Plasmoid-mediated reconnection during nonlinear peeling–ballooning edge-localized modes

Ebrahimi, Fatima; Bhattacharjee, Amitava

doi:10.1088/1741-4326/ad0062

Title: Plasmoid-mediated reconnection during nonlinear peeling–ballooning edge-localized modes

Journal Article · 24 October 2023 · Nuclear Fusion

DOI: https://doi.org/10.1088/1741-4326/ad0062 · OSTI ID:2203575

Ebrahimi, Fatima; Bhattacharjee, Amitava

Abstract Plasmoid-mediated reconnection is investigated for nonlinear peeling–ballooning edge-localized modes (P-B ELMs). The formation of current sheets and the transition to 3D 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 extended 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.

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Sponsoring Organization:: USDOE Office of Science (SC), Fusion Energy Sciences (FES)

Grant/Contract Number:: SC0010565

OSTI ID:: 2203575

Alternate ID(s):: OSTI ID: 2007676; OSTI ID: 2217299

Journal Information:: Nuclear Fusion, Journal Name: Nuclear Fusion Journal Issue: 12 Vol. 63; ISSN 0029-5515

Publisher:: IOP PublishingCopyright Statement

Country of Publication:: IAEA

Language:: English

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