Dali Zhang, Jia-Cong Liu, Ya-qing Liu, Xin-Qiao Li, Zheng-Hua An, Chao Zheng, Shaoying Xiong, Xilei Sun, X. Wen, K. Gong, Shuai Yang, Zhiyong Lu, Xiao-jing Liu, Sheng Yang, Xiao-Yun Zhao, Yan-Bin Xu, P. Feng, Cai Shao, Lu Wang, Chenwei Wang, Yan-Qiu Zhang, Wang-Chen Xue, Wenchang Tan, Jin-Peng Zhang, Yue Wang, Min Gao, Jin-zhou Wang, Fan Zhang
Abstract
As a new member (denoted as GECAM-D) of the Gravitational Wave Electromagnetic Counterpart All-sky Monitor (GECAM) constellation, the Gamma-ray Transient Monitor (GTM) on the DRO-A satellite is primarily designed to detect gamma-ray transients from 15 keV to 1 MeV, such as Gamma-Ray Bursts (GRBs), the high energy counterparts of Gravitational Waves (GWs) and Fast Radio Bursts (FRBs), and Soft Gamma-ray Repeaters (SGRs). DRO/GTM can also monitor the solar activities and environmental radiation of the DRO orbit. Although the SiPM-based gamma-ray detector has been successfully employed in GECAM, the issue of SiPM dark noise caused by irradiation needs further improvement. For DRO/GTM, a novel coincidence readout is proposed and implemented for the SiPM-based detector, which reduces dark noise by several orders of magnitude. This paper primarily introduces the design and ground test results.
Citation format
ZHANG, Dali, et al. The coincidence readout of sipm-based detector of DRO/GTM (GECAM-D): Design and ground test. IEEE TRANSACTIONS ON NUCLEAR SCIENCE, 2026.