Multichannel digital spectrometer with function of spectrum stabilization

Abstract

The invention relates to the technical field of nuclear radiation detection and provides a multichannel digital spectrometer with a function of spectrum stabilization. The multichannel digital spectrometer comprises a front end analog circuit, a high speed and high precision analog to digital converter (ADC) circuit, a high-speed field programmable gate array (FPGA) circuit and a communication module, wherein the front end analog circuit, the high speed and high precision ADC circuit, the FPGA circuit and the communication module are serially connected with one another, a nuclear pulse signal enters the spectrometer from the front end analog circuit and enters the ADC circuit after signal conditioning, the ADC circuit completes digital conversion of an analog signal, subsequently, the signal enters the FPGA circuit to be subjected to digital signal processing, and a processing result is transmitted to a computer through the communication module. The FPGA circuit provides a gain control signal to the front end analog circuit according to the calculation result and receives a comparative result of a high-speed comparator in the front end analog circuit. According to the multichannel digital spectrometer with the function of spectrum stabilization, a brand new front end analog circuit design and a high speed and high precision ADC are used, the processing speed of the digital spectrometer is greatly increased, the multichannel digital spectrometer can be simultaneously connected with at most four energy spectrum type detectors, and the application range is more wide.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a digital spectrometer for nuclear pulse signals in the back-end electronics of a nuclear radiation detection device. Background technique [0002] In the field of nuclear radiation detection technology, energy spectrum measurement is a key measurement technology. Since ray energy spectrum contains rich nuclide information, users can use this information to distinguish nuclide types and determine the content of various nuclides. Spectroscopy is increasingly used in a variety of radiation monitoring applications. In actual use, energy spectrum measurement is realized by various types of energy spectrum instruments, and the functions and performance indicators of these instruments directly determine the quality of the measured energy spectrum. [0003] At present, the spectrometer devices used at home and abroad are still mostly analog multi-channel spectromete...

AI Technical Summary

Problems solved by technology

Due to the slow response, it is difficult for this type of spectrometer to handle nuclear pulse signals with high count rates, and it is also difficult to implement various complex filters in it due to the limitation of analog circuits

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