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

被引：22

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.

引用

页数：11

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