Measurement of Peeling Mode Edge Current Profile Dynamics

被引：12

作者：

Bongard, M. W. ^{[1
]}

Fonck, R. J. ^{[1
]}

Hegna, C. C. ^{[1
]}

Redd, A. J. ^{[1
]}

Schlossberg, D. J. ^{[1
]}

机构：

[1] Univ Wisconsin, Dept Engn Phys, Madison, WI 53706 USA

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 03期

关键词：

LOCALIZED MODES; POLARIMETRY; STABILITY; PEDESTAL; PROGRESS; TOKAMAK; PHYSICS;

D O I：

10.1103/PhysRevLett.107.035003

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Peeling modes, an instability mechanism underlying deleterious edge localized mode (ELM) activity in fusion-grade plasmas, are observed at the edge of limited plasmas in a low aspect ratio tokamak under conditions of high edge current density (J(edge) similar to 0.1 MA/m(2)) and low magnetic field (B similar to 0.1 T). They generate edge-localized, electromagnetic activity with low toroidal mode numbers n <= 3 and amplitudes that scale strongly with measured J(edge)/B instability drive, consistent with theory. ELM-like field-aligned, current-carrying filaments form from an initial current-hole Jedge perturbation that detach and propagate outward.

引用

页数：4

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