Electrostatic lens device used for electron acceleration

Abstract

An electrostatic lens device used for electron acceleration comprises an electrode plate with an aperture plate, a repelling electrode plate, an accelerating electrode plate and a grounding electrode plate. The device can be used for acceleration of electrons in the desorption process of a photoelectron imaging system. The device is simple in circuit structure design and good in stability and has important effect for distinguishing accelerating and imaging energy of photoelectron imaging electrons.

Description

technical field [0001] The invention belongs to the field of photoelectron imaging, and in particular relates to a device for accelerating electrons in a photoelectron imaging desorption region. Background technique [0002] Imaging technology has a wide range of applications in the field of chemical reaction kinetics, mainly including photolysis fragment ion imaging, reaction product imaging and negative ion photoelectron imaging. In the development of imaging technology, the technology of electrostatic lens has promoted the widespread use of imaging technology. Due to the introduction of "Wiley-McLaren" dual-field acceleration in time-of-flight mass spectrometry to realize the form of spatial focusing, many studies were inspired by this spatial focusing technology and introduced this technology into the research of imaging accelerated electrons. The traditional device uses three electrode sheets, two of which are with grids, which will largely distort the flight trajector...

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Problems solved by technology

But the front of the repeller is still affected by the electric field

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