The Design Of Front-end Readout Electronics Based On Advanced ASIC VATA160

With the continuous development of science and technology,the experimental platform required by various nuclear physics experiments has been established,which provides the necessary conditions for the development of nuclear physics experiments.Detectors used in nuclear physics experiments have also developed rapidly with the increasing scale of nuclear physics experiments.Now,there are a wide variety of types of detectors,which scales gradually increasing as well as the channels and density of detection units improved a lot.In order to exhibit good performances in collecting the signals output by the detector,new requirements are put forward for the readout electronics system connected to the detector.Aiming at the readout requirements of nuclear physics experiments,this research introduces a front-end readout electronics system with high integration,multi-channel,low power consumption,high data transmission rate.Its performances compatible with the requirements of the scalability and versatility of the readout electronics system.This front-end readout electronics system realizes the transmission and acquisition of the input signal according to the readout requirements,which is used to guarantee the analysis and processing of the subsequent data of nuclear physics experiments.The readout electronics system is mainly designed based on the ASIC and the FPGA,VATA160 chip is a chip that IDEAS Company upgraded and improved VA32.The VATA160 charge measurement special integrated circuit is used to process the input signal,and the logic control unit transmits the collected data to the upper computer for storage and analysis.The main content includes: front-end readout electronics system hardware structure,control logic design,main module simulation,host computer design,performance test,and joint debugging test with the detector.In order to verify the reliability of the front-end readout electronics system design,the performance of the readout electronics system was tested.After testing,the baseline noise value only accounts for 0.02% of the range of the entire readout electronics system,and the noise interference is small;the integral nonlinearity of the channel is better than 0.80%;At the same time,the crosstalk between channels of the readout electronics system is small,Excellent long-term work stability.The joint debugging with the detector shows that the readout electronics system can successfully read the electrical signals generated by the particles emitted by the Sr-90 radioactive source hitting the plastic scintillation detector.Finally,the front-end readout electronics system is summarized and prospected.The system has a large dynamic range and integration level,and has a strong versatility.It has a wide range of adaptability for the research and development of a variety of nuclear physics experiments in the future.At the same time,the modular design prepares for the next upgrade.