Generation of blobs and holes in the edge of the ASDEX Upgrade tokamak

被引：79
|
作者：
Nold, B. [1 ]
Conway, G. D. [2 ]
Happel, T. [3 ]
Mueller, H. W. [2 ]
Ramisch, M. [1 ]
Rohde, V. [2 ]
Stroth, U. [1 ]
机构：
[1] Univ Stuttgart, Inst Plasmaforsch, D-70569 Stuttgart, Germany
[2] Max Planck Inst Plasma Phys, EURATOM Assoc, D-85748 Garching, Germany
[3] CIEMAT, EURATOM Assoc, Lab Nacl Fus, E-28040 Madrid, Spain
来源：
PLASMA PHYSICS AND CONTROLLED FUSION | 2010年 / 52卷 / 06期
关键词：
SCRAPE-OFF LAYER; INTERMITTENT CONVECTIVE-TRANSPORT; MAGNETICALLY CONFINED DEVICES; DIII-D TOKAMAK; PLASMA TURBULENCE; BOUNDARY; FLUCTUATIONS; UNIVERSALITY; FUSION;
D O I：
10.1088/0741-3335/52/6/065005
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 intermittent character of turbulent transport is investigated with Langmuir probes in the scrape-off layer and across the separatrix of ASDEX Upgrade Ohmic discharges. Radial profiles of plasma parameters are in reasonable agreement with results from other diagnostics. The probability density functions of ion-saturation current fluctuations exhibit a parabolic relation between skewness and kurtosis. Intermittent blobs and holes are observed outside and inside the nominal separatrix, respectively. They seem to be born at the edge of the plasma and are not the foothills of avalanches launched in the plasma core. A strong shear flow was observed 1 cm radially outside the location where blobs and holes seem to be generated.
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收藏
页数：12
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