Spectrum analysis system

Abstract

The invention discloses a spectrum analysis system which comprises a Czerny-Turner light path structure, a photomultiplier tube array, an optical fiber array, a multi-channel time gating counter, a high-voltage power supply and a temperature controlling module. The photomultiplier tube array includes N photomultiplier tubes, wherein N is a positive integer. The optical fiber array comprises N sets of optical fibers, and the first end of each set of optical fibers form a column in the direction parallel to an entrance slit and installed on the focusing plane of the Czerny-Turner light path structure, wherein the first end of each set of optical fibers collects monochromatic light of different wave lengths, and the second ends of the N sets of optical fibers are correspondingly connected with the N photomultiplier tubes in a one-to-one mode so that light signals of different wave lengths can be conducted to different photomultiplier tubes. The temperature controlling module is connected with the photomultiplier tube array and used for keeping the photomultiplier tube array in a constant low-temperature environment in the process of spectral measurement. The spectrum analysis system has the advantages of having high sensitivity and high time resolution and being capable of being used for collecting weak fast-changing non-redundant 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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