Key effects on the confinement improvement of the ASDEX Upgrade hybrid scenario

被引：14

作者：

Jian, Xiang ^{[1
,2
]}

Chan, Vincent S. ^{[3
,4
]}

Chen, Jiale ^{[5
]}

Bock, Alexander ^{[6
]}

Zohm, Hartmut ^{[6
]}

Fable, Emiliano ^{[6
]}

Reisner, Maximilian ^{[6
]}

Guo, Wenfeng ^{[5
]}

Zhuang, Ge ^{[3
]}

机构：

[1] Huazhong Univ Sci & Technol, Sch Elect & Elect Engn, State Key Lab Adv Electromagnet Engn & Technol, Wuhan 430074, Hubei, Peoples R China

[2] Univ Calif San Diego, Ctr Energy Res, La Jolla, CA 92093 USA

[3] Univ Sci & Technol China, Sch Phys Sci, Hefei 230026, Anhui, Peoples R China

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

[5] Chinese Acad Sci, Inst Plasma Phys, Hefei 230031, Anhui, Peoples R China

[6] Max Planck Inst Plasma Phys, Boltzmannstr 2, D-85748 Garching, Germany

来源：

NUCLEAR FUSION | 2019年 / 59卷 / 10期

基金：

国家重点研发计划;

关键词：

hybrid scenario; transport modeling; TGLF; AUG; RECONSTRUCTION; TRANSPORT;

D O I：

10.1088/1741-4326/ab3b44

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：

Transport analysis of a fully non-inductive high performance ASDEX Upgrade (AUG) hybrid mode discharge (Bock 2017 Nucl. Fusion 57 126041) is performed using a gyro-fluid transport code and a gyro-kinetic stability code. It is shown that the confluence of several mechanisms is essential for the improvement in core confinement. In addition to rotation shear, low magnetic shear, which is a common characteristic near the magnetic axis of a hybrid scenario, is found to be favorable for both electromagnetic and alpha stabilization. Together they facilitate the conditions for fast ions to establish a strong local internal transport barrier by providing additional dilution effect and enhancement of alpha stabilization. This study provides a complete picture and demonstrates that a quasilinear turbulent model is capable of quantitatively matching the experimental temperature profiles across the entire core of a hybrid mode discharge.

引用

页数：8

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