Spectral analysis system

Abstract

A spectrum analysis system, comprising a Czerny-Turner optical path structure (10), a photomultiplier array (20) which comprises N photomultipliers, an optical fibre array (30), a multi-channel time gating counter (40), a high-voltage power supply (50), and a temperature control module (60) which is connected to the photomultiplier array (20) and used for making same keep in a constant low temperature environment during spectrum measurement, wherein the optical fibre array (30) comprises N groups of optical fibres. The first ends of each group of optical fibres are arranged into one column parallel to the direction of an incident slit (11), installed on a focusing plane of the Czerny-Turner optical path structure (10) and used for collecting monochromatic light with different wavelengths, and the second ends of the N groups of optical fibres are connected to the N photomultipliers in a mode of one-to-one correspondence so as to conduct light signals with different wavelengths to different photomultipliers, N being a positive integer. The system has the advantage of having high sensitivity and high time resolving power at the same time, and can be used for collecting weak, rapidly changing and non-repetitive spectrum signals.

Description

technical field [0001] The invention belongs to the field of analysis instruments, and in particular relates to a spectrum analysis system. Background technique [0002] The spectrometer is a general-purpose spectral analysis instrument, which is widely used in research fields such as plasma physics and atomic and molecular physics. Taking the study of low-temperature plasma physics as an example, the most basic way to understand the behavior of various particles in plasma is to measure the emission lines of various particles. The emission spectrum of low-temperature plasma contains many atomic and molecular spectral lines, and is distributed in a wide wavelength range from ultraviolet to infrared. At the same time, for a plasma in a non-steady state, its emission spectrum changes with time, and may be non-periodic and non-repeating. In order to understand the complex physical and chemical processes in plasma, it is usually necessary to collect many weak spectral lines in ...

AI Technical Summary

Problems solved by technology

Limited by factors such as the photocathode material and the luminous efficiency of the fluorescent plate, the detection efficiency of the enhanced CCD camera is lower than that of the photomultiplier tube

At the same time, although the exposure time of the enhanced CCD camera can reach the nanosecond level, it cannot continuously collect signals due to factors such as signal accumulation, CCD charge transfer speed, and analog-to-digital conversion speed. It must accumulate signals in multiple cycles, so the acquisition efficiency is low. Low and requires that the optical signal must be periodically repeated, and cannot be used for the measurement of transient non-repetitive optical signals

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