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Digital Multiplex Coincidence Measuring Device for Radioactive Xenon

A technology of radioactive and measuring chambers, which is applied in the field of radioactive gas analysis, can solve the problems of research and manufacturers that have not been reported in the literature, and achieve the effect of reducing environmental background interference, reducing complexity, and enhancing anti-interference ability

Active Publication Date: 2021-09-24
63653 FORCES PLA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The comparative analysis of the literature shows that there are no literature reports on the research and production of the device with the same structure as the invention in China

Method used

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  • Digital Multiplex Coincidence Measuring Device for Radioactive Xenon
  • Digital Multiplex Coincidence Measuring Device for Radioactive Xenon
  • Digital Multiplex Coincidence Measuring Device for Radioactive Xenon

Examples

Experimental program
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Effect test

Embodiment Construction

[0012] according to figure 1 Connect the various functional modules, first vacuum the radioactive xenon measurement chamber, then introduce the radioactive xenon gas of the sample to be tested into the measurement chamber through the push-in connector, after the sample injection is completed, close the valve to keep the measurement chamber sealed; Si-PIN detector, PIPS detector, front-end circuit, high-speed ADC and FPGA power supply, run for a period of time (about 1min) to stabilize the system; finally, open the host computer software, set parameters such as time / amplitude window, and start the measurement. The measurement duration depends on the statistical fluctuation of the coincidence count for the nuclide of interest. Close the system after the measurement, and calculate the activity concentration of radioactive xenon isotope according to the formula (1).

[0013]

[0014] In the formula, N ci —Concern the coincidence count of nuclide i energy region;

[0015] lam...

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Abstract

The invention relates to the field of radioactive gas analysis, which is a digital multi-channel coinciding device for measuring radioactive xenon, including a Si-PIN detector, a PIPS detector, a closed gas measurement chamber, a preamplifier, a front-end circuit, and a high-speed digital pulse collector (ADC) , High-performance field programmable logic gate array (FPGA), STM32 single-chip microcomputer (MCU), PC, energy spectrum data processing host computer software, SPI bus, CAN bus, USB and other components. The invention can realize the coincidence measurement of radioactive xenon isotope CE-X cascade events, and has the function of reducing environmental background interference.

Description

technical field [0001] The invention relates to the field of radioactive gas analysis and meets the requirements of a radioactive xenon isotope measurement system with high sensitivity, small volume and light weight. Background technique [0002] Radioactive xenon isotope monitoring technology can be directly and effectively used in the field of nuclear activity and radiation safety monitoring, and is of great significance for the determination of the nature of suspicious nuclear test events, the assessment of the radioactive environment around nuclear facilities, and nuclear emergency monitoring. [0003] The measurement of radioactive xenon isotope can choose proportional counter, liquid scintillation spectrometer, HPGe gamma spectrometer or beta-gamma coincidence measurement system, etc. Among them, proportional counters and liquid scintillation spectrometers can only measure total β, and it is difficult to analyze radioactive xenon isotopes. The HPGeγ spectrometer and t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01T1/36G01T1/172G01T1/16G05B19/042
CPCG01T1/1603G01T1/172G01T1/361G01T1/365G05B19/0421G05B19/0423G05B2219/21137G05B2219/2214G05B2219/25032
Inventor 不公告发明人
Owner 63653 FORCES PLA
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