Plasma current profile distribution reconstruction method and system based on high-precision magnetic field tilt angle

Abstract

The application provides a plasma current profile distribution reconstruction method and system based on high-precision magnetic field tilt angle, the method comprising: injecting neutral beams in the direction of the specified point of the plasma core; receiving polarized light beams transmitted from the plasma in different polarization directions using multiple polarizers with different polarization directions; measuring the intensity of the polarized light transmitted through the polarizer, calculating the tilt angle of the magnetic field of the specified point of the plasma core based on the intensity ratio of the polarized light corresponding to each polarizer; collecting magnetic measurement input data; and performing plasma core current profile distribution inversion based on the tilt angle of the magnetic field of the specified point of the plasma core and the magnetic measurement input data. The system comprises a high-precision magnetic field tilt angle measurement system, a data acquisition system and a plasma shape inversion system. The application accurately measures the tilt angle of the magnetic field of the plasma core, provides more accurate data support for the reconstruction of the plasma current profile distribution, optimizes feedback control, and improves the stability and confinement efficiency of the plasma.

Description

Technical Field

[0001] This invention relates to the field of magnetic confinement plasma nuclear fusion technology, and more specifically, to a method and system for reconstructing plasma current profile distribution based on high-precision magnetic field tilt angle. Background Technology

[0002] Currently, in magnetically confined plasma fusion, the tokamak serves as the primary confinement device, where plasma current density significantly influences plasma transport and macroscopic magnetohydrodynamic instability. High-performance tokamak plasma discharge is achieved by measuring and feedback-controlling the plasma current density. However, the core temperature in a tokamak device reaches tens of millions, even hundreds of millions of degrees Celsius, posing a challenge to core plasma current density measurement. Currently, both domestically and internationally, external measurement methods combined with equilibrium inversion algorithms are commonly used to estimate the core plasma current density. Due to the lack of core measurement as a constraint, previously estimated core plasma currents are often inaccurate and difficult to use for feedback control of the plasma current.

[0003] To accurately calculate the plasma current density, it is necessary to simultaneously measure the magnetic field information both inside and outside the plasma boundary, that is, to measure as much magnetic field information as possible throughout space. Then, combined with a balance inversion algorithm, the accurate plasma current density can be calculated. Research has found that the tilt angle γ of the plasma core magnetic field can be derived from the linearly polarized light in the corresponding Stark beam. Therefore, effectively measuring the tilt angle γ of the core magnetic field and developing an effective optimization algorithm, and incorporating this tilt angle γ as a constraint into the balance inversion algorithm, are key to achieving precise plasma control. Summary of the Invention

[0004] The present invention aims to solve at least one of the aforementioned technical problems existing in the prior art.

[0005] To this end, the first aspect of the present invention provides a method for reconstructing plasma current profile distribution based on high-precision magnetic field tilt angle.

[0006] A second aspect of the present invention provides a plasma current profile distribution reconstruction system based on a high-precision magnetic field tilt angle.

[0007] This invention provides a method for reconstructing plasma current profile distribution based on high-precision magnetic field tilt angle, comprising: A neutral beam is injected toward a designated point in the plasma core; Multiple polarizers with different polarization directions are used to receive polarized beams transmitted from the plasma direction; The intensity of polarized light transmitted through the polarizer is measured, and the tilt angle of the magnetic field at a specified point in the plasma core is calculated based on the intensity ratio of the polarized light corresponding to each polarizer. Collect magnetic measurement input data, which includes the central solenoid coil current, the poloidal field coil current, the magnetic probe, and the magnetic flux loop value; Based on the tilt angle of the magnetic field at a specified point in the plasma core and the magnetic measurement input data, the current profile distribution of the plasma core is inverted.

[0008] The plasma current profile distribution reconstruction method based on high-precision magnetic field tilt angle according to the above-described technical solution of the present invention may also have the following additional technical features: In the above technical solution, the designated point of the plasma core is located on a designated cross-section of the plasma core, and on the designated cross-section of the plasma core, the magnetic field of the designated point in the horizontal direction is approximated as 0.

[0009] In the above technical solution, the number of polarizers is four, and the polarization direction angles of the four polarizers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 10, 11, 19 ... , and .

