Preliminary Design of Readout Electronics for CDEX-10 in CJPL

Abstract CDEX (China Dark Matter Experiment) is now upgraded to about 10 kg HPGe (High Purity Germanium) detectors and new dedicated readout electronics is in operation. The readout system is interfaced to the front preamplifiers, which have two “slow” outputs with typical 20 μs shaping time and two “fast” output with typical 200 ns shaping time. 8 channels 14-Bit 100 MSPS FADC and 2 channels 12Bit 2000 MSPS FADC are embedded in the readout 6U prototype board. The RAIN1000Z2 readout module based on ZYNQ SoC is used for readout with Gigabit Ethernet.