Development of electromagnetic pellet injector for disruption mitigation of tokamak plasma  

作　　者：李峰 陈忠勇 夏胜国 严伟 张维康 唐俊辉 李由 钟昱 方建港 刘凡溪 邹癸南 喻寅龙 聂子森 江中和 王能超 丁永华 潘垣 J-TEXT team Feng Li;Zhong-Yong Chen;Sheng-Guo Xia;Wei Yan;Wei-Kang Zhang;Jun-Hui Tang;You Li;Yu Zhong;Jian-Gang Fang;Fan-Xi Liu;Gui-Nan Zou;Yin-Long Yu;Zi-Sen Nie;Zhong-He Jiang;Neng-Chao Wang;Yong-Hua Ding;Yuan Pan;J-TEXT team(International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China;Key Laboratory of Pulsed Power Technology Ministry of Education Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China)

机构地区：[1]International Joint Research Laboratory of Magnetic Confinement Fusion and Plasma Physics,State Key Laboratory of Advanced Electromagnetic Engineering and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China [2]Key Laboratory of Pulsed Power Technology Ministry of Education Huazhong University of Science and Technology,School of Electrical and Electronic Engineering,Huazhong University of Science and Technology,Wuhan 430074,China

出　　处：《Chinese Physics B》2023年第7期29-36,共8页中国物理B（英文版）

基　　金：Project supported by the National Magnetic Confinement Fusion Energy Research and Development Program of China (Grant No. 2019YFE03010004);the National Natural Science Foundation of China (Grant Nos. 12175078, 11905077, and 51821005)

摘　　要：Disruption remains to be a serious threat to large tokamaks like the International Thermonuclear Experimental Reactor(ITER).The injection speed of disruption mitigation systems(DMS)driven by high pressure gas is limited by the sound speed of the propellant gas.When extrapolating to ITER-like tokamaks,long overall reaction duration and shallow penetration depth due to low injection speed make it stricter for plasma control system to predict the impending disruptions.Some disruptions with a short warning time may be unavoidable.Thus,a fast time response and high injection speed DMS is essential for large scale devices.The electromagnetic pellet-injection(EMPI)system is a novel massive material injection system aiming to provide rapid and effective disruption mitigation.Based on the railgun concept,EMPI can accelerate the payload to over 1000 m/s and shorten the overall reaction time to a few milliseconds.To verify the injection ability and stability of the EMPI,the prototype injector EMPI-1 has been designed and assembled.The preliminary test has been carried out using a 5.9 g armature to propel a dummy pellet and the results suggest that the EMPI configuration has a great potential to be the DMS of the large scale fusion devices.

关 键 词：TOKAMAK disruption mitigation system electromagnetic pellet-injection(EMPI) 

分 类 号：TL631.24[核科学技术—核技术及应用]