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Multi-channel high-field asymmetric waveform ion migration tube

A wave-shaped ion migration, high-field asymmetric technology, applied in electronic/ion optical devices, parts of particle separator tubes, etc., can solve problems such as weak ion signal and difficulty in ensuring coaxiality

Active Publication Date: 2021-04-20
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] In view of the above problems, the purpose of the present invention is to provide a movable multi-channel high-field asymmetric waveform ion transfer tube to solve the problem of large internal and external electrode gaps and weak ion signals in existing cylindrical transfer tubes. It is difficult to ensure the coaxiality of the inner and outer electrodes

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  • Multi-channel high-field asymmetric waveform ion migration tube
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  • Multi-channel high-field asymmetric waveform ion migration tube

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Embodiment Construction

[0029] In the following description, for purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It may be evident, however, that these embodiments may be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0030] Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0031] figure 1 shows the structure of a multi-channel high-field asymmetric waveform ion transfer tube according to an embodiment of the present invention, figure 2 shows a first side cross-sectional view of a migration zone 7 according to an embodiment of the invention, image 3 shows a second side cross-sectional view of the migration zone 7 according to an embodiment of the invention, Figure 4 shows a third side sec...

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Abstract

The invention provides a multi-channel high-field asymmetric waveform ion migration tube. The multi-channel high-field asymmetric waveform ion migration tube comprises a migration region and a detection region arranged at the output end of the migration region, wherein the migration region comprises a columnar inner electrode and an annular outer electrode, the columnar inner electrode is sleeved with the annular outer electrode, and an electrode gap is formed between the annular outer electrode and the columnar inner electrode; a through type isolation column is arranged in the electrode gap, and the through type isolation column divides the electrode gap into at least one migration channel; and moreover, the columnar inner electrode and the annular outer electrode are coaxially arranged through the through type isolation column. By utilizing the invention, the problems of large gap between the inner electrode and the outer electrode, weaker ion signals and difficulty in guaranteeing the coaxiality of the inner electrode and the outer electrode of the existing cylindrical migration tube can be solved.

Description

technical field [0001] The invention relates to the technical field of ion migration, and more specifically relates to a multi-channel high-field asymmetric waveform ion migration tube. Background technique [0002] The transfer tube is an important part of the high-field asymmetric waveform ion mobility spectrometer. By applying a high-voltage asymmetric waveform on the two electrodes of the migration region in the migration tube, when the electric field strength is greater than 10000V / cm, the ion mobility at this time will also change nonlinearly with the change of the electric field strength. In the case of high electric field (electric field strength greater than 10000V / cm), the relationship between ion mobility and electric field strength is shown in the following formula: [0003] K=K 0 [1+α 1 (E / N) 2 +α 2 (E / N) 4 +···] [0004] In the formula, K is the mobility of ions under high electric field, K 0 is the mobility of ions under low electric field, E is the el...

Claims

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Application Information

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IPC IPC(8): H01J49/06
Inventor 唐飞周金力曾悦王晓浩
Owner TSINGHUA UNIV
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