Preliminary Design on the Wide Dynamic and Fast Response Electronic System for the 4H-SiC PIN Fast Neutron Detector

Based on the measured dynamic range of fast neutron injection rate, 4H-SiC PIN detector fast neutron detection efficiency and detector output current signal distribution characteristics, this paper designs and develops a current sensitive front-end readout circuit based on a high bandwidth transimpedance amplifier (ADI LTC6268-10), analyzes the main factors affecting the front-end circuit characteristics, and explores the main methods to improve the linear range of the front-end circuit. The main methods to improve the linear range of the front-end circuit are explored. Second, according to the front-end circuit output signal characteristics, based on high-bandwidth ADC (AD9680) and Zynq UltraScale+ MPSoC XCZU15EG development board, a digital data acquisition system (DAQ) was designed and developed. The preliminary simulation and experimental test results show that the designed detector electronics circuit has a good linear response under the conditions of input current pulse frequency of 20MHz, peak value of 10μA∼100μA and pulse width of 5ns. The research results provide relevant technical support for the establishment of 4H-SiC detector electronics system.