Numerical investigation of ECCD under the CFETR concept design parameters

doi:10.1016/j.fusengdes.2022.113236

	Numerical investigation of ECCD under the CFETR concept design parameters
	He, L. H.1; Zheng, P. W.1; Zheng, Z. H.3; Chen, J. L.1,2; Yu, T.1
刊名	FUSION ENGINEERING AND DESIGN
	2022-09-01
卷号	182
关键词	CFETR EC waves ECCD Current drive efficiency
ISSN号	0920-3796
DOI	10.1016/j.fusengdes.2022.113236
通讯作者	Zheng, P. W.(pwzheng@usc.edu.cn) ; Yu, T.(yutao29@sina.com)
英文摘要	RF power in the electron cyclotron (EC) frequency range is planned to be injected to the plasmas of China Fusion Engineering Test Reactor (CFETR). Numerical investigation for electron cyclotron current drive (ECCD) is performed under the parameters of the latest/final version of the CFETR concept design (R = 7.2 m, a = 2.2 m, BT = 6.5 T). The TORAY-GA ray-tracing code is used to optimize frequency and launcher ports of EC waves. It is found that both 240 GHz and 250 GHz EC waves can meet the desired current drive demand in the target radial region (rho <= 0.40). The 240 GHz EC wave is the optimum candidate. It can be launched either from equatorial launcher (EL) port, upper launcher (UL) port or top launcher (TL) port. EC waves with frequency equal to or larger than 250 GHz will be suffered strong parasitic second harmonic absorption if it is launched from EL port. Except for 250 GHz wave launched from EL port, ECCD efficiency increases with the increasing of EC frequency in the range of 190 - 250 GHz. The maximum CD efficiency gamma CD --- n20RIec/Pin can reach 0.3 taking account for improvement of the CD efficiency about 20% enhanced by momentum conserving correction in the central radial region (rho <= 0.20), either by 240 GHz EL-ECCD or 240/250 GHz UL-ECCD launching from (Ri, Zi) = (8.2, 4.5) m. Large toroidal incident angle alpha is needed for higher EC frequency to obtain an efficient CD efficiency. Necessary and sufficient conditions for successful and effective TL-ECCD are given. Compared to UL-ECCD, TL-ECCD does not significantly improve the efficiency of ECCD in the mid-radius region (rho = 0.4 - 0.6). Most cases of TL-ECCD significantly improve the efficiency of ECCD in the mid-radius region compared with EL-ECCD, but some cases does not. It is different from the results of previous theoretical simulations, in which TL-ECCD shows significantly improve ECCD efficiency than EL launcher. These findings are of significance for design of an efficient ECCD system under the CFETR design parameters.
资助项目	National MCF Energy R&D Program of China[2022YFE03090001] ; National MCF Energy R&D Program of China[2022YFE03070003] ; Natural Science Foundation of Hunan Province[2021JJ30569] ; Natural Science Foundation of Hunan Province[2018JJ2320] ; Excellent Youth Project of Hunan Education Department[19B483] ; Doctoral Initiation Fund Project of University of South China[190XQD114] ; Hunan Nuclear Fusion International Science and Technology Innovation Cooperation Base[2018WK4009] ; Key Laboratory of Magnetic Confinement Nuclear Fusion Research in Hengyang[2018KJ108] ; Opening Project of Nuclear Fuel Cycle Technology and Equipment, University of South China[2019KFZ02] ; Opening Project of Nuclear Fuel Cycle Technology and Equipment, University of South China[2019KFQ12]
WOS关键词	CYCLOTRON-CURRENT-DRIVE ; WAVES ; GENERATION ; PHYSICS
WOS研究方向	Nuclear Science & Technology
语种	英语
出版者	ELSEVIER SCIENCE SA
WOS记录号	WOS:000878506700002
资助机构	National MCF Energy R&D Program of China ; Natural Science Foundation of Hunan Province ; Excellent Youth Project of Hunan Education Department ; Doctoral Initiation Fund Project of University of South China ; Hunan Nuclear Fusion International Science and Technology Innovation Cooperation Base ; Key Laboratory of Magnetic Confinement Nuclear Fusion Research in Hengyang ; Opening Project of Nuclear Fuel Cycle Technology and Equipment, University of South China
内容类型	期刊论文
源URL	[http://ir.hfcas.ac.cn:8080/handle/334002/130152]
专题	中国科学院合肥物质科学研究院
通讯作者	Zheng, P. W.; Yu, T.
作者单位	1.Univ South China, Coll Nucl Sci & technol, Hengyang 421001, Hunan, Peoples R China 2.Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China 3.Southwestern Inst Phys, Chengdu 610041, Sichuan, Peoples R China
推荐引用方式 GB/T 7714	He, L. H.,Zheng, P. W.,Zheng, Z. H.,et al. Numerical investigation of ECCD under the CFETR concept design parameters[J]. FUSION ENGINEERING AND DESIGN,2022,182.
APA	He, L. H.,Zheng, P. W.,Zheng, Z. H.,Chen, J. L.,&Yu, T..(2022).Numerical investigation of ECCD under the CFETR concept design parameters.FUSION ENGINEERING AND DESIGN,182.
MLA	He, L. H.,et al."Numerical investigation of ECCD under the CFETR concept design parameters".FUSION ENGINEERING AND DESIGN 182(2022).