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Magnetic deflection mass spectrometer based on cylindrical electric field analyzer

A magnetic deflection mass spectrometer and analyzer technology, which is applied in the direction of material analysis, analysis materials, instruments, etc. by electromagnetic means, can solve the problems of influence and the resolving power of the magnetic deflection mass spectrometer can not be substantially improved, so as to improve the resolving power , extending the quality detection range, and reducing weight

Active Publication Date: 2017-02-15
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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Problems solved by technology

[0003] Generally, a magnetic deflection mass spectrometer is composed of an ion source, a magnetic field mass analyzer and an ion current detector. Although compared with other types of mass spectrometers, it also has the advantages of simple structure, good mass spectrum peak shape and quantitative performance, but due to the ion source The divergence of ion energy and the energy dispersion of the magnetic field analyzer prevent the resolving power of the magnetic deflection mass spectrometer from being substantially improved, thus affecting the analysis of particles with similar mass numbers

Method used

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  • Magnetic deflection mass spectrometer based on cylindrical electric field analyzer
  • Magnetic deflection mass spectrometer based on cylindrical electric field analyzer
  • Magnetic deflection mass spectrometer based on cylindrical electric field analyzer

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Embodiment 1

[0027] Such as figure 1 As shown, a magnetic deflection mass spectrometer based on a cylindrical electric field analyzer, the magnetic deflection mass spectrometer mainly includes an ion source 1, a first slit 2, a cylindrical electric field analyzer 3, a second slit 4, and a magnetic field analysis Device 5 and ion flow detector 6;

[0028] Wherein, the cylindrical electric field analyzer 3 and the magnetic field analyzer 5 are reversely connected in series; the ion beam exit maximum deflection angle γ of the magnetic field analyzer 5 max Satisfy the relationship shown in formula (I), the radius r of the curved surface satisfies the relationship shown in formula (II); the distance d between the ion source 1 and the first slit 2 1 , the distance d between the end face of the magnetic field analyzer 5 and the second slit 4 1 Satisfy the relationship shown in formula (Ⅲ); the deflection angle Φ of the electric field analyzer satisfies the relationship shown in formula (Ⅳ);

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Abstract

The invention discloses a magnetic deflection mass spectrometer based on a cylindrical electric field analyzer, and belongs to the technical field of instruments. The magnetic deflection mass spectrometer mainly comprises an ion source, a first slit, a cylindrical electric field analyzer, a second slit, a magnetic field analyzer and an ion flow detector; wherein, the cylindrical electric field analyzer and the magnetic field analyzer are connected in a reversed series connection; the magnetic deflection mass spectrometer ensures mutual offset of energy dispersion generated by magnetic fields and electric fields, so that the magnetic deflection mass spectrometer has dual focusing capability of energy and direction, and distinguishing ability is substantially improved.

Description

technical field [0001] The invention relates to a magnetic deflection mass spectrometer, which belongs to the technical field of instruments and meters. Background technique [0002] Magnetic deflection mass spectrometer has a series of advantages such as simple structure, insensitivity to pollution, good peak shape and quantification of mass spectrum, and has been widely used in space science detection. However, with the continuous development of aerospace technology, higher requirements are put forward for magnetic deflection mass spectrometers, such as high sensitivity, high resolving power, wide mass range, and real-time online analysis and detection. [0003] Generally, a magnetic deflection mass spectrometer is composed of an ion source, a magnetic field mass analyzer, and an ion current detector. Although compared with other types of mass spectrometers, it also has the advantages of simple structure, good mass spectrum peak shape and quantitative performance, but due ...

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Application Information

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IPC IPC(8): G01N27/62
CPCG01N27/62
Inventor 董猛李得天成永军习振华张虎忠李艳武王永军吉康
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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