Design of a 3D-printed liquid lithium divertor target plate and its interaction with high-density plasma  

作　　者：苑聪聪 叶宗标 刘建星 郭恒鑫 彭怡超 廖加术 陈波 陈建军 王宏彬 韦建军 张秀杰 芶富均 Congcong YUAN;Zongbiao YE;Jianxing LIU;Hengxin GUO;Yichao PENG;Jiashu LIAO;Bo CHEN;Jianjun CHEN;Hongbin WANG;Jianjun WEI;Xiujie ZHANG;Fujun GOU(Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610064,People’s Republic of China;Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610064,People’s Republic of China;Southwestern Institute of Physics,Chengdu 610064,People’s Republic of China)

机构地区：[1]Institute of Nuclear Science and Technology,Sichuan University,Chengdu 610064,People’s Republic of China [2]Institute of Atomic and Molecular Physics,Sichuan University,Chengdu 610064,People’s Republic of China [3]Southwestern Institute of Physics,Chengdu 610064,People’s Republic of China

出　　处：《Plasma Science and Technology》2024年第8期112-120,共9页等离子体科学和技术（英文版）

基　　金：funded by the China Postdoctoral Science Foundation(No.2019M663487);the National Key Research and Development Program of China(No.2022YFE03130000)。

摘　　要：A liquid Li divertor is a promising alternative for future fusion devices.In this work a new divertor model is proposed,which is processed by 3D-printing technology to accurately control the size of the internal capillary structure.At a steady-state heat load of 10 MW m^(-2),the thermal stress of the tungsten target is within the bearing range of tungsten by finite-element simulation.In order to evaluate the wicking ability of the capillary structure,the wicking process at 600℃ was simulated by FLUENT.The result was identical to that of the corresponding experiments.Within 1 s,liquid lithium was wicked to the target surface by the capillary structure of the target and quickly spread on the target surface.During the wicking process,the average wicking mass rate of lithium should reach 0.062 g s^(-1),which could even supplement the evaporation requirement of liquid lithium under an environment>950℃.Irradiation experiments under different plasma discharge currents were carried out in a linear plasma device(SCU-PSI),and the evolution of the vapor cloud during plasma irradiation was analyzed.It was found that the target temperature tends to plateau despite the gradually increased input current,indicating that the vapor shielding effect is gradually enhanced.The irradiation experiment also confirmed that the 3D-printed tungsten structure has better heat consumption performance than a tungsten mesh structure or multichannel structure.These results reveal the application potential and feasibility of a 3D-printed porous capillary structure in plasma-facing components and provide a reference for further liquid-solid combined target designs.

关 键 词：fusion DIVERTOR 3D-printing TUNGSTEN LITHIUM liquid metal 

分 类 号：TL62[核科学技术—核技术及应用] TP391.73[自动化与计算机技术—计算机应用技术]