The design of Multiple Plasma Simulation Linear Device

Sun, Changjiang; Sang, Chaofeng; Ye, Hao; Wang, Qi; Líu, Hao; Wang, Zhanhui; Wang, Huajie; Ke, Rui; Wang, Yue; Zhang, Yanjie; Wang, Dezhen

doi:10.1016/j.fusengdes.2020.112074

Cited by 11 publications

(8 citation statements)

References 39 publications

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“…In the MPS-LD device, the auxiliary heating for both ions and electrons is planned, and the 'Downhill' magnetic configuration, which means that the maximum axial field should be located at the upstream location, while the waveguides and window for electron Bernstein wave should be located at the lower magnetic field location, is proposed for the electron heating [3,31]. Therefore, the magnetic configuration for auxiliary heating is constructed to clarify the influence of 'Downhill' magnetic configuration on ion heating, and to predict the compatibility of electron and ion heating simultaneously.…”

Section: The Optimization Of Icrhmentioning

confidence: 99%

Simulation of ion cyclotron resonance heating by using particle-in-cell method in MPS-LD linear plasma device

Sun¹,

Sang²,

Wang³

et al. 2023

Plasma Phys. Control. Fusion

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The auxiliary heating of electrons and ions in linear plasma devices is necessary to achieve the boundary plasma relevant environment of tokamak, so that to investigate the boundary physics and plasma-material interactions. In this work, the simulation of ion cyclotron resonance heating (ICRH) in the linear plasma device MPS-LD is carried out by using a 3D particle-in-cell method, and the wave-ion interaction mechanism based on “beach-heating” technique in the ion heating region is investigated. A left-handed, circularly polarized wave along the magnetic field lines is used to represent the electromagnetic wave in the model, after the analysis of the cold plasma dispersion relation. The mechanism of ion heating by collisionless damping absorption is demonstrated and explained by using plasma current as the plasma response. The dependencies of the heating efficiency on the plasma density, magnetic field strength and magnetic field configuration are studied. The correlation between plasma density and magnetic field strength, which satisfies the heating efficiency, is found and it is in perfect agreement with the theoretical derivation. Finally, by using the designed parameters of MPS-LD provided by SOLPS-ITER, the prediction of ICRH is performed. The simulation result shows the ion temperature can be heated higher than 40 eV and it satisfies the requirement for SOL/divertor simulation experimentally in MPS-LD.

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Section: The Optimization Of Icrhmentioning

confidence: 99%

Simulation of ion cyclotron resonance heating by using particle-in-cell method in MPS-LD linear plasma device

Sun¹,

Sang²,

Wang³

et al. 2023

Plasma Phys. Control. Fusion

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“…The MPS-LD will be equipped with a helicon plasma source , and the diameter of the plasma beam in the first stage will be no larger than 0.14 m. This will be a steady-state discharge, and the typical discharge duration will be several hours. More details about the device can be found in [6]. The objective of the MPS-LD is to simulate plasma transport in the scrape-off layer (SOL)/divertor region and to investigate the main PMIs in the tokamak.…”

Section: Simulation Modelmentioning

confidence: 99%

“…LPD-MCC can be verified by benchmarking against the COMSOL calculation. By using the location and current of each coil in MPS-LD, see table 2 in [6], the magnetic fields calculated by LPD-MCC and COM-SOL can be compared, as shown in figure 2. It can be seen that a relative uniform magnetic field is obtained and the simulation results of the two codes are exactly the same.…”

Section: Magnetic Field Calculation and Simulation Mesh Creation For ...mentioning

confidence: 99%

“…Plasma-material interaction (PMI) is one of the most critical issues for the long-pulse steady-state operation of future boundary plasma [4,5]. Therefore, we designed the Multiple Plasma Simulation Linear Device (MPS-LD) [6] at Dalian University of Technology, with the aim of investigating PMI and edge plasma transport behaviors. The construction of the MPS-LD is underway.…”

Section: Introductionmentioning

confidence: 99%

“…In the previous design work of the MPS-LD, only the hardware, such as the magnet system, vacuum system, plasma source, cooling system, and target room, was designed [6]. However, the full simulation of plasma transport has not been carried out yet.…”

Section: Introductionmentioning

confidence: 99%

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Simulation of plasma transport in MPS-LD linear plasma device by using BOUT++

Wang¹,

Sang²,

Li³

et al. 2022

Plasma Phys. Control. Fusion

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A linear plasma device (LPD) module based on the 2D transport module under the BOUT++ framework is developed in this paper to simulate the plasma transport in the LPD. The LPD module includes three parts, i.e. magnetic field calculation, simulation mesh generation and plasma transport setup. Magnetic field is calculated by circular current loop using the location and current information of each coil. The mesh generation code can produce the simulation mesh for LPD employing the magnetic field. The plasma transport model is based on the reduced Braginskii equations, which consist of the continuity equation, momentum equation, and energy equation. The fluid neutral model is applied for the neutral particle simulation. Deuterium (D) and helium (He) ions and atoms can be simulated by the model. The first attempt to simulate the plasma transport in the new LPD called MPS-LD is presented using the developed model. The D plasma transport in the MPS-LD is simulated and benchmarked against the two-point model, showing the validation of the BOUT++ simulation. The effects of radial transport on the heat load to the target are studied, which illustrates significant impact of the radial diffusivities D_⊥ and χ_(⊥i,e)^c on the plasma. Moreover, the He impurity injection process during the discharge is studied with the emphasis on the plasma-impurity interactions. The simulation results show the He injection can reduce the plasma energy load to the target significantly, and the efficiency depends on the He source density and injection velocity. The present work provides an alternative and flexible simulation tool for the plasma transport in the LPD.

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Simulation of the impact of particle recycling on the plasma in MPS‐LD device based on the BOUT++ LPD module

Wang,

Sun,

Sang

et al. 2024

Contrib. Plasma Phys

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A linear plasma device (LPD) module has been developed under the BOUT++ framework to simulate plasma transport in the MPS‐LD. However, previously, the LPD module used a simplistic neutral particle model that only includes particle density and velocity, which prevents the full understanding of the plasma‐neutrals interactions. In this work, we further optimize the neutral model by using a more complete neutral fluid model containing the continuity equation, momentum equation, and energy equation. The reactions such as charge exchange, excitation, and radiation collisions are included. Since the neutral particle source is mainly provided by particle recycling from the target, a particle recycling model is employed, which includes both fast reflection and slow thermal release. The upgraded LPD module is applied to simulate the argon (Ar) discharge experiment of MPS‐LD, and the benchmark against experiment measurement and SOLPS‐ITER simulation results are presented. Good agreements are obtained, showing the validation of the upgraded module. After that, the impact of particle recycling on Ar plasma is investigated. It is found that a higher recycling coefficient (R) promotes the achievement of high‐density plasma at the target. The recycled Ar atoms change target plasma pressure as well as plasma‐neutral collisions, which both contribute to plasma momentum loss, thus promoting the rollover of ion flux to the target.

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The design of Multiple Plasma Simulation Linear Device

Cited by 11 publications

References 39 publications

Simulation of ion cyclotron resonance heating by using particle-in-cell method in MPS-LD linear plasma device

Simulation of ion cyclotron resonance heating by using particle-in-cell method in MPS-LD linear plasma device

Simulation of plasma transport in MPS-LD linear plasma device by using BOUT++

Simulation of the impact of particle recycling on the plasma in MPS‐LD device based on the BOUT++ LPD module

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