Quasi-coherent fluctuations limiting the pedestal growth on Alcator C-Mod: experiment and modelling

被引：37

作者：

Diallo, A. ^{[1
]}

Hughes, J. W. ^{[2
]}

Baek, S-G. ^{[2
]}

LaBombard, B. ^{[2
]}

Terry, J. ^{[2
]}

Cziegler, I. ^{[3
]}

Hubbard, A. ^{[2
]}

Davis, E. ^{[2
]}

Walk, J. ^{[2
]}

Delgado-Aparicio, L. ^{[1
]}

Reinke, M. L. ^{[2
]}

Theiler, C. ^{[2
]}

Churchill, R. M. ^{[2
]}

Edlund, E. M. ^{[1
]}

Canik, J. ^{[4
]}

Snyder, P. ^{[5
]}

Greenwald, M. ^{[2
]}

White, A. ^{[2
]}

机构：

[1] Princeton Univ, Princeton Plasma Phys Lab, Princeton, NJ 08544 USA

[2] MIT, Plasma Sci & Fus Ctr, Cambridge, MA 02139 USA

[3] Univ Calif San Diego, Energy Res Ctr, San Diego, CA 92103 USA

[4] Oak Ridge Natl Lab, Oak Ridge, TN USA

[5] Gen Atom Co, San Diego, CA USA

来源：

NUCLEAR FUSION | 2015年 / 55卷 / 05期

关键词：

ELM physics; H-Mode; tokamaks; edge turbulence; kinetic ballooning mode; MHD instabilities; microinstabilities; CONFINEMENT;

D O I：

10.1088/0029-5515/55/5/053003

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：

Performance predictions for future fusion devices rely on an accurate model of the pedestal structure. The candidate for predictive pedestal structure is EPED, and it is imperative to test the underlying hypotheses to further gain confidence for ITER projections. Here, we present experimental work testing one of the EPED hypotheses, namely the existence of a soft limit set by microinstabilities such as the kinetic ballooning mode. This work extends recent work on Alactor C-Mod (Diallo et al 2014 Phys. Rev. Lett. 112 115001), to include detailed measurements of the edge fluctuations and comparisons of edge simulation codes and experimental observations.

引用

页数：11

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