Validation of comprehensive magnetohydrodynamic hybrid simulations for Alfven eigenmode induced energetic particle transport in DIII-D plasmas

被引：45
|
作者：
Todo, Y. [1 ,2 ]
Van Zeeland, M. A. [3 ]
Bierwage, A. [4 ]
Heidbrink, W. W. [5 ]
Austin, M. E. [6 ]
机构：
[1] Natl Inst Nat Sci, Natl Inst Fus Sci, Toki, Gifu 5095292, Japan
[2] SOKENDAI Grad Univ Adv Studies, Dept Fus Sci, Toki, Gifu 5095292, Japan
[3] Gen Atom Co, San Diego, CA 92186 USA
[4] Japan Atom Energy Agcy, Aomori 0393212, Japan
[5] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA
[6] Univ Texas Austin, Inst Fus Studies, Austin, TX 78712 USA
来源：
NUCLEAR FUSION | 2015年 / 55卷 / 07期
关键词：
energetic particle; Alfven eigenmode; hybrid simulation; magnetohydrodynamics; GYROFLUID MODEL;
D O I：
10.1088/0029-5515/55/7/073020
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：
A multi-phase simulation, which is a combination of classical simulation and hybrid simulation for energetic particles interacting with a magnetohydrodynamic (MHD) fluid including neutral beam injection, slowing-down, and pitch angle scattering, is applied to DIII-D discharge #142111 where the fast ion spatial profile is significantly flattened due to multiple Alfven eigenmodes (AEs). The large fast ion pressure profile flattening observed experimentally is successfully reproduced by these first of a kind comprehensive simulations. Temperature fluctuations due to three of the dominant toroidal Alfven eigenmodes in the simulation results are compared in detail with electron cyclotron emission measurements in the experiment. It is demonstrated that the temperature fluctuation profile and the phase profile are in very good agreement with the measurement, and the amplitude is also in agreement within a factor of two. This level of agreement validates the multi-phase hybrid simulation for the prediction of AE activity and alpha particle transport in burning plasmas.
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页数：8
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