Corona discharge assembly and ion migration spectrometer including same

A technology of corona discharge and components, which is applied in the field of ion mobility spectrometer, can solve the problems of increasing the instability of corona ion source and the short life of single-needle corona ion source, so as to improve the service life, reduce loss, and electrode The effect of precise and stable position
CN104752149AActive Publication Date: 2015-07-01NUCTECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
NUCTECH CO LTD
Publication Date
2015-07-01

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Abstract

The present invention discloses a corona discharge assembly, including: an ionization discharge chamber, wherein the ionization discharge chamber includes a metal corona cylinder, and the metal corona cylinder is provided with an inlet of a gas to be analyzed and an annular piece-shaped port which forms a non-uniform electric field with corona pins and is provided with a circular hole at the middle; a rotating shaft is installed on the cylinder wall of the metal corona cylinder in an insulating manner, the rotating shaft is vertical to the axial line of the metal corona cylinder, and a turntable provided with multiple corona pins at the outer edge is installed at the end part of the rotating shaft the axial line of the metal corona cylinder passes in parallel through the rotation plane of the turntable. The present invention further discloses an ion mobility spectrometer using the above-mentioned corona discharge assembly.
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Description

technical field

[0001] The invention relates to the technical field of safety detection, in particular to an easy-to-manufacture multi-needle long-life corona discharge assembly and an ion mobility spectrometer using the assembly as an ionization source for detecting drugs and explosives. Background technique

[0002] The ion mobility spectrometer realizes the resolution of ions according to the different drift speeds of different ions under a uniform weak electric field. It has the advantages of fast resolution, high sensitivity, no vacuum environment, and easy miniaturization, so it has been widely used in the detection of drugs and explosives. A typical ion mobility spectrometer usually consists of an injection part, an ionization part, an ion gate, a migration region, a collection region, a readout circuit, data acquisition and processing, and a control part. The main function of the ionization part is to convert the sample molecules into ions that can be migrated and s...

Claims

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