Collisional gyrokinetic full‐f particle‐in‐cell simulations on open field lines with PICLS

Boesl, M.; Bergmann, Andreas; Bottino, A.; Brunner, S.; Coster, D.; Jenko, F.

doi:10.1002/ctpp.201900117

Cited by 4 publications

(2 citation statements)

References 10 publications

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“…To determine the exact source of these contributions, future work must use a large number of particles while keeping the 3D geometry. In addition, the inclusion of a controllable collision operator would allow for a detailed study of collisions in 3D reconnection (Pezzi 2017;Donnel et al 2019;Boesl et al 2020;Pezzi et al 2021).…”

Section: Discussionmentioning

confidence: 99%

Energy Transport during 3D Small-scale Reconnection Driven by Anisotropic Plasma Turbulence

Rueda

Verscharen

Wicks

et al. 2022

ApJ

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Energy dissipation in collisionless plasmas is a long-standing fundamental physics problem. Although it is well known that magnetic reconnection and turbulence are coupled and transport energy from system-size scales to subproton scales, the details of the energy distribution and energy dissipation channels remain poorly understood. Especially, the energy transfer and transport associated with 3D small-scale reconnection that occurs as a consequence of a turbulent cascade is unknown. We use an explicit fully kinetic particle-in-cell code to simulate 3D small-scale magnetic reconnection events forming in anisotropic and decaying Alfvénic turbulence. We identify a highly dynamic and asymmetric reconnection event that involves two reconnecting flux ropes. We use a two-fluid approach based on the Boltzmann equation to study the spatial energy transfer associated with the reconnection event and compare the power density terms in the two-fluid energy equations with standard energy-based damping, heating, and dissipation proxies. Our findings suggest that the electron bulk flow transports thermal energy density more efficiently than kinetic energy density. Moreover, in our turbulent reconnection event, the energy density transfer is dominated by plasma compression. This is consistent with turbulent current sheets and turbulent reconnection events, but not with laminar reconnection.

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Section: Discussionmentioning

confidence: 99%

Energy Transport during 3D Small-scale Reconnection Driven by Anisotropic Plasma Turbulence

Rueda

Verscharen

Wicks

et al. 2022

ApJ

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“…This type of collision operator has been implemented in various gyrokinetic codes, earliest as a Fourier‐space version in GKV [ 7 ] and later in other codes such as GYSELA [ 8 ] , PICLS [ 9 ] , and COGENT [ 10 ] . Recently another implementation in the code GKEYLL [ 11,12 ] has been published, with a discretization based on a discontinuous Galerkin (DG) scheme.…”

Section: Introductionmentioning

confidence: 99%

Implementation and verification of a conservative,multi‐species,gyro‐averaged, full‐f,Lenard‐Bernstein/Dougherty collision operator in the gyrokinetic codeGENE‐X

Ulbl

Michels

Jenko

2021

Contributions to Plasma Physics

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Gyrokinetic simulations are among the main tools to predict turbulent transport in the core of fusion devices. Unlike the core, the plasma edge and scrape‐off layer are characterized by lower temperature and higher collisionality. To allow for realistic gyrokinetic modelling of edge and scrape‐off layer turbulence, it is crucial to include collisional effects into the simulations. In this work, we present a full‐f, gyro‐averaged, multi‐species, Lenard‐Bernstein/Dougherty (LBD) collision operator, for the use in the gyrokinetic turbulence code GENE‐X. The operator accounts for exact particle density, momentum, and energy conservation, with collision frequencies chosen such that the momentum or temperature relaxation rates of the Boltzmann collision operator are recovered. We provide a conservative second‐order finite‐volume implementation of the operator and present a thorough verification. Due to the excellent conservation properties of the finite‐volume implementation, it is possible to use a coarser velocity space grid, save computational resources and, as a consequence, perform simulations of larger fusion devices.

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Verification of the Fourier-enhanced 3D finite element Poisson solver of the gyrokinetic full-f code PICLS

Stier,

Bottino,

Boesl

et al. 2024

Computer Physics Communications

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Collisional gyrokinetic full‐f particle‐in‐cell simulations on open field lines with PICLS

Cited by 4 publications

References 10 publications

Energy Transport during 3D Small-scale Reconnection Driven by Anisotropic Plasma Turbulence

Energy Transport during 3D Small-scale Reconnection Driven by Anisotropic Plasma Turbulence

Implementation and verification of a conservative,multi‐species,gyro‐averaged, full‐f,Lenard‐Bernstein/Dougherty collision operator in the gyrokinetic codeGENE‐X

Verification of the Fourier-enhanced 3D finite element Poisson solver of the gyrokinetic full-f code PICLS

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