[0010] In the above technical solution, the calculation of the tilt angle of the magnetic field at a specified point in the plasma core based on the intensity ratio of the polarized light corresponding to each polarizer includes:

[0011] in, Indicates the tilt angle of the magnetic field at a specified point in the core of the plasma; Indicates wavelength; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer.

[0012] In the above technical solution, the step of performing plasma core current profile distribution inversion based on the tilt angle of the magnetic field at a specified point in the plasma core and magnetic measurement input data includes: Based on the magnetic measurement input data, the Grad-Shafranov equilibrium equations are solved to obtain the initial equilibrium configuration; The formula for the circumferential magnetic field at the specified point of the plasma core is obtained based on the tilt angle of the magnetic field at the specified point of the plasma core. The poloidal coil current component, plasma current component, and eddy current component in the circumferential magnetic field at the specified point are calculated according to the formula. The magnetic flux distribution of the initial equilibrium configuration is used as the initial magnetic flux of the Grad-Shafranov equilibrium equation. The poloidal coil current component, plasma current component, and eddy current component in the circumferential magnetic field at a specified point are substituted into the response equation of the Grad-Shafranov equilibrium equation to obtain the plasma core current profile distribution.

[0013] In the above technical solution, the formula for the circumferential magnetic field at a designated point in the plasma core is:

[0014] in, , , All parameters are known parameters of the diagnostic signals at specified points in the plasma core; This indicates the circumferential magnetic field at a specified point in the plasma core; This indicates the magnetic field perpendicular to a specified point in the plasma core.

[0015] This invention provides a plasma current profile distribution reconstruction system based on a high-precision magnetic field tilt angle, applicable to the plasma current profile distribution reconstruction method based on a high-precision magnetic field tilt angle as described in any of the above technical solutions; the system includes: A high-precision magnetic field tilt angle measurement system is used to measure the tilt angle of the magnetic field at a specified point in the plasma core. The data acquisition system is used to collect magnetic measurement input data; The plasma configuration inversion system is connected in communication with a high-precision magnetic field tilt angle measurement system and a data acquisition system. It is used to perform plasma core current profile distribution inversion based on the tilt angle of the magnetic field at a specified point in the plasma core and magnetic measurement input data.

[0016] In the above technical solution, the high-precision magnetic field tilt angle measurement system includes: Neutral beam injection unit, used to inject a neutral beam toward a designated point in the plasma core; A polarizer unit includes several polarizers disposed on the propagation path of a neutral beam emission beam, wherein the neutral beam emission beam is a Stark-polarized beam emitted after the neutral beam interacts with the plasma. The optical lens unit includes optical collimating lenses that correspond one-to-one with the positions of several polarizers; The spectrometer, connected to the optical lens unit via an optical fiber, is used to measure the intensity of polarized light transmitted through the polarizer.

[0017] In the above technical solution, there are four polarizers arranged in a matrix, and the polarization direction angles of the four polarizers are 0°, 0°, 0°, and 0° respectively. , and .

[0018] In the above technical solution, the data acquired by the data acquisition system is shared with the plasma configuration inversion system via shared memory. The plasma configuration inversion system is equipped with a reflective memory card for data interaction with the high-precision magnetic field tilt angle measurement system. That is, the tilt angle of the magnetic field at a specified point in the plasma core obtained by the high-precision magnetic field tilt angle measurement system is shared with the plasma configuration inversion system through the reflective memory.

[0019] In summary, due to the adoption of the above-mentioned technical features, the beneficial effects of the present invention are: This invention patent provides a method and system for reconstructing plasma current profile distribution based on a high-precision magnetic field tilt angle. The method involves injecting a neutral beam into a designated point in the plasma core and using multiple polarizers with different polarization directions to receive the polarized beam transmitted from the plasma direction. The intensity of the polarized light transmitted through the polarizers is measured, and the tilt angle of the magnetic field at the designated point in the plasma core is calculated based on the intensity ratio of the polarized light corresponding to each polarizer. This method can more accurately measure the tilt angle of the magnetic field in the plasma core, providing more precise data support for the reconstruction of the plasma current profile distribution, thereby enhancing plasma control, optimizing feedback control, and improving plasma stability and confinement efficiency.

