3D non-linear magnetohydrodynamics simulations of a double tearing mode with the JOREK code are presented in the context of trying to better understand the benign termination of runaway electron beams observed in some experiments. It is shown that the non-linear behaviour qualitatively depends on the resistivity η via its effect on how fast secondary, non-linearly destabilized, tearing modes grow relative to the primary mode. Within a certain range of η, a violent and global relaxation is observed, consistent with the 'Kadomtsev-predicted' reconnection region extending from almost the very centre up to the edge of the plasma.
Authors
- Bibliographic Reference
- E Nardon, V Bandaru, M Hoelzl, F J Artola, P Maget. Non-linear dynamics of the double tearing mode. Journal of Plasma Physics, In press. ⟨cea-04193695⟩
- European Project Title
- EUROfusion
- HAL Collection
- ["CEA - Commissariat à l'énergie atomique", 'OpenAIRE', 'IRFM', 'Direction de Recherche Fondamentale', 'CEA Cadarache']
- HAL Identifier
- 4193695
- Institution
- ["Commissariat à l'énergie atomique et aux énergies alternatives", 'Max-Planck-Gesellschaft', 'ITER organization']
- Laboratory
- ['CEA Cadarache', 'Institut de Recherche sur la Fusion par confinement Magnétique', 'Max Planck Institute for Plasma physics']
- Published in
- France
