Control device for low-background alpha-beta measuring instrument

Abstract

The invention relates to a control device for a low-background alpha-beta measuring instrument. The device comprises a nuclear pulse pretreatment unit, an FPGA (Field Programmable Gate Array) / CPLD (Complex Programmable Logic Device)-based master control calculation unit, a communication interface unit and a high voltage and threshold control unit; the FPGA / CPLD-based master control calculation unit is respectively connected with the nuclear pulse pretreatment unit, the communication interface unit and the high voltage and threshold control unit; and high voltage and threshold control unit is connected with the nuclear pulse pretreatment unit. The control device has various characteristics such as parallel and high-speed treatment, real-time synchronous treatment on multipath signals, convenience in expansion, high integration level, capability of reducing the amount of peripheral chips and enhancing the stability and the like.

Description

technical field [0001] The invention relates to a control device, in particular to a control device for a low-background αβ measuring instrument. Background technique [0002] In the field of nuclear detection technology, the detector can convert the energy of the radiation (particle beam) into a fast electronic signal through the interaction with the working medium (such as generating photons or electrons, etc.), and then preprocessed by the front-end electronics part. Including pre-amplification, filter shaping, screening or sampling, converting into digital signals, and then sending them to the controller part (CPU or MCU) for calculation, analysis or recording. The controller part usually also needs to communicate with the host computer, interactive instructions and data, followed by threshold or sampling control of the discriminator and high voltage control of the detector. [0003] In the traditional low-background α, β measuring instrument of this type, the circu...

AI Technical Summary

Problems solved by technology

Under the principle of serial operation, the microcontroller will have greater limitations, resulting in the loss of more measurement events

Moreover, the peripheral gate circuit and trigger circuit need to be added according to the increase of the number of channels, so that the circuit does not have scalability, and the use of more separate electronic devices increases the overall failure rate of the instrument, reducing the overall stability and reliability

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