Study of the L-mode tokamak plasma "shortfall" with local and global nonlinear gyrokinetic δf particle-in-cell simulation

被引：12

作者：

Chowdhury, J. ^{[1
]}

Wan, Weigang ^{[1
]}

Chen, Yang ^{[1
]}

Parker, Scott E. ^{[1
]}

Groebner, Richard J. ^{[2
]}

Holland, C. ^{[3
]}

Howard, N. T. ^{[4
]}

机构：

[1] Univ Colorado, Dept Phys, Boulder, CO 80309 USA

[2] Gen Atom Co, San Diego, CA 92186 USA

[3] Univ Calif San Diego, La Jolla, CA 92093 USA

[4] ORISE, Oak Ridge, TN 37831 USA

来源：

PHYSICS OF PLASMAS | 2014年 / 21卷 / 11期

关键词：

ZONAL FLOW; TURBULENCE; DRIVEN;

D O I：

10.1063/1.4901031

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：

The delta f particle-in-cell code GEM is used to study the transport "shortfall" problem of gyrokinetic simulations. In local simulations, the GEM results confirm the previously reported simulation results of DIII-D [Holland et al., Phys. Plasmas 16, 052301 (2009)] and Alcator C-Mod [Howard et al., Nucl. Fusion 53, 123011 (2013)] tokamaks with the continuum code GYRO. Namely, for DIII-D the simulations closely predict the ion heat flux at the core, while substantially underpredict transport towards the edge; while for Alcator C-Mod, the simulations show agreement with the experimental values of ion heat flux, at least within the range of experimental error. Global simulations are carried out for DIII-D L-mode plasmas to study the effect of edge turbulence on the outer core ion heat transport. The edge turbulence enhances the outer core ion heat transport through turbulence spreading. However, this edge turbulence spreading effect is not enough to explain the transport underprediction. (C) 2014 AIP Publishing LLC.

引用

页数：11

共 41 条

[1] A verification of the gyrokinetic microstability codes GEM, GYRO, and GS2 [J].