Development of DAQ system for the acquisition of neutrino bursts from core collapse supernovae in a DUNE far detector

The main goal of the DUNE experiment is to perform an ultimate study of neutrino oscillations over long distances and to search for CP violation in the neutrino sector. The experiment, containing about 40 kton of liquid argon, has also excellent sensitivity to detect neutrinos from astrophysical sources such as neutrino bursts from core collapse supernova (SNa). This additional physics goal introduces challenging aspects in the DUNE data acquisition/trigger system, which should be able of detecting neutrinos from a Supernova burst over a time window of the order of 10 seconds and dealing with a very large dataflow. This work is contributing to study possible solutions for the design of the basic elements of the data acquisition back-end system, capable of dealing with the requirements related to the SNa trigger and interfacing with the front-end system developed at IP2I for a DUNE far detector module. In more details, its aim is to reduce the overall dataflow from this module in real time while not missing any potentially interesting physics event. To realize these real time treatments, FPGA boards with network interfaces have been used. Two main studies were performed during this thesis: - Online compression right after the channel digitization and online decompression in order to be able to do other treatments on the raw data before them being stored. - Online search for trigger primitives, which are indicators of activity inside the detector and the first steps for the definition of the SNa trigger. The manuscript includes all the results obtained and details them in 6 chapters. (author)