Method for measuring two-dimensional distribution of impurities in divertor area of nuclear fusion device

By using a visible light imaging system and mathematical inversion methods, the problems of regional coverage and accuracy in measuring impurity distribution in nuclear fusion devices have been solved, achieving high spatial resolution impurity distribution measurement and optimizing the design and operational stability of fusion devices.

CN120908127APending Publication Date: 2025-11-07SOUTHWESTERN INST OF PHYSICS
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Patent Information

Application Number
CN202511110133.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-08-08
Publication Date
2025-11-07

AI Technical Summary

Technical Problem

Existing methods for measuring two-dimensional impurity distribution have limited coverage areas and low accuracy in nuclear fusion devices, affecting plasma confinement quality and fusion efficiency. Furthermore, existing vacuum ultraviolet systems are difficult to accurately measure impurity distribution in the divertor region.

Method used

A visible light imaging system is used to acquire plasma radiation image data, perform image correction and absolute calibration, and combine narrowband filters and mathematical inversion to achieve high spatial resolution measurement of impurity distribution.

Benefits of technology

It provides high-precision information on impurity distribution, which helps in the study of impurity transport mechanisms, optimizes the design of fusion devices, and improves plasma performance and device stability.

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Abstract

The invention relates to the technical field of nuclear fusion, in particular to a method for measuring two-dimensional distribution of impurities in a divertor area of a nuclear fusion device, high-spatial-resolution impurity distribution can be obtained through a visible light imaging system and collection of plasma radiation image data, the transport mechanism of the impurities in an edge area can be researched more finely, and the measurement accuracy of the impurities in the divertor area is improved. After a plasma image is collected, the plasma image is corrected and absolutely calibrated so as to ensure the accuracy of measurement data, and finally, the corrected plasma image is subjected to grid division and tomographic inversion so as to obtain a spatial distribution diagram of impurities. According to the invention, the plasma boundary radiation characteristic and the divertor region impurity distribution can be measured, so that the space distribution and the impurity transport rule of the divertor region impurities can be given, and key physical information can be provided for fusion device plasma impurity control and radiation divertor related experiments.
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