September 26, 2025

Tearing and secondary instabilities in collisionless plasmas based on gyrofluid modeling

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Gyrofluid modeling shows that non-collisional current sheets may become unstable, leading to plasmoids.
Magnetic reconnection facilitates high reconnection rates, especially when small thickness approaches electron skin depth.
Investigation of marginal stability conditions allows for understanding of plasmoid formation under specific plasma conditions.
Transition from cold to hot-ion regimes is analyzed, revealing secondary instabilities and associated turbulent behavior.

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Hamiltonian gyrofluid analysis reveals plasmoid formation and turbulence in collisionless plasma, highlighting instabilities.

A 2023 study studied this question.

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