Method detecting instant temperature of graphite tile of partial filter of magnetic confinement fusion device

Abstract

The invention relates to the field of nuclear fusion and optical diagnosis and discloses a method for detecting instant temperature of a graphite tile of a partial filter of a magnetic confinement fusion device. The technical schemes includes that when the magnetic confinement fusion device works normally, terahertz waves are perpendicularly injected into the graphite tile from a position outside a window, and a probe is used for measuring and recording a terahertz time-domain spectrum Omega<T>(t) reflected by the graphite tile under working temperature. The time-domain spectrum is analyzed and processed and transformed in Fourier transformation in an effective frequency domain to obtain a frequency domain spectrum F<T>(omega) under the working temperature. At the moment, data automatically selects a characteristic spectral line, reads positions of the characteristic spectral line in a data base under calibrated temperature, frequency shift amount is obtained by comparing the two positions, a functional relationship of frequency shift amount - temperature of the data base is compared with the frequency shift amount, and the instant temperature is then calculated, outputted and led to a computer system to be stored. According to the method for detecting the instant temperature of the graphite tile of the partial filter of the magnetic confinement fusion device, technology of reflecting the terahertz time-domain spectrum is adopted, the thermal shock instant temperature of the graphite tile of the partial filter of the magnetic confinement fusion device can be detected online, synchronously, and without contact or damage.

Description

technical field [0001] The invention relates to the field of nuclear fusion and optical diagnosis, in particular to a method for detecting the transient temperature of the graphite tile of the divertor of the magnetic confinement fusion device. Compared with the traditional thermocouple thermometer, the method can quickly and synchronously return temperature data. And no contact damage. Background technique [0002] Terahertz (THz) waves usually refer to electromagnetic waves with a frequency between 0.1THz and 10THz, between microwave and infrared. The terahertz time-domain spectroscopy system is a coherent detection technology that can obtain the amplitude information and phase information of the terahertz pulse at the same time. By performing Fourier transform on the time waveform, the optical parameters such as the absorption coefficient and refractive index of the sample can be directly obtained. Terahertz time-domain spectroscopy has been widely used in the analysis o...

AI Technical Summary

Problems solved by technology

The traditional thermocouple thermometer can only measure the temperature indirectly, and cannot accurately describe the temperature state of the graphite tile in real time, so it is necessary to use a method to synchronize and accurately detect the high temperature environment

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