Today’s large-scale science projects have always encountered challenges in processing large data flow from the experiments, the ATLAS detector records proton-proton collisions provided by the Large Hadron Collider (LHC) at CERN every 50 ns which results in a total data flow of 10 Pb/s. These data must be reduced to the science data product for further analysis, thus a very fast decisions need t...

Abstract The ReadOut System (ROS) is a central part of the data acquisition (DAQ) system ATLAS Experiment at CERN Large Hadron Collider (LHC). responsible for receiving and buffering event from all detector subsystems serving these to High Level Trigger (HLT) via 10 GbE network, discarding or transporting onward once trigger has completed its selection process. ROS was completely replaced durin...

Abstract We have investigated a prototype triggerless data acquisition (DAQ) system for charmed-baryon spectroscopy at J-PARC. A special time-to-digital converter (TDC) dedicated to continuous timing measurement without any external trigger was developed. high dynamic range of the order 1010 realized by introducing heartbeat method, which periodically generates delimiter datum. DAQ software rec...