Plasmoid-mediated reconnection during nonlinear peeling-ballooning edge-localized modes
Fuente:
arXiv
Saved in:
| Main Author: | |
|---|---|
| Format: | Preprint |
| Published: |
2021
|
| Subjects: | |
| Online Access: | |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866914667231707136 |
|---|---|
| author | Ebrahimi, Fatima |
| author_facet | Ebrahimi, Fatima |
| contents | Plasmoid-mediated reconnection is investigated for nonlinear Peeling-Ballooning Edge-Localized Modes (P-B ELMs). The formation of current sheets and the transition to 3-D current sheet instability is demonstrated through fully nonlinear resistive MHD simulations of P-B ELMs in DIII- D discharges. Large-scale axisymmetric current sheets, as well as small-scale poloidally extending current sheets, are formed as the coherent P-B ELM filaments nonlinearly evolve. It is observed that, at high Lundquist numbers, these current sheets break during a reconnection burst, i.e. a secondary exponential growth of intermediate modes followed by relaxation due to the suppression of P-B drive. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2110_09706 |
| institution | arXiv |
| publishDate | 2021 |
| record_format | arxiv |
| spellingShingle | Plasmoid-mediated reconnection during nonlinear peeling-ballooning edge-localized modes Ebrahimi, Fatima Plasma Physics Plasmoid-mediated reconnection is investigated for nonlinear Peeling-Ballooning Edge-Localized Modes (P-B ELMs). The formation of current sheets and the transition to 3-D current sheet instability is demonstrated through fully nonlinear resistive MHD simulations of P-B ELMs in DIII- D discharges. Large-scale axisymmetric current sheets, as well as small-scale poloidally extending current sheets, are formed as the coherent P-B ELM filaments nonlinearly evolve. It is observed that, at high Lundquist numbers, these current sheets break during a reconnection burst, i.e. a secondary exponential growth of intermediate modes followed by relaxation due to the suppression of P-B drive. |
| title | Plasmoid-mediated reconnection during nonlinear peeling-ballooning edge-localized modes |
| topic | Plasma Physics |
| url | https://arxiv.org/abs/2110.09706 |