Speaker
Description
TRopIcal DEep-sea Neutrino Telescope (TRIDENT) will use large-area silicon photomultiplier (SiPM) arrays in the hybrid Digital Optical Module (hDOM) to improve the single-photon time resolution of Cherenkov radiation detection, achieving better angular resolution.
We present the design of the SiPM array readout electronics.
The front-end circuit consists of SiPM arrays in a series-parallel connection with differential output, and an analog multi-channel summing circuit to combine these outputs into a single channel. We then construct an $8\times 8$ SiPM array (2.4cm $\times$ 2.4cm) into one readout channel, reducing the need for multiple readout channels.
The front-end signal is discriminated by a comparator and then digitized by an FPGA-based time-to-digital converter (TDC).
The overall system's single-photon time resolution (SPTR) achieves 600ps FWHM, with a power consumption of about 220mW per channel.
