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Mass spectrum analyzing apparatus of plume micro-particles in laser welding

A technology of laser welding and mass spectrometry analysis, applied in the field of mass spectrometry analysis, can solve the problems of limiting the understanding of the overall characteristics of the plume and the inability to accurately judge the ion composition, and achieve the effect of accurate composition

Active Publication Date: 2018-05-08
DALIAN NATIONALITIES UNIVERSITY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the detailed composition of the ions inside Yuhui cannot be accurately judged, which greatly limits the understanding of the overall characteristics of Yuhui.

Method used

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  • Mass spectrum analyzing apparatus of plume micro-particles in laser welding

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Embodiment

[0032] Based on liquid nitrogen cooling, femtosecond laser strong field ionization detection is used as a mass spectrometer analysis device for plume particles in the laser welding process of ionization means. The aperture diameter of sampling cone 1a in the present embodiment is 0.5 millimeter, and the internal cooling system of sampling cone 1a is connected together with the side wall of sampling cone 1a by a copper cable, and cooling system 1b then adopts liquid nitrogen to cool, so Here, it can be ensured that the surface of the sampling cone 1a will not be melted by the high temperature when sampling the high temperature plume during the laser welding process. At the same time, the vacuum of the sampling chamber 1 is extracted by a vacuum pump with a pumping speed of 4L / s. The opening diameter of the skimmer 2a connected to the sampling chamber 1 is 0.3mm, and an 8L / s mechanical pump is used as a backing pump, and a 1200L / s turbomolecular pump is added for vacuum extracti...

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Abstract

The application discloses a mass spectrum analyzing apparatus of plume micro-particles in laser welding, and belongs to the technical field of mass spectrometry. The apparatus comprises a micro-particle sampling unit and a vacuum cavity system, the micro-particle sampling unit comprises a sampling cone, an interception cone and a collimation cone arranged in a coaxial manner, the sampling cone, the interception cone and the collimation cone separate the vacuum cavity system into a sampling chamber, an interception chamber and an ionization sampling chamber in sequence, the sampling chamber isconnected with a cooling system and a mechanical vacuum pump, the interception chamber is connected with a vacuum pump set A, the ionization sampling chamber is connected with a vacuum pump set B, a laser ionization device is located at the outside of the ionization sampling chamber, and an ion extraction system, a mass analyzer and an ion detector are arranged in the ionization sampling chamber in sequence. According to the apparatus, based on the knowledge and understanding of spectrum information of plume generated in a laser welding process, the components of the micro-particles thereof are further understood and determined accurately and deeply.

Description

[0001] This application is a divisional application with application number 201711120072X, application date November 14, 2017, and title of invention "A mass spectrometry device for plasma plume particle components in laser welding" technical field [0002] The invention relates to a mass spectrometry analysis device for microparticle components, and belongs to the technical field of mass spectrometry analysis. Background technique [0003] As an important branch of modern analytical technology, mass spectrometry has important applications in basic scientific research such as physics, chemistry, biotechnology or application frontier fields such as food quality testing, environmental monitoring and many other aspects that are closely related to life. Its working principle is also relatively simple, mainly to distinguish ions according to their different charge-to-mass ratios and finally identify their corresponding components. Mass spectrometry can directly analyze ions throu...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/04
CPCH01J49/0418
Inventor 刘本康王利
Owner DALIAN NATIONALITIES UNIVERSITY