Ion beam fluorescence detection device and method for 4pi solid angle

Abstract

The invention discloses an ion beam fluorescence detection device with a 4pi solid angle. The ion beam fluorescence detection device comprises a laser system, an elliptical mirror, a light collector, a photomultiplier, a grating spectrometer, a vacuum displacement table and a computer system, a beam line opening is formed in the focus of the lower portion of the elliptical mirror, the upper portion of an upper opening of the elliptical mirror is communicated with a lower inlet of the light collector, the grating spectrometer or the photomultiplier is arranged at the position of an upper outlet of the light collector, and the grating spectrometer is connected with the photomultiplier through the vacuum displacement table. And the grating spectrometer and the photomultiplier are respectively connected with a computer. According to the invention, an elliptical mirror is combined with a light collector technology, so that efficient collection and detection of an atom (or ion) beam fluorescence spectrum within a certain range are realized. The large solid angle reflection characteristic of the elliptical mirror is combined with the angle selection characteristic of the light collector, so that the solid angle of fluorescence spectrum collection of the to-be-detected system can be effectively and greatly increased. Compared with traditional small solid angle detection, the collection efficiency can be improved by more than 20 times.

Description

technical field [0001] The invention belongs to the technical field of fluorescence detection, in particular to a 4π solid angle ion beam fluorescence detection device and method. Background technique [0002] Fluorescence detection is widely used in the analysis and detection of various samples, and has a wide range of applications in the detection of inorganic substances, organic substances, atoms, and molecules. It has the advantages of rapid testing, convenient operation, good repeatability, high resolution, and low sample limitation. It has become an indispensable means of analysis and detection in the fields of physics, chemistry, and biology. Usually, fluorescence spectrum measurement adopts a double-lens focusing scheme. The basic principle is to collect and detect fluorescence within a limited solid angle based on the refraction and focusing of light in the lens. It is a detection method that collects photons in a limited solid angle. [0003] For the measurement o...

AI Technical Summary

Problems solved by technology

At the same time, the number of photons emitted by atoms, molecules or ions with low enrichment is extremely small. Most of the existing fluorescence spectrum measurement methods are small solid angle detection, and it is difficult to realize the rapid measurement of a small amount of photon emission.

In particular, in a beamline device with a very low ion yield, the fluorescence spectrum emitted by the interaction between the laser and the beamline is very weak. The traditional dual-lens focusing measurement method is limited by the detection solid angle, and the fluorescence spectrum will be annihilated by noise.

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