Nuclear detection simulation device based on nanosecond light source and nuclear signal inversion technology

Abstract

The invention discloses a nuclear detection simulation device based on a nanosecond light source and a nuclear signal inversion technology. The nuclear detection simulation device comprises an upper computer, a ZYNQ SoC processor, a synchronous clock, a DDR3, an SD card (TF-CARD), an LCD display screen and a simulation nuclear pulse signal output channel. An electronic circuit and a nuclear pulse current signal are used for driving a blue light LED to emit a nuclear pulse light signal, and a scintillator is simulated to receive gamma radiation for luminescence; moreover, a point source, a surface source, an organic scintillator detector, an inorganic scintillator, scintillation efficiency, detection efficiency, a radioactive source, fast components, slow components, multi-type nuclear pulse signals, a nuclear pulse statistical fluctuation phenomenon, an electron pair effect, a Compton effect, a photoelectric effect and radiation of the scintillator can be simulated, a corresponding energy spectrum curve is generated, and pulse signal accumulation is otuput; generation of a spectral line and output of an environment background spectral line are simulated; and 3D visual operation is achieved, and the nuclear signal detection process can be demonstrated in an animation mode. Therefore, the device can be used as professional test equipment and also can be used as a teaching instrument.

Description

technical field [0001] The invention belongs to the technical field of nuclear pulse energy spectrometers, and in particular relates to a nuclear detection simulation device and nuclear signal inversion technology based on a nanosecond light source. Background technique [0002] The nuclear pulse spectrometer can be used in system development, teaching experiments in the nuclear field, teaching experiments in radioactive related fields, etc. If you buy radioactive sources and detectors directly, because the radioactive sources have strong radioactivity, they will produce ionizing radiation and threaten human life. Therefore, certain radiation protection measures must be taken during the experimental teaching process, which will increase A large amount of capital costs and reduces the teaching effect. In order to address the above problems, it is necessary to develop a nuclear pulse generator system. [0003] At present, there are generally two methods of mainstream nuclear...

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Problems solved by technology

[0003]The current mainstream nuclear signal generator generally has two methods: the first one: FPGA generates a series of random nuclear pulse numbers whose amplitude conforms to the Gaussian distribution according to the mathematical algorithm signal, DAC converts the digital signal into an analog nuclear pulse signal, such an implementation method algorithm design is very complicated and inefficient

The second is to use ARM instead of FPGA to realize the output of nuclear pulse signal, and the obvious disadvantage of this method is that the operation speed is very low, and the demand for high bandwidth output cannot be realized.

[0004] Moreover, the use of the nuclear pulse signal generator is quite cumbersome, and it can be used only through quite complicated parameter settings, so it is extremely unfriendly to non-professionals

And the traditional nuclear pulse signal generator has a single function, only as a signal generating unit

There are certain thresholds for the existence of teaching experiments

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