Measurement of neoclassically predicted edge current density at ASDEX Upgrade

被引：44

作者：

Dunne, M. G. ^{[1
]}

McCarthy, P. J. ^{[1
]}

Wolfrum, E. ^{[2
]}

Fischer, R. ^{[2
]}

Giannone, L. ^{[2
]}

Burckhart, A. ^{[2
]}

机构：

[1] Univ Coll Cork, Assoc Euratom DCU, Dept Phys, Cork, Ireland

[2] EURATOM, Max Planck Inst Plasmaphys, D-85748 Garching, Germany

来源：

NUCLEAR FUSION | 2012年 / 52卷 / 12期

关键词：

LOCALIZED MODES; EQUILIBRIUM; STABILITY; ELMS; ITER;

D O I：

10.1088/0029-5515/52/12/123014

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：

Experimental confirmation of neoclassically predicted edge current density in an ELMy H-mode plasma is presented. Current density analysis using the CLISTE equilibrium code is outlined and the rationale for accuracy of the reconstructions is explained. Sample profiles and time traces from analysis of data at ASDEX Upgrade are presented. A high time resolution is possible due to the use of an ELM-synchronization technique. Additionally, the flux-surface-averaged current density is calculated using a neoclassical approach. Results from these two separate methods are then compared and are found to validate the theoretical formula. Finally, several discharges are compared as part of a fuelling study, showing that the size and width of the edge current density peak at the low-field side can be explained by the electron density and temperature drives and their respective collisionality modifications.

引用

页数：8

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