Comparison of small ELM characteristics and regimes in Alcator C-Mod, MAST and NSTX

被引：20
|
作者：
Maingi, R. [1 ]
Hubbard, A. E. [2 ]
Meyer, H. [3 ]
Hughes, J. W. [2 ]
Kirk, A. [3 ]
Maqueda, R. [4 ]
Terry, J. L. [2 ]
机构：
[1] Oak Ridge Natl Lab, Oak Ridge, TN 37831 USA
[2] MIT, Cambridge, MA 02139 USA
[3] EURATOM CCFE Culham, Culham, England
[4] Princeton Plasma Phys Lab, Princeton, NJ 08543 USA
来源：
NUCLEAR FUSION | 2011年 / 51卷 / 06期
基金：
英国工程与自然科学研究理事会;
关键词：
EDGE-LOCALIZED-MODES; SPHERICAL TORUS EXPERIMENT; SCRAPE-OFF-LAYER; H-MODE; ASDEX UPGRADE; HIGH-DENSITY; CONFINEMENT MODES; DIII-D; TOKAMAK; PEDESTAL;
D O I：
10.1088/0029-5515/51/6/063036
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：
We report on the status of a set of ITPA-coordinated experiments between the Alcator C-Mod, MAST and NSTX devices to compare the characteristics and access conditions of discharges with small edge-localized modes (ELMs). The small ELMs in C-Mod, MAST and one of the two small ELM types in NSTX exist when beta(pol)(ped) approached 10-15%, although the lower/upper limits of the operational windows differ. These small ELM regimes appear in diverted configurations very close to balanced double-null in each device. We classify these small ELMs as type II, based on the published characteristics from a number of previous studies. In addition, these type II ELMs in each device had multiple filaments with propagation in the co-I(p) or ion diamagnetic drift direction. Moreover, we conclude that these type II ELMs are distinct from the type V ELMs routinely observed in NSTX, which have one or two filaments and propagate in the electron diamagnetic drift direction.
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收藏
页数：11
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