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Investigation of edge impurity transport and divertor fluxes by toroidally localized lithium injection on EAST with EMC3-EIRENE

T Xie, S Y Dai, Z Sun, G Z Zuo, J S Hu, Y Feng, D Z Wang2019年Plasma Physics and Controlled FusionIF 2.2出版社

Three-dimensional (3D) edge fluid transport code EMC3-EIRENE has been employed to study lithium transport in the scrape-off layer (SOL) of EAST with the toroidally localized lithium injection experiment. The simulated profiles of the density of the Li ions show that the Li1+ ions mainly populate at the upper private region, while the Li2+ and Li3+ ions distribute at the upper X-point and upstream SOL regions. The synthetic 3D line-integrated LiII emission image obtained by EMC3-EIRENE is in reasonable agreement with the experimental profile measured by the CCD camera system on EAST. The impacts of the poloidal locations of Li injection (LI) have been studied to evaluate the variation of the Li impurity transport and emission behaviors, which shows a strong dependence on the poloidal position of LI. It is found that the LI at the outer midplane is the most effective location to radiate the power and reduce the heat flux deposition on the divertor targets, in comparison with the other poloidal injection locations.

日本語訳

三次元(3D)端部流体輸送コードEMC3-EIRENEを用いて、EAST装置のスクレイプオフ層(SOL)におけるリチウム輸送を、トロイダル方向に局在化したリチウム入射実験と組み合わせて研究した。Liイオン密度のシミュレーション結果は、Li1+イオンが主に下部ダイバータ領域に分布する一方、Li2+およびLi3+イオンは上部X点付近および上流SOL領域に分布することを示している。EMC3-EIRENEによる合成3Dライン積分LiII発光画像は、EASTのCCDカメラシステムで測定された実験画像と合理的に一致している。リチウム入射のポロイダル位置の影響を評価するため、異なるポロイダル位置からの入射に対する不純物輸送と発光特性の変化を系統的に調査した。その結果、リチウム輸送と発光分布は入射位置に強く依存することが明らかになった。特に、外側中平面からの入射が、ダイバータターゲットへの熱流束低減と放射パワー増大の観点から最も効果的であることが見出された。

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east高精度(タイトル一致)

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DivertorEASTImpurityLithiumImpurity transportEMC3-EIRENE
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