Numerical Study of Supersonic Molecular Beam Injection System in Thailand Tokamak I

Promping, Jiraporn; Wisitsorasak, Apiwat; Chatthong, Boonyarit; Nilgumhang, Kewalee

doi:10.1585/pfr.15.2403033

Cited by 3 publications

(3 citation statements)

References 20 publications

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“…However, the electron temperature appears only slightly change due to the injection. The simulation results shown here are also consistent with a reduced model that based on a 1D fluid simulation [19], and the SMBI experiments in other tokamaks [17].…”

Section: The Smbi Simulations With Varying Injection Speedssupporting

confidence: 86%

“…Thus three-dimension simulation is thus used in this work. It allows us to investigate the plasma and neutral gas dynamics in more detail, as compared to 1D simulation which usually takes poloidally and toroidally averaging [19]. As the fuel is delivered to the tokamak plasma, the fuel molecules immediately increase near the edge by the convection.…”

Section: Discussionmentioning

confidence: 99%

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Preliminary study of supersonic molecular beam injection in Thailand Tokamak-1 using 3D fluid model

Rongpuit

Wisitsorasak

Promping³

2023

J. Phys.: Conf. Ser.

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Successful operation of a tokamak relies on effective and appropriate methods of plasma fueling. The development plan of Thailand Tokamak-1 (TT-1) will employ the supersonic molecular beam injection (SMBI) which delivers the fueling gas more effectively and deeper than the gas puffing method. In this work, we study the effect of SMBI on the plasma transport of TT-1 plasma by using 3D fluid simulation. The model includes the continuity equation, energy balance equation, momentum equation, continuity of fuel equation, and momentum of fuel. BOUT++ is then used to solve these equations by a finite difference method with the field-aligned coordinates in the edge region. The simulation shows that when hydrogen fuel gas is by the SMBI method from the low-field side into the plasma with a speed of 1000 m/s, the electron density in the edge locally rises as a result of the dissociation and ionization. The ion and electron temperatures then drop. After that, the density spread over the whole plasma volume within about 10 ms. When the injection speed increases, it results in a deeper penetration length of the fuel deposition.

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Section: The Smbi Simulations With Varying Injection Speedssupporting

confidence: 86%

Section: Discussionmentioning

confidence: 99%

Preliminary study of supersonic molecular beam injection in Thailand Tokamak-1 using 3D fluid model

Rongpuit

Wisitsorasak

Promping³

2023

J. Phys.: Conf. Ser.

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“…Several codes, such as B2-EIRENE [11], EPIC [12], UEDGE [13,14], and TPSMBI [15], have been developed based on the classical fluid model of SMBI and are able to simulate transport in a toroidal geometry. For studying the SMBI in TT-1, a simple one-dimension fluid model was developed [16]. The model includes transport equations of three particle species (plasma, atom and molecules of fuel gas) such as plasma, heat and momentum transport equations, molecule density and radial momentum transport equations, and atom density transport equation.…”

Section: Introductionmentioning

confidence: 99%

Computational Study of the Supersonic Molecular Beam Injection in Thailand Tokamak-1 based on the 2D Fluid Model

RONGPUIT,

WISITSORASAK,

PROMPING

2024

Plasma and Fusion Research

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The successful operation of a tokamak requires effective and appropriate methods of plasma fueling. In the development plan for Thailand Tokamak-1 (TT-1), the use of supersonic molecular beam injection (SMBI) has been proposed as a method that can more effectively and deeply deliver fueling gas compared to the gas puffing method. In this study, we used 2D fluid simulation to investigate the impact of SMBI on plasma transport in TT-1. Our model incorporated the continuity equations, energy balance equations, momentum equation, continuity of fuel equations, and momentum equation of fuel. BOUT++ is then used to solve these equations by a finite difference method with the field-aligned coordinates in the edge region of the tokamak. Our simulation results showed that when hydrogen fuel gas is injected into the plasma via SMBI from the low-field side at the speed in the range of 600 -1200 m/s, the electron density in the edge region locally increases due to dissociation and ionization in the region where the fuel gas meets the plasma. This subsequently leads to a decrease in the ion and electron temperatures. The increased density then spreads throughout the plasma volume within approximately 10 ms. Increasing the injection speed leads to a deeper penetration length for the fuel deposition. c

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Fast-ion orbit analysis in Thailand Tokamak-1

Paenthong

Wisitsorasak

Sangaroon

et al. 2022

Fusion Engineering and Design

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Numerical Study of Supersonic Molecular Beam Injection System in Thailand Tokamak I

Cited by 3 publications

References 20 publications

Preliminary study of supersonic molecular beam injection in Thailand Tokamak-1 using 3D fluid model

Preliminary study of supersonic molecular beam injection in Thailand Tokamak-1 using 3D fluid model

Computational Study of the Supersonic Molecular Beam Injection in Thailand Tokamak-1 based on the 2D Fluid Model

Fast-ion orbit analysis in Thailand Tokamak-1

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