Waveform digitizers are key readout instruments in particle physics experiments. In this paper, we present a waveform digitizer for the PandaX dark matter experiments. It supports both external-trigger readout and triggerless readout, accommodating the needs of low rate full-waveform readout and channel-independent low threshold acquisition, respectively. This digitizer is a 8-channel VME board with a sampling rate of 500 MS/s and 14-bit resolution for each channel. A digitizer system consisting of 72 channels has been tested in situ of the PandaX-4T experiment. We report the system performance with real data.
@article{arxiv.2108.11804,
title = {A 500 MS/s waveform digitizer for PandaX dark matter experiments},
author = {Changda He and Jianglai Liu and Xiangxiang Ren and Xiaofeng Shang and Xikai Wei and Mingxin Wang and Jijun Yang and Jinqun Yang and Yong Yang and Guangping Zhang and Qibin Zheng},
journal= {arXiv preprint arXiv:2108.11804},
year = {2021}
}