Spatial structure of scrape-off-layer filaments near the midplane and X-point regions of Alcator-C-Mod

被引：41

作者：

Terry, J. L. ^{[1
]}

Zweben, S. J. ^{[2
]}

Umansky, M. V. ^{[3
]}

Cziegler, I. ^{[1
]}

Grulke, O. ^{[4
]}

LaBombard, B. ^{[1
]}

Stotler, D. P. ^{[2
]}

机构：

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

[2] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA

[3] Lawrence Livermore Natl Lab, Livermore, CA 94550 USA

[4] Max Planck Inst Plasma Phys, Greifswald, Germany

来源：

JOURNAL OF NUCLEAR MATERIALS | 2009年 / 390-91卷

关键词：

TURBULENCE; TRANSPORT;

D O I：

10.1016/j.jnucmat.2009.01.152

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Movies of edge turbulence at both the outboard midplane and the region outboard of the typical lower X-point location in C-Mod have been obtained using gas-puff-imaging together with fast-framing cameras. Intermittent turbulence structures, typically referred to as blobs or filaments, are observed in both locations. Near the midplane the filaments are roughly circular in cross-section, while in the X-point region they are highly elongated. Filament velocities in this region are similar to 3x faster than the radial velocities at the midplane, in a direction roughly outward across the local flux surfaces. The observations are consistent with the picture that the filaments arise in the outboard region and, as a consequence of the rapid parallel diffusion of the potential perturbations, map along field lines. Results from a 3D BOUT turbulence simulation reproduce many of the spatial features observed in the experiment. (C) 2009 Elsevier B.V. All rights reserved.

引用

页码：339 / 342

页数：4

共 18 条

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