SOL-KiT—Fully implicit code for kinetic simulation of parallel electron transport in the tokamak Scrape-Off Layer

Mijin, Stefan; Antony, A.; Militello, F.; Kingham, R. J.

doi:10.1016/j.cpc.2020.107600

Cited by 11 publications

(23 citation statements)

References 40 publications

(95 reference statements)

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“…As such, an important feature of SOL-KiT is that it can recover the classical transport coefficients in highly collisional plasmas, including the Spitzer-Härm heat flow, while demonstrating non-local effects in low-collisionality domains. This has been shown in [6,7]. The implicit numerical scheme used by SOL-KiT also ensures that fast phenomena on the timescale of the plasma oscillation period are effectively smoothed out when using comparatively large timesteps.…”

Section: Sol-kitmentioning

confidence: 85%

“…SOL-KiT is a fully implicit 1D plasma code [6] which has been used to study kinetic effects in parallel electron transport in the divertor SOL [7]. We will briefly outline the physical model implemented in SOL-KiT, followed by the extensions to the ion model which have facilitated the analysis presented here.…”

Section: Physical Modelmentioning

confidence: 99%

“…Here, we will briefly outline the SOL-KiT code; the interested reader is referred to [6] for a more detailed explanation of the model, numerics and benchmarking.…”

Section: Sol-kitmentioning

confidence: 99%

“…is the total ionization cross section, so that S ion = b K ion b n b . Excitation/deexcitation collisions are treated similarly, which contributes to the particle source S b for the individual neutral states in (6). This same approach is taken when the fluid model for electrons is used, and f 0 is taken to be Maxwellian at the correct density and temperature.…”

Section: Kinetic Electron Modelmentioning

confidence: 99%

“…Here, results are presented of 1D simulations of the divertor SOL using the kinetic electron code SOL-KiT [6], which is outlined in Sect. 2.1.…”

Section: Introductionmentioning

confidence: 99%

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Ion–electron energy transfer in kinetic and fluid modelling of the tokamak scrape-off layer

et al. 2021

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Using the 1D kinetic electron code SOL-KiT, simulations of the divertor tokamak scrape-off layer were carried out to explore the presence of kinetic effects in energy transfer between the ions and electrons. During steady-state conditions, it was found that the ion–electron energy transfer is well described by a fluid model, with only minimal differences seen when electrons are treated kinetically. During transient regimes (featuring a burst of energy into the scrape-off layer), we see evidence of enhanced energy exchange when calculated kinetically as compared to a fluid model. The kinetic correction represents an additional 8–55% ion–electron energy transfer across the domain, depending on the pre-transient plasma collisionality. Compared to the total energy going into the plasma during the transient, the correction is less than 1%, so its impact on plasma profiles may be small. The effect is seen to increase in strength along the domain, peaking in front of the divertor target. The overall discrepancy (integrated along the domain) increases during the transient energy burst and disappears on a similar timescale. However, at the target the effect peaks later and takes several multiples of the transient duration to relax. This effect may be only partially explained by an additional population of cold electrons arising from neutral ionization.

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Section: Sol-kitmentioning

confidence: 85%

Section: Physical Modelmentioning

confidence: 99%

“…Here, we will briefly outline the SOL-KiT code; the interested reader is referred to [6] for a more detailed explanation of the model, numerics and benchmarking.…”

Section: Sol-kitmentioning

confidence: 99%

Section: Kinetic Electron Modelmentioning

confidence: 99%

“…Here, results are presented of 1D simulations of the divertor SOL using the kinetic electron code SOL-KiT [6], which is outlined in Sect. 2.1.…”

Section: Introductionmentioning

confidence: 99%

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Ion–electron energy transfer in kinetic and fluid modelling of the tokamak scrape-off layer

et al. 2021

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Ion temperature anisotropy model with cross‐field drifts in the scrape‐off layer

Zhao

Rognlien

Järvinen

et al. 2022

Contributions to Plasma Physics

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An ion temperature anisotropy model including cross‐field drifts has been implemented in the 2D transport code UEDGE. Two ion temperature equations are solved in the model to give separate ion temperatures perpendicular and parallel to the magnetic field, which results in an additional mirror force for ion parallel transport and also leads to an additional curvature drift in the perpendicular direction. In our previous work, an ion temperature anisotropy model was implemented and applied to the full 2D version of UEDGE including recycled neutrals. The simulation results showed that the mirror force due to anisotropy reduces ion parallel flow velocity, however, the simulations were presented without cross‐field electric and magnetic drifts. Nevertheless, in present medium‐size tokamaks or future compact fusion devices, cross‐fields are important. In this work, the anisotropy model is extended to be compatible with the inclusion of cross‐field drifts. Preliminary results on comparison between the model solutions with and without cross‐field drifts are presented.

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Vlasov-Fokker-Planck-Maxwell simulations for plasmas in inertial confinement fusion

Zhang,

Li,

Liu

et al. 2024

Computer Physics Communications

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SOL-KiT—Fully implicit code for kinetic simulation of parallel electron transport in the tokamak Scrape-Off Layer

Cited by 11 publications

References 40 publications

Ion–electron energy transfer in kinetic and fluid modelling of the tokamak scrape-off layer

Ion–electron energy transfer in kinetic and fluid modelling of the tokamak scrape-off layer

Ion temperature anisotropy model with cross‐field drifts in the scrape‐off layer

Vlasov-Fokker-Planck-Maxwell simulations for plasmas in inertial confinement fusion

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