Fusion reactor plasma density and temperature diagnosing method based on Thomson scattering weak coherent technique

Abstract

The invention discloses a fusion reactor plasma density and temperature diagnosing method based on the Thomson scattering weak coherent technique. The method comprises the steps that a broadband low-coherency intense light source is set, a bandwidth modulator is set, a beam splitting system is set, a reference arm is used for generating an optical path difference and a frequency shift signal, the light returned from the reference arm and a detection arm interferes and passes through an optical grating to be divided into interference spectrum signals with different wavelengths to be received by an array CCD, the incident light direction, namely the axial scattering intensity distribution is obtained through the Fourier transform, and the plasma electron density axial distribution information is obtained through rayleigh scattering or raman scattering absolute calibration; the thermal motion rate information of electrons is obtained through the Doppler broadening of a spectral line, and then the plasma electron temperature distribution is obtained; the horizontal movement adjustment is carried out on the length of the reference arm to change the optical path difference changing so as to achieve measurement on the great depth plasma with the depth larger than 1 m. The electron temperature and density of the fusion reactor plasma are measured online through the Thomson back scattering optical coherent chromatographic technique.

Description

technical field [0001] The invention relates to a method for diagnosing the density and temperature of fusion reactor plasma, in particular but not limited to a method for diagnosing the plasma density temperature of fusion reactor using Thomson scattering weak coherence technology. Background technique [0002] (1) Plasma diagnostic technology [0003] One of the main physical problems faced by magnetic confinement nuclear fusion is how to effectively realize the long-term operation of the tokamak, which requires a comprehensive understanding and control of the magnetic islands, internal transport barriers, and boundary transport barriers inside the plasma. The first problem is to have an accurate and valid diagnostic method for these structures. High-temperature plasma diagnosis methods include probe method, microwave method, induction coil method, cyclotron resonance method, laser method, X-ray method, spectroscopy method, optical method (visible light), particle beam me...

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Problems solved by technology

[0024] The present invention utilizes Thomson's backscattering weak coherence technology to diagnose the method of plasma until now there is no relevant research report

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