Top Launch for Higher Off-axis Electron Cyclotron Current Drive Efficiency

被引：10

作者：

Chen, Xi ^{[1
]}

Prater, Ron ^{[1
]}

Petty, Craig ^{[1
]}

Lohr, John ^{[1
]}

Su, David ^{[1
]}

Lao, Lang ^{[1
]}

Chan, Vincent ^{[2
]}

机构：

[1] Gen Atom, POB 85608, San Diego, CA 92186 USA

[2] Univ Sci & Technol China, Hefei 230026, Anhui, Peoples R China

来源：

20TH JOINT WORKSHOP ON ELECTRON CYCLOTRON EMISSION AND ELECTRON CYCLOTRON RESONANCE HEATING (EC20) | 2019年 / 203卷

关键词：

D O I：

10.1051/epjconf/201920301004

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：

Efficient off-axis current drive is crucial for economic, steady-state tokamak fusion power plants. "Top Launch" electron cyclotron current drive (ECCD) is one promising method for driving strong off-axis current to achieve the desired broad current profile for the Advanced Tokamak regime. New simulations show that by launching the electron cyclotron (EC) waves downwards (or upwards) nearly parallel to the resonance plane with a large toroidal steering, higher current drive efficiency can be obtained at large radii owing to the large Doppler shift, wave-particle interactions on HFS of the plasma, and the long absorption path. Implementations on CFETR and DIII-D are simulated identifying clear benefits and optimal configurations. The design of a prototype test being installed on DIII-D is presented, which will experimentally validate whether top launch ECCD can be an improved efficiency current drive technique for future fusion reactors.

引用

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