A conceptual model of the magnetic topology and nonlinear dynamics of ELMS

被引：31

作者：

Evans, T. E. ^{[1
]}

Yu, J. H. ^{[2
]}

Jakubowski, M. W. ^{[3
]}

Schmitz, O. ^{[4
]}

Watkins, J. G. ^{[5
]}

Moyer, R. A. ^{[2
]}

机构：

[1] Gen Atom Co, San Diego, CA 92186 USA

[2] Univ Calif San Diego, La Jolla, CA 92093 USA

[3] EURATOM, Max Planck Inst Plasmaphys, Greifswald, Germany

[4] Forschungszentrum Julich, Assoc EURATOM FZJ, Plasmaphys IEF4, D-52425 Julich, Germany

[5] Sandia Natl Labs, Albuquerque, NM 87185 USA

来源：

JOURNAL OF NUCLEAR MATERIALS | 2009年 / 390-91卷

关键词：

D O I：

10.1016/j.jnucmat.2009.01.209

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

A conceptual model is introduced describing the 3D magnetic topology and nonlinear evolution of Type-I edge localized modes (ELMs), which immediately follow the initial linear peeling-ballooning growth phase. The model requires feedback amplification of stable and unstable invariant manifolds that increases the helical perturbation. The amplification process is caused by a rapid growth of field-aligned helical thermoelectric currents that flow through relatively short pedestal plasma flux tubes connecting the inner and outer divertor target plates. It is shown that the model qualitatively agrees with the formation of global field-aligned emission filaments and with fast IR heat flux splitting patterns of the inner and outer strike points observed experimentally. In addition, the model predicts an increase in the size of the ELMs as the pedestal collisionality drops. Experimental data and modeling results are presented supporting the basic conceptual elements of the model. (C) 2009 Elsevier B.V, All rights reserved.

引用

页码：789 / 792

页数：4

共 11 条

[1] Type-I ELM substructure on the divertor target plates in ASDEX Upgrade [J].