Superhigh-temporal resolution laser Thomson scattering diagnosis system

A technology of time resolution and diagnosis system, applied in the field of ultra-high time resolution laser Thomson scattering diagnosis system, which can solve problems such as limitations

Inactive Publication Date: 2016-03-30
INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

The time resolution of laser Thomson scattering diagnosis of existing devices is limited to the order of ms, that is, the maximum laser pulse frequency is at the level of hundreds of Hz

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  • Superhigh-temporal resolution laser Thomson scattering diagnosis system

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Embodiment Construction

[0012] Such as figure 1 As shown, a laser Thomson scattering diagnostic system with ultra-high time resolution includes a laser 5, a laser beam optical path transmission component 6, an EAST tokamak device 7, a large-aperture large-field-of-view optical imaging system 8, and 30 signal Transmission optical fiber 9, 30 spectrometers 10 and a data acquisition and processing system 11 with a GHz sampling frequency. The laser 5 generates a series pulse laser with a pulse repetition frequency of 4KHz and a wavelength of 1064nm. In device 7, in the EAST tokamak device 7, Thomson scattering occurs due to the interaction between laser and plasma, and the scattered signal is imaged to the end faces of 30 optical fibers 9 through the imaging system 8 with large aperture and large field of view, and the scattered signal is transmitted by 30 signal transmission optical fibers 9. Import 30 spectrometers 10 respectively. After photoelectric conversion, the 30 spectrometers 10 respectively en...

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Abstract

The invention discloses a superhigh-temporal resolution laser Thomson scattering diagnosis system. A laser produces multi-pulsed laser with a pulse repetition rate of 4KHz and wavelength of 1064nm. A laser beam goes through a laser beam optical path transmission assembly and is focused and introduced into an EAST Tokamak device, in the EAST Tokamak device, laser and plasma interact and produce Thomson scattering, the scattered signal is imaged on end surfaces of multiple optical fibers through a large-aperture large-field angle imaging system, the scattered signal is respectively transmitted into 30 spectrometers through optical fiber transmission and is subjected to photovoltaic conversion under the action of the 30 spectrometers and the electric signal is respectively fed into a GHz sampling frequency data acquisition and processing system. The large energy high frequency continuous output laser is used as a laser Thomson scattering active diagnosis light source so that necessary conditions are provided for Thomson superhigh-temporal resolution diagnosis and the superhigh-temporal resolution laser Thomson scattering diagnosis is realized.

Description

technical field [0001] The invention relates to the technical field of nuclear fusion device tokamak physical diagnosis, in particular to an ultra-high time resolution laser Thomson scattering diagnosis system. Background technique [0002] At present, tokamak fusion research is being carried out extensively in the world. Laser Thomson scattering diagnosis is one of the most important diagnostics in tokamak fusion research. Because the measurement principle has no assumptions and the measurement results are accurate, it is widely used in fusion research circles. It is recognized that it can simultaneously provide the important basic parameter electron temperature in the study of plasma physics T e and density N e The most reliable diagnostic tool for the temporal and spatial distribution of The time resolution of the laser Thomson scattering diagnosis of the existing device is limited to the order of ms, that is, the maximum laser pulse frequency is at the level of hundr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/47
CPCG01N21/47
Inventor 臧庆胡爱兰陈慧
Owner INST OF PLASMA PHYSICS CHINESE ACAD OF SCI
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