Calculation of the heat flux in the lower divertor target plate using an infrared camera diagnostic system on the experimental advanced superconducting tokamak  

作　　者：Zhi-Xue Cui Xin Li Shuang-Bao Shu Jia-Rong Luo Mei-Wen Chen Yu-Zhong Zhang 

机构地区：[1]College of Information Sciences and Technology, Donghua University, Shanghai 201620, China [2]School of Instrument Science and Opto-electronics Engineering, Hefei University of Technology, Hefei 230009, China [3]Institute of Plasma Physics, Chinese Academy of Sciences, Hefei 230031, China

出　　处：《Nuclear Science and Techniques》2019年第6期63-69,共7页核技术（英文）

基　　金：supported by the National Natural Science Foundation of China(Nos.51505120 and 11105028);the National Magnetic Confinement Fusion Science Program of China(No.2015GB102004)

摘　　要：During the discharging of Tokamak devices, interactions between the core plasma and plasma-facing components (PFCs) may cause exorbitant heat deposition in the latter. This poses a grave threat to the lifetimes of PFCs materials. An infrared (IR) diagnostic system consisting of an IR camera and an endoscope was installed on an Experimental Advanced Superconducting Tokamak (EAST) to monitor the surface temperature of the lower divertor target plate (LDTP) and to calculate the corresponding heat flux based on its surface temperature and physical structure, via the finite element method. First, the temperature obtained by the IR camera was calibrated against the temperature measured by the built-in thermocouple of EAST under baking conditions to determine the true temperature of the LDTP. Next, based on the finite element method, a target plate model was built and a discretization of the modeling domain was carried out. Then, a heat conduction equation and boundary conditions were determined. Finally, the heat flux was calculated. The new numerical tool provided results similar to those for DFLUX;this is important for future work on related physical processes and heat flux control.During the discharging of Tokamak devices,interactions between the core plasma and plasma-facing components(PFCs) may cause exorbitant heat deposition in the latter. This poses a grave threat to the lifetimes of PFCs materials. An infrared(IR) diagnostic system consisting of an IR camera and an endoscope was installed on an Experimental Advanced Superconducting Tokamak(EAST) to monitor the surface temperature of the lower divertor target plate(LDTP) and to calculate the corresponding heat flux based on its surface temperature and physical structure, via the finite element method. First, the temperature obtained by the IR camera was calibrated against the temperature measured by the built-in thermocouple of EAST under baking conditions to determine the true temperature of the LDTP. Next, based on the finite element method, a target plate model was built and a discretization of the modeling domain was carried out. Then, a heat conduction equation and boundary conditions were determined. Finally, the heat flux was calculated. The new numerical tool provided results similar to those for DFLUX; this is important for future work on related physical processes and heat flux control.

关 键 词：EAST DIVERTOR TARGET PLATE Infrared camera Heat FLUX Finite element analysis 

分 类 号：TL[核科学技术]