Synchronous pulse-based ion transmission method and flight time mass spectrometer

An ion transmission and synchronization pulse technology, applied in the field of ion optics, can solve the problems of affecting the service life of the detector, affecting the ion focusing effect, reducing the detection efficiency, etc., and achieving the effect of reducing the total number of extracted ions, improving the sensitivity, and improving the signal strength.

Inactive Publication Date: 2018-10-12
NORTHWEST INST OF NUCLEAR TECH
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Problems solved by technology

The continuous extraction method has the following disadvantages: 1. If the subsequent ion detection works in the pulse detection mode, a large amount of extracted ions will be wasted and the detection efficiency will be reduced.
2. When there are too many ions in the ion cluster, the space charge effect will affect the focusing effect of the ions
3. A large number of non-concerned ions reach the detector, which affects the service life of the detector

Method used

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  • Synchronous pulse-based ion transmission method and flight time mass spectrometer
  • Synchronous pulse-based ion transmission method and flight time mass spectrometer
  • Synchronous pulse-based ion transmission method and flight time mass spectrometer

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0029] The present invention is based on the design idea of ​​precise ball passing, and uses a pulse extraction field to extract and accelerate ions in a region to form a moving ion cluster. When the ion cluster passes through the second pulse electric field region, an appropriate time is selected Applying the second pulsed electric field causes the target ions to change their running direction and realize the extraction of ions, such as figure 1 shown.

[0030] In the above process, the discrimination effect of the pulsed electric field and the accelerating electric field on the ion mass-to-charge ratio can also be used to promote the separation of ions with different mass-to-charge ratios during the acceleration process; adjust the synchronization time difference between the second pulsed electric field and the first pulsed electric field , ...

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Abstract

The invention belongs to an ion optical technology, and particularly relates to a synchronous pulse-based ion transmission method and a flight time mass spectrometer. On the basis of accurate ball passing idea, the factor that ions in a region are led out and accelerated by a pulse leading-out field to form a moving ion cluster is creatively proposed, appropriate time is selected and a second pulse electric field is applied when ion crowd passes through the second pulse electric field region, the problems of focusing and detection of background ion pairs during pulse leading-out are solved, the synchronous pulse-based ion transmission method and the flight time mass spectrometer can be applied to a scientific instrument relevant to ion motion, and a remarkable effect of improving ion utilization efficiency is achieved.

Description

technical field [0001] The invention belongs to the ion optics technology, and specifically relates to an ion transmission method based on synchronous pulses and a time-of-flight mass spectrometer based on the method, which can be applied to scientific instruments related to ion motion. Background technique [0002] The working mode of the ion source can be divided into continuous type and pulse type. Most of the ion sources work continuously. A large number of ions are continuously generated in the ion source. Under the influence of inertial thinking, most of them adopt the continuous extraction method. The continuous extraction method has the following disadvantages: 1. If the subsequent ion detection works in the pulse detection mode, a large amount of extracted ions will be wasted and the detection efficiency will be reduced. 2. When there are too many ions in the ion cluster, the space charge effect will affect the focusing effect of the ions. 3. A large number of non-...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/06H01J49/40
CPCH01J49/062H01J49/40
Inventor 韦冠一李志明翟利华袁祥龙邓虎沈小攀徐江王文亮
Owner NORTHWEST INST OF NUCLEAR TECH
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