[0020] Furthermore, this method considers not only the magnetic field information inside the plasma but also the magnetic field information outside the boundary, realizing the measurement and utilization of magnetic field-related information throughout space and improving the accuracy of plasma current density estimation. Addressing the measurement challenges posed by the high-temperature environment of the plasma core in tokamak devices, this invention provides an effective measurement method capable of accurately measuring plasma current density under high-temperature conditions, solving the high-temperature measurement problem. This invention develops an effective optimization algorithm and incorporates the core magnetic field tilt angle as a constraint into the equilibrium inversion algorithm, improving the algorithm's efficiency and accuracy. By improving the accuracy of plasma current density measurement, this invention contributes to advancing research in magnetic confinement fusion and provides technical support for the commercial application of nuclear fusion energy. Simultaneously, by precisely controlling the plasma current profile distribution, this invention helps reduce operational risks during tokamak device operation, improves device safety and reliability, enhances device performance, and increases plasma confinement time and energy conversion efficiency. The implementation of this invention will drive the development of related measurement technologies and control algorithms, providing new technical means and research directions for the field of magnetic confinement fusion, and promoting the development and application of nuclear fusion technology.

[0021] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0022] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a flowchart of a plasma current profile distribution reconstruction method based on high-precision magnetic field tilt angle according to an embodiment of the present invention; Figure 2 This is a schematic diagram of the operation of a plasma current profile distribution reconstruction system based on a high-precision magnetic field tilt angle according to an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a high-precision magnetic field tilt angle measurement system in one embodiment of the present invention.

[0023] in, Figures 1 to 3 The correspondence between the reference numerals and component names in the attached drawings is as follows: 1. Plasma; 2. Neutral beam injection unit; 3. Neutral beam emission beam; 4. Polarizer; 5. Optical collimating lens; 6. Optical fiber; 7. Spectrometer. Detailed Implementation

[0024] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0025] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0026] The following reference Figures 1 to 3 This invention describes a method and system for reconstructing plasma current profile distribution based on high-precision magnetic field tilt angle, provided by some embodiments of the present invention.

[0027] Some embodiments of this application provide a method for reconstructing plasma current profile distribution based on high-precision magnetic field tilt angle.

[0028] like Figure 1 As shown, the first embodiment of the present invention proposes a method for reconstructing plasma current profile distribution based on high-precision magnetic field tilt angle, including the following steps S1 to S5.

[0029] S1. Inject a neutral beam toward a designated point in the plasma core. It is understood that the designated point is a measurement point selected in the plasma core according to test requirements, and the final reconstruction result can be obtained through measurements at multiple designated points. As is known to those skilled in the art, the designated point can also be called a diagnostic point.

[0030] When a neutral beam is injected into a fusion plasma, the neutral beam interacts with the plasma and emits a Stark-polarized beam containing information about the magnetic field tilt angle.

[0031] In some embodiments, the designated point of the plasma core is located on a designated section of the plasma core, and on the designated section of the plasma core, the magnetic field at the designated point in the horizontal direction is approximated as 0.

[0032] S2. Use multiple polarizers with different polarization directions to receive the polarized beam transmitted from the plasma direction.

[0033] In this disclosure, the number of polarizers is four, and the polarization direction angles of the four polarizers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 10, 11, 12, 13, 14, 15, 16, 1 , and When polarized light passes through a polarizer, only the component of light parallel to the polarization axis of the polarizer can pass through. In other words, the intensity of polarized light passing through polarizers with different polarization angles is different.

[0034] S3. Measure the intensity of polarized light transmitted through the polarizer, and calculate the tilt angle of the magnetic field at a specified point in the plasma core based on the intensity ratio of the polarized light corresponding to each polarizer.

[0035] By using testing instruments to measure the intensity of polarized light transmitted through all polarizers, the tilt angle of the magnetic field can be calculated. Specifically, the calculation method is as follows:

[0036] in, Indicates the tilt angle of the magnetic field at a specified point in the core of the plasma; Indicates wavelength; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer.

[0037] S4. Collect magnetic measurement input data, including central solenoid coil current, poloidal field coil current, magnetic probe and magnetic flux loop value, etc.

