Concept of KamLAND2 DAQ system

The KamLAND-Zen experiment is searching for neutrinoless double-beta decay of 136 Xe. We are preparing the upgrade KamLAND detector, KamLAND2. It designed to improve discrimination power two-neutrino and cosmic-ray muon spallation backgrounds. Data acquisition all neutrino events from nearby supernova also an important issue KamLAND2 data rate a key factor design new DAQ system. High speed sampling will be realized with RFSoC on front-end electronics. read out FEE computers via 10 GbE, FairMQ one candidates software. In DAQ, whole trigger system implemented in hardware, while adopts hardware photon detection software extract physics events. A simulation study proceeding order detect low energy using timing charge information.