Simultaneous reduction of tungsten and rotation in the core region induced by RMP
| Autor: | H. Sheng, Y.W. Sun, C.X. Zhou, Y.M. Duan, W.M. Zhang, Y.Y. Li, L. Zhang, J.L. Chen, S.F. Mao, Y.Q. Liu, Q. Ma, T.H. Shi, C. Ye, P.C. Xie, X.M. Wu, M.N. Jia, N. Chu, H.H. Wang, Q. Zang, S. Gu, M.Y. Ye, the EAST Team |
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| Jazyk: | angličtina |
| Rok vydání: | 2024 |
| Předmět: | |
| Zdroj: | Nuclear Fusion, Vol 65, Iss 1, p 016009 (2024) |
| Druh dokumentu: | article |
| ISSN: | 1741-4326 0029-5515 |
| DOI: | 10.1088/1741-4326/ad8f44 |
| Popis: | Tungsten (W) impurity control is critical for plasma performance and a priority for ITER. The simultaneous reduction of W and rotation in the core region induced by resonant magnetic perturbations (RMPs) has been found and understood in EAST. A positive feedback loop between the W and rotation is first proposed, resulting in core W accumulation and high rotation even in low-torque plasma before the RMP application. This cycle can be reversed by the edge rotation braking induced by RMP, causing a significant simultaneous reduction of W concentration and rotation. These new mechanisms are based on several repeatable experiments and confirmed by the modeling results from TGYRO and NTVTOK. It provides a new understanding of the RMP effects on W and rotation and can be used for W and rotation control in future reactors. |
| Databáze: | Directory of Open Access Journals |
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