Speaker
Description
The China Spallation Neutron Source (CSNS) is currently upgrading to CSNS-II, increasing the proton beam power to 500 kW and constructing several new neutron spectrometers. The CSNS-II upgrade poses significant challenges for detector and electronics systems, including higher counting rate, improved position resolution requirement, and vacuum operating environment. In this paper, we present an ultra-low-power front-end readout electronics prototype designed for ³He tube detectors in CSNS-II spectrometers. The circuit design, FPGA algorithms, and laboratory test results of the prototype will be discussed. Experimental results demonstrate that the new electronics system can achieve a single-tube counting rate of 100K/s while maintaining a position resolution better than 8 mm. Test also confirmed the system's capability to operate under vacuum conditions. These results meet the requirements for neutron signal readout in CSNS-II spectrometers.