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US 8,076,638 B2Granted
Drift tube structure for ion mobility spectrometer
AssigneeNuctech Company Limited
InventorsHaifeng Hu, Yuanjing Li, Qingjun Zhang, Zhiqiang Chen
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AssigneeNuctech Company Limited
InventorsHaifeng Hu, Yuanjing Li, Qingjun Zhang, Zhiqiang Chen
Estimating the term…
A drift tube structure for ion mobility spectrometer is disclosed comprising electrode sheets and insulation parts arranged in alternation, with each electrode sheet being a mesh metal sheet having a radian or taper portion which is convexly curved toward an ion input. Further, the radian or taper portion of the electrode sheet has meshes of higher transparency. With the above structure of the present invention, an electric field having a periphery of uniform focusing center can be formed in the migration zone. The circular ring configuration of the electric field periphery can shield the migration electric field from any influence of external electric fields. The electrodes are each meshlike and have a circular hole at the center, thus they can focus and collect as many as possible ions that do not move along the central axis, and those ions moving along the central axis can pass through the electrodes transparently.
A drift tube structure for ion mobility spectrometer, comprising electrode sheets and insulation parts arranged in alternation, with each electrode sheet being a mesh metal sheet having a radial or taper portion which is convexly curved toward an ion input, wherein the radial or taper portion of the electrode sheet has meshes of higher transparency and the center of the electrode sheet is a circular hole such that ions moving along a central axis of the drift tube can pass through the electrode sheets transparently.
Dependencies are inferred from the claim text.