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Small time-of-flight mass spectrometer

A time-of-flight mass spectrometry, small-scale technology, applied in time-of-flight spectrometers, mass spectrometers, dynamic spectrometers, etc., can solve the problems of unsuitable for portable gas composition detection, large volume, heavy mass, etc., to reduce mass and improve resolution rate, reducing the effect of energy dispersion

Pending Publication Date: 2021-06-29
LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH
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  • Claims
  • Application Information

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Problems solved by technology

The common disadvantages of existing time-of-flight mass spectrometers are high power consumption, large volume, and heavy mass, so they are not suitable for portable gas composition detection and space environment detection

Method used

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  • Small time-of-flight mass spectrometer

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Embodiment Construction

[0011] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0012] The present invention provides a small time-of-flight mass spectrometer, such as figure 1 As shown, it includes a vacuum chamber 1 , an ion source 2 , an ion transmission system 3 , an acceleration region 4 , a field-free flight region 5 , a reflection region 6 and an ion detector 7 . Wherein, the ion source 2, the ion transmission system 3, the acceleration area 4, the field-free flight area 5, the reflection area 6 and the ion detector 7 are all installed in the vacuum chamber 1, and the ion transmission system 3 is connected with the ion source 2 and the acceleration area 4 respectively. The field-free flight area 5 is connected with the acceleration area 4 and the reflection area 6, and the ion detector 7 is connected with the field-free flight area 5. Wherein, the acceleration zone 4 and the reflection zone 6 are respectively positioned at bot...

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Abstract

The invention discloses a small time-of-flight mass spectrometer. The small time-of-flight mass spectrometer comprises a vacuum cavity, an ion source, an ion transmission system, an acceleration area, a field-free flying area, a reflection area and an ion detector, wherein the acceleration area and the reflection area are located on the two sides of the field-free flying area respectively; the electric field of the field-free flying area is 0, and the electric field direction of the reflection area is opposite to that of the acceleration area; and the ion detector and the acceleration area are located on the same side of the field-free flying area. According to the invention, a vertical introduction reflection type structure is adopted, the spatial dispersion and energy dispersion of ions are greatly reduced, the resolution of an instrument is improved, and meanwhile, a quadrupole rod structure is not adopted to modulate the ions in the transmission process, so that the mass, the volume and the power consumption of the mass spectrometer are greatly reduced.

Description

technical field [0001] The invention relates to the technical field of vacuum measurement and instruments, in particular to a small time-of-flight mass spectrometer. Background technique [0002] Since the time-of-flight mass spectrometer was invented, people have conducted in-depth and extensive research on it. Compared with other types of mass spectrometers such as magnetic deflection, quadrupole and ion trap, time-of-flight has fast analysis speed and theoretically no mass upper limit. It is widely used in environmental monitoring, food safety, judicial department, aerospace and other fields. [0003] A time-of-flight mass spectrometer is mainly composed of an ion source, a time-of-flight mass analyzer, an ion detector and electronics. The common disadvantages of existing time-of-flight mass spectrometers are high power consumption, large volume, and heavy mass, so they are not suitable for portable gas composition detection and space environment detection. Contents of...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/40H01J49/02
CPCH01J49/405H01J49/025
Inventor 郭美如董猛孙雯君李刚裴晓强任正宜管保国
Owner LANZHOU INST OF PHYSICS CHINESE ACADEMY OF SPACE TECH