Research On Key Technologies Of Universal Readout Electronics In Particle Physics Experimental Device

In several years,with the high speed development of particle physics experimental techniques,it is necessary to bombard atomic nuclei with ions accelerated to various energies to study nuclear structure and motion changes.Generally speaking,particle physics experimental devices involve the use of detectors to convert the physical information of particles into electrical signals,and extract,convert,transmit and summarize the signals through front-end electronics and supporting data transmission systems,as an indispensable part of particle experiments.In addition,particle physics experiments are becoming more and more energetic,and the scale of the detector is getting larger and larger,so that the amount of data generated by the experiment is also increasing.At the same time,it is also requested that the experimental data can be extracted,converted,transmitted and recorded in time during the particle experiment.As a result,the design method of traditional electronics readout system is under great challenge,and the detector readout system in the future is bound to develop towards the tendency of large scale,high density and high speed.In order to meet the demand of large-scale data transmission in particle physics experiments,this paper investigates the critical technology of a general-purpose readout electronics composed of data transmission system based on Micro TCA architecture and front-end readout card to make the data transmission system between them can correctly and stably transmit high-speed data,so that the system can be applied in diverse particle physics experimental devices.The front-end readout card can be applied to particle physics experimental tests,and it measures the charge information of the effective current pulse signal output from the detector by using the Charge Amplitude Conversion method.What’s more,the back-end data acquisition system is a data transmission system based on the Micro TCA architecture,and the self-developed AMC signal processing card can receive and cache the data packaged and uploaded by the front-end readout board,and finally transmit it to the X86data summarization subsystem for evaluation and processing.Eventually,through various tests,it is proved that the readout electronics system composed of the front-end readout board and the back-end data acquisition system can communicate correctly and operate stably,and the optical fiber BER of the link transmission is extremely low,far below1×10^-14,and the transmission speed of the link is also close to the theoretical extreme value,reaching 430MB/s.Finally,through the integral nonlinearity test of the front-end readout board and the ⁶⁰Co gamma radiation source,it is demonstrated that the system can meet the demand of high-speed transmission of large-scale data amount in particle physics experiments.