Digital multichannel pulse amplitude analyzer suitable for accumulation recovery of X-ray fluorescence multielement analyzer

Abstract

The invention discloses a digital multichannel pulse amplitude analyzer suitable for accumulation recovery of an X-ray fluorescence multielement analyzer. Hardware mainly comprises a high-speed ADC circuit, an FPGA circuit and a DSP circuit. An FPGA controls a high-speed ADC to sample signals of a detector; the sampled digital signals are subjected to pulse shaping in an FPGA to form a fast channel and a slow channel, respectively; the fast channel, formed by relatively narrow pulses, is used for extracting time information of the signals of the detector; and the slow channel, formed by the relatively wide pulses, is used for extracting amplitude information of the signals of the detector. The shaped pulses are subjected to accumulation judgment in the FPGA; the pulses which are not accumulated are subjected to amplitude judgment in the FPGA; energy spectrum data are formed and stored in the FPGA; for the accumulated pulses, the time information and pulse data are transmitted to a DSPby the FPGA; the pulses accumulated together are subjected to accumulation recovery operation in the DSP to form an energy spectrum of the accumulated pulses; and finally the energy spectrum in the FPGA and the energy spectrum in the DSP are added together to form the energy spectrum of pulse accumulation recovery. The digital multichannel pulse amplitude analyzer can improve energy spectrum counting rate and energy resolution during X-ray fluorescence analysis.

Description

technical field [0001] The invention relates to a random pulse multi-channel amplitude analyzer for pulse accumulation recovery, in particular to a multi-channel pulse amplitude analyzer for X-ray detector signal energy spectrum acquisition. Background technique [0002] In the production process of metallurgy, non-ferrous metals, mining, building materials and many other fields in our country, the ratio of each element in the raw material plays a key role in the quality of the product. At present, the in-flow X-ray fluorescence multi-element analysis instrument based on the patented technology "In-flow detection multi-element analysis device and method" (Patent No.: 200710010105.5) has realized the real-time detection of the content of each component element in the material flow, and got rid of the The cumbersome procedure of chemical analysis after manual sampling greatly improves production efficiency. [0003] The circuit for obtaining the X-ray energy spectrum in this ...

AI Technical Summary

Problems solved by technology

Due to the influence of pulse accumulation, increasing the dose of radioactive sources will lead to an increase in the dead time, and the increase in the count rate of the energy spectrum is limited. Moreover, increasing the dose of radioactive sources is not conducive to the management of radioactive sources and the protection of radioactive safety.

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