DAQ architecture design of Daya Bay Reactor Neutrino Experiment

The main task of the data acquisition (DAQ) system in Daya Bay Reactor Neutrino Experiment is to record antineutrino candidate events and other background events. There are seventeen detectors in three sites. Each detector will have a separate VME readout crate that contains the trigger and DAQ electronics modules. The DAQ system reads event data from front end electronics modules, concatenates data fragments of the modules and packs them to a subsystem event, then transmits to the backend system to do data stream merging, monitoring and recording.