Progress in the peeling-ballooning model of edge localized modes: Numerical studies of nonlinear dynamics

P. B. Snyder, H. R. Wilson, X. Q. Xu

Research output: Contribution to journalArticlepeer-review

142 Scopus citations

Abstract

Nonlinear three-dimensional electromagnetic simulations are employed to study the dynamics of edge localized modes (ELMs) driven by intermediate wavelength peeling-ballooning modes. It is found that the early behavior of the modes is similar to expectations from linear, ideal peeling-ballooning mode theory, with the modes growing linearly at a fraction of the Alfv́n frequency. In the nonlinear phase, the modes grow explosively, forming a number of extended filaments which propagate rapidly from the outer closed flux region into the open flux region toward the outboard wall. Similarities to nonlinear ballooning theory as well as additional complexities are observed. Comparison to observations reveals a number of similarities. Implications of the simulations and proposals for the dynamics of the full ELM crash are discussed.

Original languageEnglish
Article number056115
Pages (from-to)1-7
Number of pages7
JournalPhysics of Plasmas
Volume12
Issue number5
DOIs
StatePublished - May 2005
Externally publishedYes

Funding

This is a report of work supported by the U.S. Department of Energy under Contract No. DE-FG03-95ER54309 at General Atomics and Contract No. W-7405-ENG-48 at University of California Lawrence Livermore National Laboratory, and supported in part by the United Kingdom Engineering and Physical Sciences Research Council and EURATOM.

FundersFunder number
U.S. Department of EnergyDE-FG03-95ER54309, W-7405-ENG-48
H2020 Euratom
Engineering and Physical Sciences Research Council

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