Studies On Suitable For High Performance Plasma Of Divertor Engineering Of EAST

The dissertation is about studies on suitable for high performance plasma of divertor engineering of EAST.The use of EAST's ITER-like tungsten divertor has created a world record of 101.2s long pulse plasma operation.It has provided abundant design parameters for the design of ITER and CFETR.The advanced divertor is designed to achieve the stable operation of long pulse with higher parameters.It is also a target demand for "13th Five-Year".The geometric configuration of advanced tungsten divertor suitable for long pulse and high ? H-mode plasma.Under the future advanced tungsten divertor,the target is to achieve long pulse plasma.The divertor is designed to fit the heat flux up to 1 OMW/m2.The high thermal load area adopts tungsten monoblock structure.The research on upgrading of tungsten divertor in EAST has been carried out since 2015.The geometric configuration of the divertor is designed based on simulating the parameters of electron temperature,heat flux and electron density on the divertor target under different configurations.At the same time,the geometric configuration of the plasma divertor suitable for multi-configuration is established by making full use of the divertor area of the narrow vacuum chamber.The heat transfer characteristics of monoblock and the influence of tungsten block shape on heat transfer performance are analyzed.A variety of divertor cooling schemes are designed.The heat transfer analysis and simulation of the divertor cooling structures are carried out by using the finite element method.The design of water cooling structure for single water supply unit of divertor is put forward.The heat transfer performance of the EAST divertor cooling structure is numerically simulated and analyzed.Finally,the integral divertor is selected as the best solution.The calculation and structure analysis of the Halo electromagnetic force and the eddy current electromagnetic moment of each part of the divertor during the plasma vertical displacement event are analyzed.The designed divertor structure conforms to the design requirements.