[0038] It is understandable that the magnetic measurement input data refers to the general and special data required for the inversion of the plasma core current profile distribution.

[0039] S5. Based on the tilt angle of the magnetic field at a specified point in the plasma core and the magnetic measurement input data, perform the inversion of the current profile distribution in the plasma core.

[0040] In some embodiments, the inversion of the plasma core current profile distribution based on the tilt angle of the magnetic field at a specified point in the plasma core and magnetic measurement input data includes the following steps S51-S5.

[0041] S51. Based on the magnetic measurement input data, the Grad-Shafranov equilibrium equations are solved to obtain the initial equilibrium configuration. Specifically, the Grad-Shafranov equilibrium equations are equations well known to those skilled in the art for describing the equilibrium state of two-dimensional plasmas in ideal magnetohydrodynamics (MHD), particularly in axisymmetric toroidal plasmas, such as those in tokamak devices. The solutions to these equations provide detailed information on plasma shape and magnetic field configuration, which is crucial for understanding and controlling the behavior of fusion plasmas. The content and solution method of these equations are existing knowledge and will not be elaborated upon here.

[0042] S52. Based on the tilt angle of the magnetic field at a specified point in the plasma core, obtain the formula for the circumferential magnetic field at the specified point in the plasma core. Calculate the poloidal coil current component, plasma current component, and eddy current component in the circumferential magnetic field at the specified point according to the formula.

[0043] Specifically, since the horizontal magnetic field at the designated point is approximately zero, the magnetic fields in the vertical and circumferential directions have the following relationship with the tilt angle of the magnetic field at the designated point in the plasma core:

[0044] By transforming the above equation, we can obtain the formula for the circumferential magnetic field at a specified point in the plasma core:

[0045] in, , , All of these are known parameters of the diagnostic signals at designated points in the plasma core, specifically constants given based on the collected data and comparison with actual physical values; This indicates the circumferential magnetic field at a specified point in the plasma core; This indicates the magnetic field perpendicular to a specified point in the plasma core.

[0046] Understandably, in magnetic confinement fusion devices, such as tokamaks, the toroidal magnetic field is generated from multiple sources, including poloidal coil currents, plasma currents, and potentially existing eddy currents. These magnetic field components work together to form the magnetic field structure required to maintain plasma confinement. Once the formula for the toroidal magnetic field at a specified point in the plasma core is determined, existing algorithms can be used to calculate each component.

[0047] S53. Using the magnetic flux distribution of the initial equilibrium configuration as the initial magnetic flux for the Grad-Shafranov equilibrium equations, and substituting the poloidal coil current component, plasma current component, and eddy current component in the circumferential magnetic field at a specified point into the response equation of the Grad-Shafranov equilibrium equations, the plasma core current profile distribution is obtained. Specifically, a convergent plasma current profile distribution can be obtained using the least squares method.

[0048] Understandably, the results obtained in the plasma core current profile distribution inversion include not only the plasma core current profile distribution, but also related parameters such as safety factor and magnetic flux configuration distribution, providing important data support for plasma configuration control.

[0049] The present invention provides a plasma current profile distribution reconstruction system based on high-precision magnetic field tilt angle, which is applied to the plasma current profile distribution reconstruction method based on high-precision magnetic field tilt angle as described in any of the above technical solutions; the system includes: a high-precision magnetic field tilt angle measurement system, a data acquisition system, and a plasma configuration inversion system.

[0050] Figure 2 The operating topology of a plasma current profile distribution reconstruction system based on high-precision magnetic field tilt angle is shown.

[0051] Among them, the high-precision magnetic field tilt angle measurement system is used to measure the tilt angle of the magnetic field at a specified point in the plasma core; the data acquisition system is used to acquire magnetic measurement input data; the plasma configuration inversion system is connected to the high-precision magnetic field tilt angle measurement system and the data acquisition system, and is used to perform plasma core current profile distribution inversion based on the tilt angle of the magnetic field at a specified point in the plasma core and the magnetic measurement input data.

[0052] In some embodiments, such as Figure 3 As shown, the high-precision magnetic field tilt angle measurement system includes: a neutral beam injection unit 2, a polarizer unit 4, an optical lens unit, and a spectrometer 7.

