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A stationary long-pulse ELM-absent H-mode regime in EAST

文献类型：期刊论文

作者Ye, Y.1,2; Xu, G. S.1; Wan, B. N.1; Chen, R.1; Yan, N.1; Guo, H. Y.1,3; Shao, L. M.1; Yang, Q. Q.1,2; Wang, H. Q.1,3; Zhang, W.1
刊名NUCLEAR FUSION
出版日期2017-08-01
卷号57期号:8
关键词Elm-absent Elm-free H-mode Edge Coherent Mode High-energy Confinement
DOI10.1088/1741-4326/aa7809
文献子类Article
英文摘要A stationary edge-localized mode (ELM)-absent H-mode regime, with an electrostatic edge coherent mode (ECM) which resides in the pedestal region, has been achieved in the EAST tokamak recently. This regime allows the operation of a nearly fully noninductive long pulse (> 15 s), exhibiting a relatively high pedestal and good global energy confinement with H-98,H- y2 near 1.2, and excellent impurity control. Furthermore, this regime is mostly obtained with a 4.6 GHz lower hybrid current drive (LHCD) or counter-current neutral beam injection (NBI), plus electron cyclotron resonance heating, and an extensive lithium wall coating. This stationary ELM-absent H-mode regime transits to a stationary small ELM H-mode regime, and upon additional heating power from the 2.45 GHz LHCD, an ion cyclotron resonant frequency or co-current NBI is applied (under 4.6 GHz LHCD heating background). A slight change of the plasma configuration also makes the small ELMs reappear. The experimental observations suggest that a long-pulse ELM-absent regime can be induced by the ECM, which exhibits strong electrostatic fluctuations and may provide a channel for continuous particle (especially impurities) and heat exhaust across the pedestal. The ECM exists in the collisionality of nu(e) (*)= 2.5-4 and the pressure gradient |del P| = | dP/d(rho)| = 100-200 (kPa), which is in good agreement with the previous simulation of GYRO. This ELM-absent H-mode regime with ECM may offer a suitable candidate for high-performance, steady-state H-mode operation in future fusion reactors.
WOS关键词ALCATOR C-MOD ; EDGE LOCALIZED MODES ; CONFINEMENT-MODE ; ASDEX UPGRADE ; DENSITY PROFILE ; DIII-D ; PLASMAS ; TOKAMAK ; STABILITY ; JET
WOS研究方向Physics
语种英语
WOS记录号WOS:000405556100003
资助机构National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Magnetic Confinement Fusion Science Program of China(2015GB101000 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; National Natural Science Foundation of China(11505220 ; 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源URL[http://ir.hfcas.ac.cn:8080/handle/334002/33469]  
专题合肥物质科学研究院_中科院等离子体物理研究所
作者单位1.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China
2.Univ Sci & Technol China, Grad Sch, Sci Isl Branch, Hefei 230031, Peoples R China
3.Gen Atom, POB 85608, San Diego, CA 92186 USA
推荐引用方式
GB/T 7714		 Ye, Y.,Xu, G. S.,Wan, B. N.,et al. A stationary long-pulse ELM-absent H-mode regime in EAST[J]. NUCLEAR FUSION,2017,57(8).
APA Ye, Y..,Xu, G. S..,Wan, B. N..,Chen, R..,Yan, N..,...&EAST Team.(2017).A stationary long-pulse ELM-absent H-mode regime in EAST.NUCLEAR FUSION,57(8).
MLA Ye, Y.,et al."A stationary long-pulse ELM-absent H-mode regime in EAST".NUCLEAR FUSION 57.8(2017).

入库方式： OAI收割

来源：合肥物质科学研究院

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