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A tripole velocity imager for detecting electrons, ions and neutral radicals

A technology of ion velocity imaging and electron velocity imaging, which is applied in electron/ion optical devices, particle separation tubes, parts of particle separator tubes, etc., and can solve problems such as inability to achieve detection

Active Publication Date: 2019-01-18
NANJING UNIV OF INFORMATION SCI & TECH
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  • Abstract
  • Description
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Problems solved by technology

However, when light interacts with matter, not only charged particles (ions and electrons) are produced, but also a large number of free radical fragments and neutral particles. The speed of these neutral fragments cannot be detected by existing technologies.

Method used

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  • A tripole velocity imager for detecting electrons, ions and neutral radicals
  • A tripole velocity imager for detecting electrons, ions and neutral radicals
  • A tripole velocity imager for detecting electrons, ions and neutral radicals

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Embodiment Construction

[0026] The present invention is described in further detail now in conjunction with accompanying drawing.

[0027] Such as figure 1 As shown, the three-pole velocity imager for detecting electrons, ions and neutral free radicals is characterized in that it includes a main cavity 21, a neutral free radical fragment velocity imaging flight tube 13, an ion velocity imaging flight tube 11, an electron velocity imaging Flight tube 12, laser generator 22 and optical path channel 24;

[0028] One end of the main cavity 21 is inlaid with an annular electron gun sampling device 1, and the other end is provided with a neutral free radical fragment velocity imaging flight tube 13, and a laser beam action area 4 is provided in the main cavity 21. A sample injection aperture 3 is arranged between the annular electron gun sampling device 1 and the laser beam action area 4, an electronic lens 2 is arranged between the annular electron gun sampling device 1 and the sample injection aperture ...

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Abstract

A tripole velocity imager for detecting electrons, ions and neutral free radicals is characterized in that the tripole velocity imager comprises a main cavity, a neutral free radical fragment velocityimaging flight tube, an ion velocity imaging flight tube, an electron velocity imaging flight tube, a laser generator and an optical path. An annular electron gun injection device, a neutral free radical fragment velocity imaging flight tube, an ion velocity imaging flight tube, and an electron velocity imaging flight tube are arranged in the main cavity, and an electron lens and an imaging device are arranged in the electron velocity imaging flight tube. The device can separate the ions electrons and neutral free radical fragments produced by the interaction of light and matter and collect the velocity distribution of the ions electrons and neutral free radical fragments to provide complete data for the study of photodynamics.

Description

technical field [0001] The invention relates to the technical field of photoelectric detection, in particular to a triple-pole velocity imager for detecting electrons, ions and neutral free radicals. Background technique [0002] The idea of ​​using ion velocity imaging technology to study the spatial distribution of chemical reactions or photolysis products can be traced back to a kind of photolysis image described by J. Solomon and R. Bersohn of Columbia University more than 30 years ago. mapping) method. The ion imaging technology developed in the late 1980s projected the three-dimensional photolysis scattering process onto a two-dimensional plane for imaging, and then reconstructed its three-dimensional spatial intensity distribution through mathematical transformation methods, realizing the use of two-dimensional images. Provides information on velocity in three-dimensional space. This technology is based on the time-of-flight mass spectrometer (TOFMS) device, improve...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J49/40H01J49/06
CPCH01J49/06H01J49/067H01J49/40
Inventor 颜逸辉刘玉柱刘博蒋怡尹文怡丁鹏飞
Owner NANJING UNIV OF INFORMATION SCI & TECH
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