Parametric study of helicon wave current drive in CFETR

被引：5
作者：
Wu, Xianshu [1 ]
Li, Jingchun [1 ]
Chen, Jiale [2 ]
Xu, Guosheng [2 ]
Dong, Jiaqi [3 ]
Wang, Zhanhui [3 ]
Sun, Aiping [3 ]
Zhong, Wulv [3 ]
机构：
[1] Southern Univ Sci & Technol, Dept Earth & Space Sci, Shenzhen 518055, Peoples R China
[2] Chinese Acad Sci, Inst Plasma Phys, Hefei, Anhui, Peoples R China
[3] Southwestern Inst Phys, Chengdu 610041, Peoples R China
来源：
NUCLEAR FUSION | 2023年 / 63卷 / 10期
基金：
国家重点研发计划; 中国国家自然科学基金;
关键词：
wave heating; current drive; radio frequency; helicon; fast wave; lower hybrid wave;
D O I：
10.1088/1741-4326/acf231
中图分类号：
O35 [流体力学]; O53 [等离子体物理学];
学科分类号：
070204 ; 080103 ; 080704 ;
摘要：
This paper evaluates the feasibility of helicon current drive (HCD) in a hybrid scenario for the China Fusion Engineering Test Reactor (CFETR). Utilizing the GENRAY/CQL3D package, a large number of simulations (over 5000) were conducted, with parametric scans in the antenna's poloidal position, launched parallel refractive index (n|| ), and wave frequency. The analysis reveals that helicon has excellent accessibility under reactor-level conditions, and smaller n|| and higher wave frequency result in enhanced wave absorption. The simulations demonstrate an optimal launched n|| of approximately 1.6 for the CFETR hybrid scenario, with helicon achieving a maximum drive efficiency of 2.8 x 1019 A & BULL;W-1 & BULL;m-2. The best launch position is found to be within a poloidal angle range of 25 degrees to 65 degrees. Additionally, it is preferable to have a narrow n|| spectrum for wave absorption when operating below the threshold value of & UDelta;n|| (& SIM;0.6), beyond which the effect of & UDelta;n|| on wave absorption is negligible. This study provides valuable insights into the potential application of HCD in CFETR.
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页数：10
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