Effects of triangularity on the fusion performance of CFETR

doi:10.1088/1741-4326/aba450

	Effects of triangularity on the fusion performance of CFETR
	Zhou, Cheng-Xi 5; Chen, Jia-Le 4; Chan, V. S.2,3; Jian, Xiang 1; Zhuang, G.3; Zhu, Yi-Ren 5
刊名	NUCLEAR FUSION
	2020-09-01
卷号	60
关键词	triangularity turbulence collisionality reversed magnetic shear thermo-diffusion CFETR integrated modeling
ISSN号	0029-5515
DOI	10.1088/1741-4326/aba450
通讯作者	Chan, V. S.(chanvs@ustc.edu.cn) ; Zhuang, G.(gezhuang@ustc.edu.cn)
英文摘要	An important task of the China Fusion Engineering Test Reactor physics design is to develop operation scenarios with high fusion power (1 GW), high bootstrap current fraction for steady-state and a plasma edge compatible with heat and particle exhaust. To achieve these goals, triangularity (delta) effects on the fusion performance of two candidate scenarios, with or without reversed magnetic shear (RS), namely conventional H-mode and RS H-mode, are evaluated using core-edge coupled integrated modeling in this paper. For fixed pedestal density, it is shown that higher delta is favorable for higher fusion performance in the conventional H-mode scenario while the fusion performance decreases with increasing delta in the RS H-mode scenario. In conventional H-mode, the higher fusion performance at high delta mainly comes from a higher pedestal temperature as predicted by EPED in combination with stiff core kinetic profiles. In the RS H-mode scenario with a local reversed shear region, the profiles are non-stiff and a strong internal transport barrier (ITB) exists at low delta. This results in higher density and temperature inside the ITB for low delta, leading to higher fusion power. If the pedestal temperature is kept fixed, in both scenarios the significant increase in pedestal density, which extends into the core, dominates at high delta and leads to much higher fusion power. For conventional H-mode, destabilization from increasing delta is partially balanced by stabilization due to increasing nu. Since the normalized heat sources are quite similar, it results in minimal changes in the temperature profiles except for the lowest density case. For RS H-mode, destabilization from increasing delta is approximately balanced by stabilization due to increasing nu in foot region, but a strong temperature ITB is still evident for low delta. The ability to take advantage of the high pedestal density in conventional H-mode and reversed shear scenario depends on its compatibility with edge density requirements from efficient heat and particle exhaust. Transport analysis is presented to elucidate the roles of delta, collisionality and magnetic shear in altering the profiles and the ITB, which contribute to the different behavior in the two scenarios.
资助项目	National Magnetic Confinement Fusion Program of China[2017YFE0300500] ; National Magnetic Confinement Fusion Program of China[2017YFE0300501] ; US DOE Office of Fusion Energy Science[DE-SC0017992] ; NSFC[U1967206] ; NSFC[51821005]
WOS关键词	INTERNAL TRANSPORT BARRIER ; ELMY H-MODES ; ASPECT-RATIO ; CONFINEMENT ; DENSITY ; LIMITS
WOS研究方向	Physics
语种	英语
出版者	IOP PUBLISHING LTD
WOS记录号	WOS:000563251500001
资助机构	National Magnetic Confinement Fusion Program of China ; US DOE Office of Fusion Energy Science ; NSFC
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/70613]
专题	中国科学院合肥物质科学研究院
通讯作者	Chan, V. S.; Zhuang, G.
作者单位	1.Univ Calif San Diego, Ctr Energy Res, La Jolla, CA 92093 USA 2.Gen Atom, POB 85608, San Diego, CA 92186 USA 3.Univ Sci & Technol China, Sch Phys Sci, Dept Engn & Appl Phys, Hefei 230026, Peoples R China 4.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Peoples R China 5.Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Peoples R China
推荐引用方式 GB/T 7714	Zhou, Cheng-Xi,Chen, Jia-Le,Chan, V. S.,et al. Effects of triangularity on the fusion performance of CFETR[J]. NUCLEAR FUSION,2020,60.
APA	Zhou, Cheng-Xi,Chen, Jia-Le,Chan, V. S.,Jian, Xiang,Zhuang, G.,&Zhu, Yi-Ren.(2020).Effects of triangularity on the fusion performance of CFETR.NUCLEAR FUSION,60.
MLA	Zhou, Cheng-Xi,et al."Effects of triangularity on the fusion performance of CFETR".NUCLEAR FUSION 60(2020).