Predicting rotation for ITER via studies of intrinsic torque and momentum transport in DIII-D

被引：34
作者：
Chrystal, C. [1 ]
Grierson, B. A. [2 ]
Staebler, G. M. [1 ]
Petty, C. C. [1 ]
Solomon, W. M. [1 ]
deGrassie, J. S. [1 ]
Burrell, K. H. [1 ]
Tala, T. [3 ]
Salmi, A. [3 ]
机构：
[1] Gen Atom, POB 85608, San Diego, CA 92186 USA
[2] Princeton Plasma Phys Lab, POB 451, Princeton, NJ 08543 USA
[3] VTT, VTT Tech Res Ctr Finland, POB 1000, FI-02044 Espoo, Finland
来源：
PHYSICS OF PLASMAS | 2017年 / 24卷 / 05期
关键词：
TOROIDAL ROTATION; TOKAMAK; PLASMA; MODE;
D O I：
10.1063/1.4979194
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：
Experiments at the DIII-D tokamak have used dimensionless parameter scans to investigate the dependencies of intrinsic torque and momentum transport in order to inform a prediction of the rotation profile in ITER. Measurements of intrinsic torque profiles and momentum confinement time in dimensionless parameter scans of normalized gyroradius and collisionality are used to predict the amount of intrinsic rotation in the pedestal of ITER. Additional scans of T-e/T-i and safety factor are used to determine the accuracy of momentum flux predictions of the quasi-linear gyrokinetic code TGLF. In these scans, applications of modulated torque are used to measure the incremental momentum diffusivity, and results are consistent with the E x B shear suppression of turbulent transport. These incremental transport measurements are also compared with the TGLF results. In order to form a prediction of the rotation profile for ITER, the pedestal prediction is used as a boundary condition to a simulation that uses TGLF to determine the transport in the core of the plasma. The predicted rotation is approximate to 20 krad/s in the core, lower than in many current tokamak operating scenarios. TGLF predictions show that this rotation is still significant enough to have a strong effect on confinement via E x B shear. Published by AIP Publishing.
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页数：11
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