[0053] The neutral beam injection unit 2 is used to inject a neutral beam into a designated point in the core of plasma 1. When the neutral beam is injected into the fusion plasma 1, the neutral beam interacts with the designated point in plasma 1 and emits a Stark polarized beam with magnetic field tilt information.

[0054] The polarizer unit 4 includes several polarizers 4 disposed along the propagation path of the neutral beam emission beam 3, wherein the neutral beam emission beam 3 is a Stark-polarized beam emitted after the neutral beam interacts with the plasma 1. Figure 3 As shown, there are four polarizers 4 arranged in a matrix, and the polarization direction angles of the four polarizers 4 are 0°, 0°, 0°, 0°, and 0° respectively. , and .

[0055] The optical lens unit includes optical collimating lenses 5 that correspond one-to-one with the positions of several polarizers 4; The spectrometer 7 is connected to the optical lens unit via optical fiber 6 and is used to measure the intensity of polarized light transmitted through polarizer 4.

[0056] Based on the above structure, the intensity of polarized light transmitted through each polarizer 4 can be collected. According to the calculation method in the above embodiment, the inclination angle of the magnetic field at a specified point in the core of plasma 1 can be obtained by measuring the intensity ratio of polarized light transmitted through different polarizers 4.

[0057] In some embodiments, the data source for the data acquisition system may be an existing diagnostic system, which refers to a series of devices and tools used in fusion experimental devices to monitor and measure plasma parameters.

[0058] In one specific embodiment, the data acquisition system is divided into a general data acquisition module and dedicated data acquisition software. The general data acquisition module and the real-time plasma configuration inversion system are installed in the same real-time service room. The general data acquisition module mainly acquires data collected by the magnetic measurement-related system, including the central solenoid coil current, the poloidal coil current, the magnetic probe and the magnetic flux loop value. This data is mainly used for the initial equilibrium configuration inversion of the real-time plasma configuration inversion system. The dedicated data acquisition software can perform data processing operations on some of the raw data that need to be preprocessed.

[0059] In some embodiments, the plasma configuration inversion system employs a real-time Linux system and is equipped with a GPU card for parallel computing to accelerate computation, as well as a reflective memory card for data interaction with a high-precision magnetic field tilt angle measurement system.

[0060] Specifically, the data acquired by the data acquisition system is shared with the plasma configuration inversion system via shared memory; the tilt angle of the magnetic field at a specified point in the plasma core, obtained by the high-precision magnetic field tilt angle measurement system, is shared with the plasma configuration inversion system via reflected memory. After acquiring the data, the data acquisition system writes it into the server's shared memory. Once the magnetic field tilt angles are all equal, the plasma configuration inversion system starts calculations to obtain relevant parameters such as the plasma current profile distribution. Specifically, after the magnetic field tilt angle is measured, it is written to a specified location in the reflected memory network via a reflected memory card, and then an interrupt is sent to the plasma configuration inversion system to indicate that the data has been updated.

[0061] It should be noted that, Figure 2 The system also includes components such as the flux equalization control system for feedback control of plasma current. The flux equalization control system is a control system used in magnetic confinement fusion devices. Its main function is to control the shape and position of the plasma, ensuring stable confinement. Based on the inversion results of the plasma configuration inversion system, a control request is generated, a control signal is produced, and actuators / mechanisms are controlled to achieve feedback control of the plasma.

[0062] In this specification, the illustrative expressions of the terms used do not necessarily refer to the same embodiments or examples. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0063] Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this invention shall be included within the scope of protection of this invention.

