A Fusion Reactor Plasma Density and Temperature Diagnosis Method Based on Thomson Scattering Weak Coherence Technique

A technology of plasma and diagnostic methods, which is applied in the field of ion density and temperature diagnosis, and achieves the effects of high diagnostic resolution, easy control, and fast measurement speed

Inactive Publication Date: 2016-08-24
中国人民解放军陆军军官学院
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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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  • A Fusion Reactor Plasma Density and Temperature Diagnosis Method Based on Thomson Scattering Weak Coherence Technique
  • A Fusion Reactor Plasma Density and Temperature Diagnosis Method Based on Thomson Scattering Weak Coherence Technique
  • A Fusion Reactor Plasma Density and Temperature Diagnosis Method Based on Thomson Scattering Weak Coherence Technique

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Embodiment Construction

[0039] Such as figure 2 As shown, the 1064nm light emitted by the Nd:YAG laser passes through the bandwidth modulator, modulates into low coherent light and splits it into two beams through the beam splitter, one beam of weak light is reflected by the scanning system of the reference arm to form a reference beam, and the other beam of strong light passes through The objective lens is focused into the fusion reactor plasma, and its backscattered light and reference light are recombined at the fiber coupler. The output of the coupler is the coherent superposition of the reference light and the backscattered light. After the grating splits the light, it is detected by the photodetector CCD, and the spectral signal is converted into an electrical signal, and then the analog signal is converted into a digital signal and stored in the computer. , and finally the signal processing and image display are realized by software.

[0040] Specific embodiments of the present invention are...

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Abstract

A fusion reactor plasma density temperature diagnosis method based on Thomson scattering weak coherence technology. The light returned by the reference arm and the detection arm interferes and is divided into interference spectrum signals of different wavelengths through the grating, which are received by the array CCD and undergo Fourier transformation to obtain the direction of the incident light, that is, the axial scattering intensity distribution, and then through Rayleigh scattering or Raman scattering absolute calibration to obtain the axial distribution information of the plasma electron density; obtain the thermal motion rate information of the electrons from the Doppler broadening of the spectral line, thereby obtaining the temperature distribution of the plasma electrons; The translation adjustment changes the optical path difference to realize the measurement of large depth plasma (greater than 1m). The invention utilizes Thomson's backscattering optical coherence tomography technology to measure the online measurement of the temperature and density of fusion reactor plasma electrons.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05H1/00
Inventor 杨锦宏汪卫华欧靖高宏祁俊力张强华
Owner 中国人民解放军陆军军官学院
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