A Measuring Device for Erosion and Redeposition of Tokamak Wall Material

Abstract

The invention relates to the technical field of nuclear fusion and optical diagnosis, and provides a device for measuring erosion and redeposition of Tokamak wall materials. The device comprises a laser incidence unit, an interference unit, a phase shifting unit, an image collecting unit and a sequential control unit. The laser incidence unit comprises a first laser apparatus, a second laser apparatus, a transmitting and reflecting lens, a first aperture stop, a spatial filter and a convex lens. The interference unit comprises a beam splitter and a reflector which are sequentially arranged. The phase shifting unit comprises piezoelectric ceramic and a piezoelectric ceramic control box which are sequentially arranged. The image collecting unit comprises an industrial camera. The sequential control unit comprises a data collecting control box. By means of the device, online, nondestructive, high-accuracy, high-sensitivity, three-dimensional and quantitative monitoring of the erosion and the redeposition of the Tokamak wall materials can be achieved.

Description

technical field [0001] The invention relates to the technical field of nuclear fusion and optical diagnosis, in particular to a measuring device for erosion and redeposition of tokamak wall materials. Background technique [0002] In the experimental research of magnetic confinement nuclear fusion, carbon materials are widely used as the first wall material of tokamak because of their good thermal conductivity and low atomic number. During the operation of the tokamak, the first wall is exposed to high heat flow and high particle flow. At the same time, chemical erosion, physical sputtering and various thermal effects will also cause erosion of the first wall material. The eroded material sputters a large amount of impurities, which affects the operation safety of the tokamak. The eroded carbon material combined with hydrogen atoms can form an impurity deposition layer on the first wall, which is redeposition. At the same time, tritium retention will greatly shorten the op...

AI Technical Summary

Problems solved by technology

[0004] The invention mainly solves technical problems such as insufficient spatial resolution, incapability of real-time measurement, and inability to work in a vibration environment in the prior art, and proposes a measurement device for erosion and redeposition of tokamak wall materials to realize erosion of tokamak wall materials On-line, non-destructive, high-precision, high-sensitivity, three-dimensional and quantitative monitoring of redeposition

Digital speckle interferometry has been relatively mature in terms of non-destructive and full-field measurement, and has a wide range of application examples. Here, the present invention applies digital speckle interferometry to the tokamak environment to solve the problem of insufficient spatial resolution and inability to Problems with real-time measurements

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