Numerical simulation of fueling pellet ablation and transport in the EAST H-mode discharge  

作　　者：Wan-Ting Chen Ji-Zhong Sun Fang Gao Lei Peng De-Zhen Wang 陈婉婷;孙继忠;高放;彭磊;王德真(Key Laboratory of Materials Modification by Laser,Ion,and Electron Beams(Ministry of Education),School of Physics,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]Key Laboratory of Materials Modification by Laser,Ion,and Electron Beams(Ministry of Education),School of Physics,Dalian University of Technology,Dalian 116024,China

出　　处：《Chinese Physics B》2022年第7期420-427,共8页中国物理B（英文版）

基　　金：the National Key R&D Program of China under Grant Nos.2017YFE0301100 and 2019YFE03030004;the National Natural Science Foundation of China under Grant No.11575039;Users with Excellence Program of Hefei Science Center CAS(2020HSCUE010)。

摘　　要：To understand the effect of injected deuterium(D)pellets on background plasma,the ablation of D pellets and the transport of D species in both atomic and ionic states in the EAST device are simulated using a modified dynamic neutral gas shield model combined with the edge plasma code SOLPS-ITER.The simulation results show that there is a phenomenon of obvious atomic deposition in the scrape-off layer(SOL)after pellet injection,which depends strongly on the injection velocity.With increasing injection velocity,the atomic density in the SOL decreases evidently and the deposition time is relatively shortened.Possible effects for triggering of edge localized modes(ELMs)by D and Li pellets are also discussed.With the same pellet size and injection velocity,the maximum perturbation pressure caused by D pellets is obviously higher.It is found that the resulting maximum perturbed pressure is remarkably enhanced when the injection velocity is reduced from 300 m/s to 100 m/s for a pellet with a cross section of 1.6 mm,which indicates that the injection velocity is important for ELM pacing.This work can provide reasonable guidance for choosing pellet parameters for fueling and ELM triggering.

关 键 词：deuterium pellet FUELING EAST SOLPS-ITER 

分 类 号：TL631.24[核科学技术—核技术及应用]