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Molecular photodissociation ionization velocity imaging device

A speed imaging and photodissociation technology, which is applied in the direction of measuring devices, analytical materials, fluorescence/phosphorescence, etc., can solve the problems of low slice precision and blurred images, so as to avoid image blurring and improve precision and accuracy , the effect of improving time resolution

Inactive Publication Date: 2010-01-13
EAST CHINA NORMAL UNIV
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Problems solved by technology

The disadvantage of this method is that it is difficult to obtain a high-voltage pulse with a fast rising edge, so the accuracy of the slice cannot be very high, and it will make the image blurred

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  • Molecular photodissociation ionization velocity imaging device
  • Molecular photodissociation ionization velocity imaging device
  • Molecular photodissociation ionization velocity imaging device

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with accompanying drawing:

[0029] refer to figure 1 , in the figure: 1 is the inert gas carrier gas source, 2 is the pressure reducing valve, 3 is the first carrier gas tube, 4 is the sample cell, 5 is the second carrier gas tube, 6 is the vacuum chamber, 7 is the fore-stage dry pump, 8 is a molecular pump, 9 is a pulse valve, 10 is a colander, 11 is a first plate, 12 is a second plate, 13 is a third plate, 14 is a fourth plate, 15 is a drift plate group, 16 is a microchannel plate, 17 is a fluorescent plate, 18 is a pulse power supply, 19 is a first high voltage DC power supply, 20 is a second high voltage DC power supply, 21 is a third high voltage DC power supply, 22 is a CCD camera, 23 is a computer, 24 For laser, 25 is a two-dimensional adjustment disc.

[0030] refer to figure 2 , in the figure: 11 is the first pole plate, 12 is the second pole plate, 13 is the third pole plate, 14 is the f...

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Abstract

The invention discloses a molecular photodissociation ionization velocity imaging device and relates to a device which uses the ion velocity imaging technology for carrying out slicing and imaging on positive and negative ions and electronic three-dimensional information. The device comprises an inert gas carrier gas source, a pressure reducing valve, a sample cell, a vacuum cavity, a pre-stage dry pump, a molecular pump, a pulse valve, a skimmer, an ion lens group, a micro-channel plate, a fluorescent plate, a CCD camera, a computer and a synchronized laser source. The device designs an ion lens in the traditional ion velocity imaging system to the multi-stage ion lenses and combines the micro-channel plate with rapid response, the fluorescent plate and the enhanced CCD camera with ultra-high time resolution, thereby greatly extending an ion cloud on time scale, leading the ion slicing and imaging precision to achieve 5ns, improving the time resolution, solving the problem of image blur and reducing the cost.

Description

technical field [0001] The invention belongs to the field of molecular reaction dynamics, and relates to slice imaging of three-dimensional information of positive and negative ions and electrons by ion velocity imaging technology, in particular to a molecular photodissociation ionization velocity imaging device. Background technique [0002] Molecular photolysis dynamics is an important field of molecular reaction dynamics. Photolysis dynamics not only studies the interaction between single molecule and laser, but also is an important means to control the chemical reaction of bimolecules and even multi-molecular systems. In recent years, for the preparation of a selected internal energy state, obtaining a specific reaction product or selecting a specific reaction channel has become a hot spot and focus of molecular reaction dynamics. Therefore, to measure the quantum state of related photolysis products or photolysis fragments, Especially its angular distribution and veloc...

Claims

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Application Information

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IPC IPC(8): G01N21/84G01N21/64
Inventor 杨岩孙真荣张诗按张晖樊露露孙盛芝邓莉孙金煜
Owner EAST CHINA NORMAL UNIV
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