Interacting filamentary eruptions in magnetised plasmas

S. A. Henneberg; S. C. Cowley; H. R. Wilson

doi:10.1088/0741-3335/57/12/125010

Interacting filamentary eruptions in magnetised plasmas

S. A. Henneberg, S. C. Cowley, H. R. Wilson

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4 Scopus citations

Abstract

The interaction between multiple filamentary plasma eruptions is investigated by modelling the non-linear ideal MHD ballooning mode envelope equation with a mixed Eulerian and Lagrangian characterisation of the boundary conditions. The study of multiple plasma filaments is performed in a specific slab equilibrium susceptible to Rayleigh-Taylor instabilities. If the unstable system is initiated with three equal sized filaments, they erupt at the same rate, independently of each other, even in the non-linear regime. However, if one is initiated very slightly larger than the other two it causes a down-draft as it erupts upwards, which suppresses the smaller filaments. This suggests that those filaments which first enter the non-linear regime will dominate the plasma eruption dynamics.

Original language	English
Article number	125010
Journal	Plasma Physics and Controlled Fusion
Volume	57
Issue number	12
DOIs	https://doi.org/10.1088/0741-3335/57/12/125010
State	Published - Nov 3 2015
Externally published	Yes

Funding

This work has been carried out within the framework of the EUROfusion Consortium and has received funding from the Euratom research and training programme 20142018 under grant agreement No 633053 and from the RCUK Energy Programme (grant number EP/I501045).

Funders	Funder number
Horizon 2020 Framework Programme	633053
Engineering and Physical Sciences Research Council	EP/I500987/1, EP/D065399/1

Keywords

ELM
ballooning
eruptions
filamentary
filaments
ideal MHD
non-linear

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10.1088/0741-3335/57/12/125010

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title = "Interacting filamentary eruptions in magnetised plasmas",

abstract = "The interaction between multiple filamentary plasma eruptions is investigated by modelling the non-linear ideal MHD ballooning mode envelope equation with a mixed Eulerian and Lagrangian characterisation of the boundary conditions. The study of multiple plasma filaments is performed in a specific slab equilibrium susceptible to Rayleigh-Taylor instabilities. If the unstable system is initiated with three equal sized filaments, they erupt at the same rate, independently of each other, even in the non-linear regime. However, if one is initiated very slightly larger than the other two it causes a down-draft as it erupts upwards, which suppresses the smaller filaments. This suggests that those filaments which first enter the non-linear regime will dominate the plasma eruption dynamics.",

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AU - Cowley, S. C.

AU - Wilson, H. R.

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N2 - The interaction between multiple filamentary plasma eruptions is investigated by modelling the non-linear ideal MHD ballooning mode envelope equation with a mixed Eulerian and Lagrangian characterisation of the boundary conditions. The study of multiple plasma filaments is performed in a specific slab equilibrium susceptible to Rayleigh-Taylor instabilities. If the unstable system is initiated with three equal sized filaments, they erupt at the same rate, independently of each other, even in the non-linear regime. However, if one is initiated very slightly larger than the other two it causes a down-draft as it erupts upwards, which suppresses the smaller filaments. This suggests that those filaments which first enter the non-linear regime will dominate the plasma eruption dynamics.

AB - The interaction between multiple filamentary plasma eruptions is investigated by modelling the non-linear ideal MHD ballooning mode envelope equation with a mixed Eulerian and Lagrangian characterisation of the boundary conditions. The study of multiple plasma filaments is performed in a specific slab equilibrium susceptible to Rayleigh-Taylor instabilities. If the unstable system is initiated with three equal sized filaments, they erupt at the same rate, independently of each other, even in the non-linear regime. However, if one is initiated very slightly larger than the other two it causes a down-draft as it erupts upwards, which suppresses the smaller filaments. This suggests that those filaments which first enter the non-linear regime will dominate the plasma eruption dynamics.

KW - ELM

KW - ballooning

KW - eruptions

KW - filamentary

KW - filaments

KW - ideal MHD

KW - non-linear

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Interacting filamentary eruptions in magnetised plasmas

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