Magnetic island evolution under the action of electron cyclotron current drive

D. Borgogno, L. Comisso, D. Grasso, E. Lazzaro

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Abstract

The magnetic island evolution under the action of an externally current generated by electron cyclotron (ECCD) wave beams is studied using a reduced resistive magnetohydrodynamics (RRMHD) plasma model. We found interesting and somewhat unexpected features of the actual nonlinear 2-D evolution of the magnetic perturbation depending on the injection time of the radio frequency control. In particular in the linear phase of the magnetic island growth we observe that the complete annihilation of the island width is followed by a spatial phase shift of the island, referred as «flip»instability. On the other hand, a current drive deposition in the Rutherford regime can be accompained by the occurrence of a Kelvin-Helmholtz type shear flow instability, responsible for the onset of a plasma turbulent behavior. © 2013 Published under licence by IOP Publishing Ltd.
Original languageEnglish
DOIs
Publication statusPublished - 2012
Externally publishedYes
Event13th Joint Varenna-Lausanne International Workshop on Theory of Fusion Plasmas - , Italy
Duration: 1 Jan 2012 → …

Conference

Conference13th Joint Varenna-Lausanne International Workshop on Theory of Fusion Plasmas
CountryItaly
Period1/1/12 → …

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All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

Cite this

Borgogno, D., Comisso, L., Grasso, D., & Lazzaro, E. (2012). Magnetic island evolution under the action of electron cyclotron current drive. Paper presented at 13th Joint Varenna-Lausanne International Workshop on Theory of Fusion Plasmas, Italy. https://doi.org/10.1088/1742-6596/401/1/012002