Nuclear impulse processing circuit

Abstract

The invention relates to the technical field of nuclear radiation detection and provides a nuclear impulse processing circuit. The nuclear impulse processing circuit comprises an amplifying circuit, a peak-holding circuit, a high-speed AD conversion circuit, a digital signal processor, a threshold identifying circuit and a sampling trigger circuit. The input end of the amplifying circuit is connected with nuclear impulse signals. The output end of the amplifying circuit is connected with the peak-holding circuit. The output end of the peak-holding circuit is connected with the digital signal processor through the high-speed AD conversion circuit. The output end of the digital signal processor is connected with the amplifying circuit. The input end of the threshold identifying circuit is connected with the nuclear impulse signals. The output end of the threshold identifying circuit is connected with the high-speed AD conversion circuit through the sampling trigger circuit. By the adoption of the nuclear impulse processing circuit, the amplification factor of nuclear impulses can be adjusted on line through software on the digital signal processor; moreover, adjustment has linear characteristics, and the adjusting accuracy is improved.

Description

technical field [0001] The invention relates to the technical field of nuclear radiation detection, in particular to a nuclear pulse processing circuit. Background technique [0002] In the process of nuclide analysis and identification, the first thing that needs to be done is to process the pulse signal output by the nuclear detector, so as to extract its energy, number and other information to form an energy spectrum, and then perform nuclide analysis on the energy spectrum. [0003] The processing of nuclear pulse signals is usually done by analog circuits, and general nuclear pulse acquisition and processing circuits can only process nuclear pulse signals with certain energies and pulse widths, and do not have universal adaptability. Therefore, configuring some circuits in the analog circuit by a digital processor to adjust the performance of the analog circuit can effectively overcome the above problems, making the nuclear pulse processing circuit more flexible and abl...

AI Technical Summary

Problems solved by technology

However, due to the non-linear relationship between the magnification of the variable gain amplifier and the written parameters, the adjustment accuracy of the magnification is poor, which cannot meet the needs of high-precision nuclide analysis.

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