Research and design of the electronics system for the underground dark matter detection experiment in IHEP

The underground dark matter experiment in IHEP searches for direct detection of dark matter using CsI(Na) as detector material. Rare nuclear recoil events of dark matter particles scattering off the target material will be detected by photomultiplier tubes (PMTs). This paper describes the electronics system structure we chose for this detector. It focuses on the design of the main modules, the high-speed ADC module and the 2-level data acquisition module. Some performance results are presented at the end.