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Simulation Method for Neoclassical Tear Modes Controlled by Resonant Magnetic Perturbations in Tokamak

A technology of tokamak and simulation method, which is applied in the numerical simulation of tokamak device discharge and the simulation field of resonant magnetic disturbance control neoclassical tearing mode, which can solve the problems of long cycle, economic loss and expensive cost, and avoid Numerical instability, high computational efficiency, and good numerical stability

Active Publication Date: 2020-08-25
DALIAN UNIV OF TECH
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Problems solved by technology

Because the tokamak device is huge and the physical process of fusion reaction is very complicated, the cost of one experiment is extremely expensive and the cycle is very long. Improper operation of the experiment will damage the device and cause huge economic losses.

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  • Simulation Method for Neoclassical Tear Modes Controlled by Resonant Magnetic Perturbations in Tokamak
  • Simulation Method for Neoclassical Tear Modes Controlled by Resonant Magnetic Perturbations in Tokamak
  • Simulation Method for Neoclassical Tear Modes Controlled by Resonant Magnetic Perturbations in Tokamak

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Embodiment Construction

[0047] The specific implementation manners of the present invention will be further described below in conjunction with the drawings and technical solutions.

[0048] The tokamak device is a device that confines hot plasma in a ring-shaped container to react through a strong magnetic field. Its structure is as follows: figure 1 As shown, the external structure is the external resonant magnetic disturbance coil. First, a three-dimensional coordinate system (r, θ, z) is established according to the real device configuration, where r, θ and z are the radial, polar and axial coordinates respectively, and a three-dimensional calculation grid is constructed, such as figure 2 shown. The initial balanced magnetic surface in a tokamak is a nested circle or a circle with a certain deformation. The neoclassical tearing mode will tear the magnetic surface to form a magnetic island structure, such as image 3shown. Then, according to the data of alternating current passing through the ...

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Abstract

The invention belongs to the numerical simulation of the discharge of a tokamak device in the field of magnetic confinement controlled nuclear fusion, and relates to a simulation method for controlling a new classical tearing mode by resonant magnetic disturbance in a tokamak. According to the current data in the upper coil group of the tokamak, the induced magnetic field is solved by Biot-Savart's law; according to the approximation of the large ring diameter ratio, the expression of the polar flux corresponding to the induced magnetic field is obtained by integration; using Fourier The leaf transform pseudospectral method converts the magnetic flux into components of different moduli, and obtains its three-dimensional distribution in the tokamak configuration, and couples it to the magnetic fluid equation, using the Crank‑Nicolson method to solve the problem in the presence of resonance magnetic disturbance The evolution of the magnetic field with time is used to study its influence on the neoclassical tearing mode. The invention can simulate physical processes such as neoclassical tearing mode locking, suppression and field penetration, has high calculation efficiency and good numerical stability, and is an efficient and accurate numerical method for simulating experiments.

Description

technical field [0001] The invention belongs to the numerical simulation of the discharge of a tokamak device in the field of magnetic confinement controlled nuclear fusion, and in particular relates to a simulation method for controlling a new classical tearing mode by resonant magnetic disturbance in a tokamak. Background technique [0002] In recent decades, due to the massive use of fossil fuels by humans, serious environmental problems have been caused worldwide, such as global warming, smog and light pollution. Especially in developing countries represented by China, these problems are even more serious. The rapid economic development is brought about by sacrificing the environment. Therefore, the development of clean and renewable energy has become an urgent need in China. Scientists believe that nuclear fusion energy is one of the most promising ways to fundamentally solve energy problems. Among them, magnetic confinement nuclear fusion is considered to be the mos...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F30/20
CPCG06F30/20
Inventor 王正汹汤炜康王佳磊刘桐魏来
Owner DALIAN UNIV OF TECH
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