuum chamber and its window support.The vertical displacement event is a typical extreme working condition.The electromagnetic force in the vertical displacement event is generated by the induced eddy current and halo current.Compared with other working conditions,the magnitude and direction of the plasma current of the vertical displacement event will change with time.The current generated by the magnetic flux changes during the event causes electromagnetic force under the action of the magnetic field.The electromagnetic load has a significant impact on the stability of the vacuum chamber and window components,and it is necessary to calculate the electromagnetic force before the design and processing of the device.The principle of electromagnetic analysis in this thesis is based on that the current quenching in the vertical displacement event will cause induced eddy currents,which will cause electromagnetic loads on the vacuum chamber and windows in the magnetic field environment.By simulating the current change in the vertical displacement event of China Fusion Engineering Test Reactor device during operation,the electromagnetic force is calculated and analyzed to evaluate the electromagnetic load on the vacuum chamber and the window.In this thesis,ANSYS Maxwell finite element software is used to calculate and analyze the electromagnetic force generated by the induced current in the upward vertical displacement event by transient solution.Compared with the static solution of the electromagnetic force,the transient solution of the electromagnetic force greatly reduces the calculation.Process,saving time and cost,and the calculation results are more integrated.Plasma changes in vertical displacement events are more complicated,and the transient solution needs to obtain a dynamic plasma current model.Therefore,in this thesis,data processing is performed before the calculation of the electromagnetic force of the induced current,and the dynamic plasma is extracted by interpolation.Body current data for use by ANSYS Maxwell software.The main work of this thesis is also composed of two parts: data interpolation processing and finite element electromagnetic analysis.For the electromagnetic force generated by the halo current in the vertical displacement event,this thesis loads the limit value of the electromagnetic force through mathematical calculation.This thesis carefully considers the change of the plasma current distribution with time,accurately simulates the current excitation load,and gives a limit value for the electromagnetic force of the vacuum chamber and window of the China Fusion Engineering Test Reactor.The design plan provides reference data and design basis.