Abstract
The DAQ system of ProtoDUNE-SP successfully proved its design principles and met the requirements of the beam run of 2018. The technical design of the DAQ system for the DUNE experiment has major differences compared to the prototype due to different requirements placed on the detector, as well as a radically different location of operation. The single-phase prototype at CERN is a major integration facility for R&D aspects of the DUNE DAQ system. The facility allows for the exploration of additional data processing capabilities and optimization of the FELIX system, which is the chosen TPC readout solution for the DUNE single-phase detectors. One of the fundamental differences from the prototype is that the DUNE DAQ relies on self-triggering. Therefore, real-time processing of the data stream for hit and trigger primitive finding is essential for the requirement of continuous readout. The supernova burst trigger requires a large and fast buffering technique, where 3D XPoint persistent memory solutions are evaluated and integrated. In order to maximize resource utilization of the FELIX hosting servers, the elimination of the 100 Gb network communication stack is desired. This implies the design and development of a single-host application layer, which is a fundamental element of the self-triggering chain. This paper discusses the evaluation and integration of these developments for the DUNE DAQ, in the ProtoDUNE environment.
Highlights
The Deep Underground Neutrino Experiment (DUNE)[1] is a leading-edge international experiment with a varied physics program including neutrino oscillation, proton decay and supernova studies
The DUNE Far Detector consists of four liquid-argon Time Projection Chamber (LAr-TPC) super-modules located 1.5 km underground in shielded caverns, excavated in the former Homestake gold mine
Ionization tracks are collected by the wires of the detector’s six Anode Plane Assemblies (APAs), which amount to 4% of the 150 APAs of a DUNE super-module
Summary
The Deep Underground Neutrino Experiment (DUNE)[1] is a leading-edge international experiment with a varied physics program including neutrino oscillation, proton decay and supernova studies. The DUNE Far Detector consists of four liquid-argon Time Projection Chamber (LAr-TPC) super-modules located 1.5 km underground in shielded caverns, excavated in the former Homestake gold mine. Each super-module has internal dimensions of 14 m x 14 m x 62 m, holding 17,000 tons of liquid argon at -186 ◦C. The active volume is 6 m high, 7 m wide, and 7.2 m deep (along the drift direction). It was filled with 750 tons of LAr and received a charged particle beam from the Super Proton Synchrotron (SPS). The DAQ system design differs fundamentally between ProtoDUNE and DUNE due to the environment of the detectors, the triggering principles, and the constraints of the readout units of the TPC. This paper discusses R&D on the TPC readout solution and the integration of these features into the ProtoDUNE-SP environment
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