Claims

1. A method for reconstructing plasma current profile distribution based on high-precision magnetic field tilt angle, characterized in that, include: A neutral beam is injected toward a designated point in the plasma core; Multiple polarizers with different polarization directions are used to receive polarized beams transmitted from the plasma direction; The intensity of polarized light transmitted through the polarizer is measured, and the tilt angle of the magnetic field at a specified point in the plasma core is calculated based on the intensity ratio of the polarized light corresponding to each polarizer. Collect magnetic measurement input data, which includes the central solenoid coil current, the poloidal field coil current, the magnetic probe, and the magnetic flux loop value; Based on the tilt angle of the magnetic field at a specified point in the plasma core and the magnetic measurement input data, the current profile distribution of the plasma core is inverted. The designated point of the plasma core is located on a designated cross-section of the plasma core, and on the designated cross-section of the plasma core, the magnetic field of the designated point in the horizontal direction is approximated as 0; The process of inverting the plasma core current profile distribution based on the tilt angle of the magnetic field at a specified point in the plasma core and magnetic measurement input data includes: Based on the magnetic measurement input data, the Grad-Shafranov equilibrium equations are solved to obtain the initial equilibrium configuration; The formula for the circumferential magnetic field at the specified point of the plasma core is obtained based on the tilt angle of the magnetic field at the specified point of the plasma core. The poloidal coil current component, plasma current component, and eddy current component in the circumferential magnetic field at the specified point are calculated according to the formula. The magnetic flux distribution of the initial equilibrium configuration is used as the initial magnetic flux of the Grad-Shafranov equilibrium equation. The poloidal coil current component, plasma current component and eddy current component in the circumferential magnetic field at a specified point are substituted into the response equation of the Grad-Shafranov equilibrium equation to obtain the plasma core current profile distribution. The formula for the circumferential magnetic field at a specified point in the plasma core is: in, , , All parameters are known parameters of the diagnostic signals at specified points in the plasma core; This indicates the circumferential magnetic field at a specified point in the plasma core; This indicates the magnetic field perpendicular to a specified point in the plasma core.

2. The method for reconstructing plasma current profile distribution based on high-precision magnetic field tilt angle according to claim 1, characterized in that, The number of polarizers is four, and the polarization direction angles of the four polarizers are 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 10, 11, 12, 13, 14, 15, 16, 17, 1 , and .

3. The method for reconstructing plasma current profile distribution based on high-precision magnetic field tilt angle according to claim 2, characterized in that, The calculation of the tilt angle of the magnetic field at a specified point in the plasma core based on the intensity ratio of the polarized light corresponding to each polarizer includes: in, Indicates the tilt angle of the magnetic field at a specified point in the core of the plasma; Indicates wavelength; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer; Indicates the transmission polarization direction angle is The intensity of polarized light from the polarizer.

4. A plasma current profile distribution reconstruction system based on high-precision magnetic field tilt angle, characterized in that, The system is applied to the plasma current profile distribution reconstruction method based on high-precision magnetic field tilt angle as described in any one of claims 1 to 3; the system comprises: A high-precision magnetic field tilt angle measurement system is used to measure the tilt angle of the magnetic field at a specified point in the plasma core. The data acquisition system is used to collect magnetic measurement input data; The plasma configuration inversion system is connected in communication with a high-precision magnetic field tilt angle measurement system and a data acquisition system. It is used to perform plasma core current profile distribution inversion based on the tilt angle of the magnetic field at a specified point in the plasma core and magnetic measurement input data.

5. The plasma current profile distribution reconstruction system based on high-precision magnetic field tilt angle according to claim 4, characterized in that, The high-precision magnetic field tilt angle measurement system includes: Neutral beam injection unit, used to inject a neutral beam toward a designated point in the plasma core; A polarizer unit includes several polarizers disposed on the propagation path of a neutral beam emission beam, wherein the neutral beam emission beam is a Stark-polarized beam emitted after the neutral beam interacts with the plasma. The optical lens unit includes optical collimating lenses that correspond one-to-one with the positions of several polarizers; The spectrometer, connected to the optical lens unit via an optical fiber, is used to measure the intensity of polarized light transmitted through the polarizer.

6. The plasma current profile distribution reconstruction system based on high-precision magnetic field tilt angle according to claim 5, characterized in that, The number of polarizers is four, arranged in a matrix, and the polarization direction angles of the four polarizers are 0, ... , and .

7. The plasma current profile distribution reconstruction system based on high-precision magnetic field tilt angle according to claim 4, characterized in that, The data acquired by the data acquisition system is shared with the plasma configuration inversion system via shared memory. The plasma configuration inversion system is equipped with a reflective memory card for data interaction with the high-precision magnetic field tilt angle measurement system. That is, the tilt angle of the magnetic field at a specified point in the plasma core obtained by the high-precision magnetic field tilt angle measurement system is shared with the plasma configuration inversion system through the reflective memory.

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