Development Of Nuclear Energy Spectrum Measurement Device Based On High-speed Data Acquisition Card

With the development of contemporary nuclear science and technology,the application fields of using nuclear technology have also been greatly expanded.In order to avoid various accidents and ensure personnel safety,it is becoming more and more important to monitor the radionuclide in some places involving nuclear technology applications.The requirements and performance of nuclear monitoring instruments are also increasing.The effective collection and processing of nuclear energy spectrum data is an important subject for studying nuclear electronics.In traditional electronics research,we generally use a dedicated multi-channel analyzer and analysis system to collect and process nuclear energy spectra.The traditional multi-channel energy spectrum analyzer has many advantages because of its pertinence.It has good differential nonlinearity and good stability,but it also has its shortcomings and deficiencies.For example,this type of analyzer often consists of large The electronics section is relatively bulky,so it is bulky,and it cannot perform multi-channel energy spectrum measurement at the same time,and the data acquisition rate is not very high.At present,many mature universal data acquisition cards have been developed in the industry in China.They have good versatility,easy use,small size,and high cost performance,and universal data acquisition cards are basically multi-channel inputs.The combination of technology and nuclear technology can greatly improve the performance of the current nuclear spectrometer.In order to solve the above-mentioned situations,a high-speed data acquisition card is used for the high-speed and large-capacity advantages to design a gamma spectrum acquisition processing system based on the PCI-9812 high-speed data acquisition card.It is more simplified in the overall structure of the system,more efficient and convenient in terms of functions,and stable and easy to operate.The main system consists of a detector part,a hardware part and a software part.The detector part consists of a LaBr₃?Ce?scintillator detector and a CZT detector.The hardware part is composed of an amplification and shaping circuit,a peak discrimination holding circuit,and a PCI-9812 high-speed data acquisition card.The upper computer software department of the system uses MATLAB software platform.Functions such as nuclear energy spectrum collection,data storage,energy spectrum data processing,and simplified operation to achieve strong human-computer interaction are realized.Relevant experiments were subsequently carried out.The experimental data were consistent with the decay profiles of the relevant nuclides.The energy linearity and resolution met the design requirements,simplifying the data processing and analysis,the device was stable and reliable,and the monitoring results were good.