Cascaded double-exponential nuclear pulse signal generating device and control method thereof

Abstract

The invention discloses a cascaded double-exponential nuclear pulse signal generating device and a control method thereof. The cascaded double-exponential nuclear pulse signal generating device can becompatible with nuclear pulse signals output by different types of detectors. The device takes a CPU, an FPGA and a high-speed digital-to-analog conversion chip as cores, and comprises a current-to-voltage conversion module, a baseline bias adjustment module, a signal amplitude adjustment module, a high-frequency filter network and an output drive enhancement module. The control method of the device comprises the steps that a CPU receives relevant parameters from a PC or a handheld terminal, cascaded double-exponential nuclear pulse signals are generated according to an algorithm formula, anFPGA controls a high-speed digital-to-analog conversion chip DAC to generate double-exponential nuclear pulse signals with different pulse amplitudes and widths, the pulse leading edge integral time constant and the trailing edge differential time constant are adjustable, and a single or periodic nuclear pulse signal may be generated. The device is especially suitable for nuclear radiation signalmeasurement, test, calibration, calibration and the like under the condition of no actual radionuclide source.

Description

technical field [0001] The invention relates to a pulse signal generating device, in particular to a cascaded double-exponential nuclear pulse signal generating device and a control method thereof. Background technique [0002] In the process of modern physical experiments and related scientific research and instrument development, it is usually necessary to convert the rays emitted by standard radionuclide sources into electrical pulse signals through a ray detector, and then use electronic methods to study and process them. The information carried in the radioactive source and detector is obtained from these pulse signals as undistorted as possible. Standard radioactive sources are increasingly used in scientific research and production. Considering the strong radiation of the radioactive source itself, long-term exposure will cause different degrees of radiation damage to relevant personnel. At the same time, each radiation protection The preparation work is time-consumi...

AI Technical Summary

Problems solved by technology

Regarding the technical research on the imitation nuclear pulse signal generator, many people at home and abroad have made constructive exploration and practice, but they mostly focus on the Gaussian characteristics of the large-scale nuclear pulse signal in the amplitude distribution and the time distribution. Negative exponential characteristics, there are few studies on the characteristics of a single pulse itself, and some literatures simply treat it as a single exponential signal or a double exponential signal with fixed parameter characteristics

Images