A Mass Spectrometry Device for Studying Plasma-Small Molecule System Reaction

A plasma and small molecule technology, which is applied in the field of mass spectrometry devices for the reaction of ions and gas-phase small molecule systems, can solve problems such as cognitive limitations and lack of images, and achieve the effect of high-efficiency ionization and clear cognition

Inactive Publication Date: 2018-06-26
DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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Problems solved by technology

For a clear understanding of the above process, there is still a lack of clear images. To a large extent, the understanding of the above-mentioned reactions involving plasma and oxygen is limited due to the limitations of the above-mentioned model establishment and analysis methods.

Method used

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  • A Mass Spectrometry Device for Studying Plasma-Small Molecule System Reaction
  • A Mass Spectrometry Device for Studying Plasma-Small Molecule System Reaction

Examples

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Embodiment 1

[0029] Product Analysis of Iron Plasma Reacted with Oxygen

[0030] This example is intended to illustrate the performance of the device for analyzing and characterizing the product after the iron plasma reacts with oxygen. In this embodiment, iron plasma is generated by nanosecond laser sputtering. The parameters of the nanosecond laser are as follows. The laser wavelength is 532 nanometers, the repetition rate is 20 Hz, the energy is 30 milliwatts, and the pulse width is 20 nanoseconds. It is focused on the surface of iron through a lens with a focal length of 30 cm. The power density of the area laser is about 2.75×10 7 W / cm 2 . High-purity oxygen (99.99%) enters the plasma generation area through a metal capillary with an inner diameter of 0.5 mm in the form of a jet. The voltage applied to the extraction electrodes was 1600 volts. The femtosecond laser uses a pulse width of 30-40 femtoseconds, an energy of 3.3 millijoules, and a wavelength of around 800 nanometers. I...

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Abstract

The invention relates to a mass spectrometry device for studying plasma-small molecule system reactions. The mass spectrometer for researching plasma-small molecule system reaction comprises plasma-small molecule reaction unit (1), femtosecond laser ionization system (2), ion extraction system (3), mass analyzer (4), Vacuum chamber (5). Among them, the nanosecond laser sputtering solid target is used to generate plasma, and the gas phase small molecules enter the plasma generation area through the capillary, and react with the plasma near the surface of the target. Femtosecond laser ionization technology was used to ionize the reaction products, and finally, combined with time-of-flight mass spectrometry, the reaction products were analyzed and confirmed. The device can accurately, efficiently and real-time characterize the product composition of the reaction between plasma and gas phase molecules, and provide model support for the accurate cognition of the actual plasma and gas reaction in the production process.

Description

technical field [0001] The invention relates to the field of microscopic chemical reaction kinetics, in particular to a mass spectrometry device for studying the reaction of plasma and gas-phase small molecule systems, which can accurately analyze the products of the reaction process between plasma and gas-phase small molecules. Background technique [0002] Microscopic chemical reaction kinetics aims to explore the chemical reaction process at the atomic and molecular level, and hopes to realize the regulation of the reaction and make the reaction proceed in a more favorable direction. Plasma is an unavoidable companion in the laser processing process. A relatively simple example, such as in the process of high-power laser cutting metal, will generate plasma when the laser power reaches a certain threshold. The generation of the above-mentioned plasma will defocus the laser and absorb the energy of the laser so that the cutting ability of the laser is greatly weakened. How...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01J49/26G01N27/62
Inventor 刘本康王利王艳秋边晨光李晓营
Owner DALIAN INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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