Laser inductive dissociation spectrum detection system for space environment simulation and detection method thereof

A space-simulating, laser-induced technology, applied in the field of laser-induced dissociation spectroscopy detection, can solve problems such as element type identification errors, and achieve a universal effect

Active Publication Date: 2007-02-07
SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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Problems solved by technology

Due to the inevitable "wavelength accuracy" problem of the linear CCD grating spectrometer, there is a certain error between the wavelength value of the spectral line directly read by the spectral analysis a

Method used

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  • Laser inductive dissociation spectrum detection system for space environment simulation and detection method thereof
  • Laser inductive dissociation spectrum detection system for space environment simulation and detection method thereof
  • Laser inductive dissociation spectrum detection system for space environment simulation and detection method thereof

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Embodiment Construction

[0029] The following is based on Figure 1 ~ Figure 3 A preferred embodiment of the present invention is given to illustrate the structural features, technical performance and functional features of the present invention, but not to limit the scope of the present invention.

[0030] The system includes the following parts:

[0031] 1) Laser

[0032] Nd:YAG Q-switched pulse laser is selected, the working wavelength is 1064nm, the pulse width is 3-5ns, the maximum pulse energy is 200mJ, the pulse energy stability is ±2%, the maximum pulse repetition frequency is 20Hz, and the laser beam divergence angle is less than 1mrad. A beam of light from a laser is used to excite the sample to generate a plasma spectrum.

[0033] 2) Spectrometer

[0034] The spectrometer is used for spectral analysis of the laser-induced plasma spectrum collected by the probe. The spectrometer uses a concave grating. The response wavelength of the grating is 200-600nm, and the reticle is 1200g / mm. Th...

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Abstract

The disclosed laser induced dissociation optical spectrum detection system comprises: a pulse laser, a focus lens, a spectrograph, a pulse delay generator, a computer, and a vacuum sample room. This invention recognizes element type by comparing acquired unknown sample atomic spectrum data and normal data, and reduces the error to zero in principle.

Description

technical field [0001] The invention relates to laser-induced dissociation spectrum detection technology, in particular to a laser-induced dissociation spectrum detection system and detection method with simulated space environment conditions. Background technique [0002] The detection technology of material element composition was first developed by X-ray detection technology (XRF), and then by laser-induced dissociation spectroscopy (LIBS). LIBS is based on the organic combination of laser technology and spectroscopy technology. It is a new type of material Element detection and analysis technology, its working mechanism is: the high-energy pulsed laser beam converges on the surface of the material through the converging lens, and the trace substances at the converging point are vaporized and ionized in a very short time to form high-temperature and high-pressure plasma; Particles excited to a high-energy state radiate a plasma spectrum during the decay process. These spe...

Claims

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Application Information

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IPC IPC(8): G01N21/63
Inventor 舒嵘亓洪兴吕刚马德敏
Owner SHANGHAI INST OF TECHNICAL PHYSICS - CHINESE ACAD OF SCI
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