Magnetohydrodynamic transport characterization of a field reversed configuration

Onofri, M.; Yushmanov, P. N.; Dettrick, Sean; Barnes, D. C.; Hubbard, Kevin; Tajima, T.

doi:10.1063/1.4994681

Cited by 23 publications

(12 citation statements)

References 35 publications

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“…While there is also ongoing work towards understanding FRC transport with hybrid kinetic/fluid transport codes, namely Q1D [16] and Q2D [17], the present work is the first global nonlinear gyrokinetic transport study of turbulence in the FRC. We expand on the past linear physics simulations mentioned above [13] to push into the nonlinear kinetic simulations required for understanding turbulence-driven transport.…”

Section: Introductionmentioning

confidence: 99%

Cross-separatrix simulations of turbulent transport in the field-reversed configuration

et al. 2019

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Recent local simulations of the field-reversed configuration (FRC) have reported drift-wave stability in the core and instability in the scrape-off layer (SOL). However, experimental measurements indicate the existence of fluctuations in both FRC core and SOL, with much lower amplitude fluctuations measured in the core. With the updated cross-separatrix capabilities of the simulation code used in this paper, nonlinear turbulence simulations find that linear instabilities grow in the SOL, generating fluctuations which spread from SOL to core. After saturation of the linear instabilities, a balance of the inward spread and local damping in the core is achieved. The steady state toroidal wavenumber spectrum shows lower amplitude core fluctuations and larger SOL fluctuations with amplitude decreasing towards shorter wavelengths, which are consistent with experimental measurements.

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Section: Introductionmentioning

confidence: 99%

Cross-separatrix simulations of turbulent transport in the field-reversed configuration

et al. 2019

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“…A similar energy flow trend was observed in a twodimensional resistive magnetohydrodynamics (MHD) simulation. The simulation code, called Lamy Ridge, consists of resistive MHD equations and fluid equations [11,12]. This code has been developed to simulate the collisional merging formation of FRCs.…”

Section: Energy Flow In the Collisional Merging Processmentioning

confidence: 99%

Energy Flow in the Super Alfvénic/Sonic Collisional Merging Process of Field-Reversed Configurations

Kobayashi

Asai

Takahashi

et al. 2021

Plasma and Fusion Research

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“…In this Section, we present the global regular solution for plasma flow from the plasma source at z < 0 with the magnetic field profile similar to one in the C-2U device 3,29 shown in Fig. 6.…”

Section: Effect Of the Finite Ion Temperature On Plasma Flowmentioning

confidence: 99%

“…In plasma propulsion, magnetic nozzle configuration is employed to convert the plasma thermal energy into the ion kinetic energy, thus generating thrust 1,2 . In open mirror fusion devices, the expanding magnetic field of the divertor (expander region) is used to spread the energy over the larger area to reduce the wall heat loads 3 . Plasma flow in the edge region of the divertor tokamak also experiences acceleration to supersonic velocities due to the combined effects of plasma pressure and inhomogeneous magnetic field [4][5][6] .…”

Section: Introductionmentioning

confidence: 99%

“…in the whole range from sub-sonic, V < c s , to super-sonic, V > c s , velocities. In this paper we study the role of finite ion temperature and dissipation due to ionization and charge-exchange on plasma flow and acceleration in the context of the magnetic fusion experiments 3,15 . These results are also of interest for propulsion devices where a large ion temperature is expected, such as in VASIMR 2 .…”

Section: Introductionmentioning

confidence: 99%

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Ion Temperature Effects on Plasma Flow in the Magnetic Mirror Configuration

Sabo,

Smolyakov,

Yushmanov

et al. 2021

Preprint

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Effects of finite ion temperature on plasma flow in the converging-diverging magnetic field, the magnetic mirror, or equivalently, magnetic nozzle configuration, are studied using a quasineutral paraxial two-fluid MHD model with isothermal electrons and magnetized ions. The magnetized ions are considered in the two-pressure approximation with Chow-Golberger-Law model and its generalization. The solutions of stationary MHD equations were studied with an emphasis on the role of the singularity at the sonic point transition. It is shown that the regularity of the sonic point defines a global solution describing plasma acceleration from subsonic to supersonic velocity. Such stationary solutions were compared with the time dependent dynamics confirming that the solutions of the time-dependent equations converge to the stationary solutions. It is shown that the perpendicular ion pressure enhances plasma acceleration due to the mirror force. The role of ion dissipative effects such as ionization and charge exchange on plasma flow acceleration have been investigated.

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Magnetohydrodynamic transport characterization of a field reversed configuration

Cited by 23 publications

References 35 publications

Cross-separatrix simulations of turbulent transport in the field-reversed configuration

Cross-separatrix simulations of turbulent transport in the field-reversed configuration

Energy Flow in the Super Alfvénic/Sonic Collisional Merging Process of Field-Reversed Configurations

Ion Temperature Effects on Plasma Flow in the Magnetic Mirror Configuration

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