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Simulation method for evolution of electron cyclotron current profile in tokamak

A technology of electronic cyclotron and tokamak, which is applied in the direction of electrical digital data processing, design optimization/simulation, special data processing applications, etc., can solve the problem that the simulation results cannot reflect the evolution process of the current profile, and achieve accurate description and numerical stability Strong, computationally efficient effects

Active Publication Date: 2018-11-02
DALIAN UNIV OF TECH
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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the existing method can only adopt the strategy of fixing the driving current profile, which leads to the fact that the simulation results cannot reflect the real evolution process of the current profile

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  • Simulation method for evolution of electron cyclotron current profile in tokamak
  • Simulation method for evolution of electron cyclotron current profile in tokamak
  • Simulation method for evolution of electron cyclotron current profile in tokamak

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Embodiment Construction

[0042] The specific implementation manners of the present invention will be further described below in conjunction with the accompanying drawings and technical solutions.

[0043] The magnetic field of the tokamak device is composed of nested magnetic surfaces, such as the attached figure 1 as shown, Indicates the large ring direction coordinates. In the tokamak discharge experiment, the role of the electron cyclotron wave driving current is mainly to suppress magnetic islands, so magnetic islands usually exist in the initial magnetic field configuration, as shown in the attached figure 2As shown, the magnetic force lines are reconnected into a magnetic island structure, where r is the small radius coordinate, and θ is the polar coordinate. Electron cyclotron waves generally act on the center of the magnetic island. Electron cyclotron wave driving current can undergo self-consistent nonlinear evolution along a given magnetic field configuration, and finally reach a steady...

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Abstract

The invention discloses a simulation method for the evolution of an electron cyclotron current profile in a tokamak. In the process of numerically simulating the evolution of the electron cyclotron wave drive current profile in the tokamak device, a drive current source is firstly described by using a Gaussian function; the evolution of the drive current under a specific magnetic field configuration is calculated according to a convection equation determined by a Fisch-Boozer theory; the magnetic field configuration under the correction of the drive current is calculated; the evolution of thedrive current continues to be calculated under the magnetic field configuration; and the simulation effect of long-term evolution is achieved through repeatedly calculating. The method disclosed by the invention has the beneficial effects that the evolution of the electron cyclotron wave-driven current profile under a real three-dimensional magnetic field configuration is realized; the drive current profile can be obtained at any time; in the meanwhile, the spatial distribution situation of the drive current can be more accurately described through the convection equation determined by the Fisch-Boozer theory; the calculation efficiency is high; the numerical stability is strong; and the method is a stable and efficient numerical simulation method.

Description

technical field [0001] The invention relates to the numerical simulation of the discharge of a tokamak device in the field of magnetic confinement controllable nuclear fusion, and in particular to a three-dimensional simulation method for the nonlinear evolution of the electron cyclotron current profile in the tokamak. Background technique [0002] At present, the whole world is facing a serious problem—the energy crisis. The main energy that people rely on for production and life is fossil energy. However, the reserves of fossil energy are limited, and the burning of fossil energy will also cause problems such as environmental pollution. Scientists believe that nuclear fusion energy is one of the most promising ways to fundamentally solve the energy shortage problem. Among many controllable nuclear fusion schemes, the magnetic confinement method is considered to be the most feasible method at present. Therefore, in order to solve this problem, seven countries including m...

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Application Information

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IPC IPC(8): G06F17/50
CPCG06F30/20
Inventor 王正汹刘桐王佳磊魏来
Owner DALIAN UNIV OF TECH
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