中国散裂中子源（CSNS）作为国家重大科技基础设施，对探索前沿科学问题、攻克产业“卡脖子”核心技术具有重要意义。CSNS正在规划新建7台用户谱仪，其中有5台谱仪将采用大面积3He管阵列探测器，对3He管读出电子学在分辨率、计数率、信噪比等方面都提出了高要求。针对这些挑战，以前期的研究工作为基础，本项目提出基于探测器信号直接采样和全数字化处理的读出电子学方案。采用电流前放消除电荷平衡效应的影响，结合数字化电荷积分和基线恢复，提高位置分辨和线性度。结合脉冲波形甄别技术提高3He管的n/γ甄别比，实现堆积信号的判弃，保证系统在高计数率下的信噪比。软硬件结合充分采用低功耗设计技术，降低电子学系统功耗。研究真空下元器件的散热机制以及辅助散热措施，为进一步实现电子学在真空下工作打下重要基础。本项目的研究成果，将为CSNS后续谱仪的建设提供重要保障，也可以用于国内其他中子散射装置，具有广泛的应用前景。

China Spallation Neutron Source (CSNS), as a large research infrastructure, is of great significance for China to explore cutting-edge scientific issues and solve the key technologies of the industry. CSNS is planning to build seven user spectrometers, five of which will use large-area 3He tube array detectors. These spectrometers place high demands on 3He tube readout electronics in terms of position resolution, counting rate, and signal-to-noise ratio. In response to these technical challenges, this project proposes a readout electronics solution based on direct sampling and full digital processing of detector signals. Current preamplifier will be used to eliminate the charge equalization effect. Combined with digital charge integration and baseline recovery, position resolution and linearity will be improved. Improvement on the n/γ discrimination and pileup rejection are realized with pulse shape discrimination, which ensures the signal-to-noise ratio at high counting rate. Using low-power design techniques both in hardware and software to reduce power consumption of the electronics. Heat dissipation mechanism under vacuum will be systematically studied, laying an important foundation for the realization of electronics working under vacuum. The research results of this project will provide important guarantee for the construction of new spectrometers in CSNS. It can also be used in other domestic neutron scattering facilities and has broad application prospects.