A command system and control method for Doppler broadening spectrum measurement

Abstract

The invention relates to nuclear electronics technology, in particular to an instruction system and control method for Doppler broadening spectrum measurement, the system includes a programmable amplifier, high-speed ADC, FPGA digital pulse analysis system and host computer; FPGA digital pulse The analysis system includes an instruction set and a controller for executing instructions, a dual-channel filtering and amplitude extraction module connected to the controller, a Gigabit Ethernet sending module, a parameter pool, a data buffer, a sending selector, and a Gigabit Ethernet receiving module. Modules and Instructions Validation Modules. The control of the system guides the controller to complete the control function of the entire FPGA digital pulse analysis system through instructions, replacing the single-chip microcomputer, and at the same time eliminating the bottleneck of the communication rate, so that the FPGA digital pulse analysis system can send various data to the host computer at the same time. Do not interfere with each other. The controller can also receive instructions from the host computer to make real-time and flexible adjustments to any parameters that need to be modified.

Description

technical field [0001] The invention belongs to the technical field of nuclear electronics, and particularly relates to an instruction system and a control method used for Doppler-broadened spectrum measurement. Background technique [0002] In a nuclear radiation detection system, the energy of the radiating particles is converted into an electrical signal in the sensitive volume of the detection material, and the amplitude of the electrical signal pulse is proportional to the energy absorbed by the particle. In the Doppler broadening detection system, it is necessary to analyze the energy information of the two channels at the same time and make statistics on them. The current common practice is to use a hardware (analog / digital) circuit to filter and extract the amplitude of the pulse signal output by the detection material. For the Doppler broadening system, time calibration is also required. Then, the amplitude value carrying the time information is sent to the upper c...

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Problems solved by technology

However, in this approach, due to the low-speed communication rate between the microcontroller and the FPGA, it is difficult for the host computer to obtain the digitized radiation pulse and the filtered waveform; at the same time, it is difficult to transmit data to the host computer at the same time Internally coordinate and transmit multiple data without interfering with each other

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