18 research outputs found

    Estudo do efeito da contaminação na luz de cintilação do argÎnio líquido no experimento ProtoDUNE-SP

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    Orientador: Ettore SegretoDissertação (mestrado) - Universidade Estadual de Campinas, Instituto de FĂ­sica Gleb WataghinResumo: DUNE Ă© um dos experimentos mais importantes na ĂĄrea de fĂ­sica de neutrinos que pretende estudar questĂ”es em aberto sobre neutrinos, neutrinos de supernovas e decaimento do prĂłton. O experimento ProtoDUNE-SP Ă© um protĂłtipo de grande escala do experimento DUNE instalado no CERN que vem tomando dados desde setembro de 2018. Ambos os experimentos, DUNE e ProtoDUNE-SP, utilizam a tĂ©cnica experimental de detecção Liquid Argon Time Projection Chamber (LArTPC). O estudo do presente trabalho teve como foco a estimativa do comprimento de espalhamento Rayleigh no experimento ProtoDUNE-SP. A anĂĄlise dos dados indica um comprimento de espalhamento Rayleigh de aproximadamente 97−15+25_{-15}^{+25}\,cm, que coincide com o valor estimado analiticamenteAbstract: DUNE is one of the most important experiments in the field of neutrino physics aiming to study open questions about neutrinos, supernova neutrinos, and proton decay. The experiment ProtoDUNE-SP is the large-scale prototype of the DUNE experiment. ProtoDUNE-SP is installed at CERN and it has been taking data since September 2018. The experimental detection technique used in both DUNE and ProtoDUNE-SP experiments is the Liquid Argon Time Projection Chamber (LArTPC). The study of the present work focused on estimating the Rayleigh scattering length in the ProtoDUNE-SP experiment. The analysis of the data indicates a Rayleigh scattering length of approximately 97−15+25_{-15}^{+25}\,cm, which coincides with the analytically estimated valueMestradoFisica AplicadaMestra em FĂ­sica132440/2017-2CNP

    Deep Underground Neutrino Experiment (DUNE), Far Detector Technical Design Report, Volume I Introduction to DUNE

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    International audienceThe preponderance of matter over antimatter in the early universe, the dynamics of the supernovae that produced the heavy elements necessary for life, and whether protons eventually decay—these mysteries at the forefront of particle physics and astrophysics are key to understanding the early evolution of our universe, its current state, and its eventual fate. The Deep Underground Neutrino Experiment (DUNE) is an international world-class experiment dedicated to addressing these questions as it searches for leptonic charge-parity symmetry violation, stands ready to capture supernova neutrino bursts, and seeks to observe nucleon decay as a signature of a grand unified theory underlying the standard model. The DUNE far detector technical design report (TDR) describes the DUNE physics program and the technical designs of the single- and dual-phase DUNE liquid argon TPC far detector modules. This TDR is intended to justify the technical choices for the far detector that flow down from the high-level physics goals through requirements at all levels of the Project. Volume I contains an executive summary that introduces the DUNE science program, the far detector and the strategy for its modular designs, and the organization and management of the Project. The remainder of Volume I provides more detail on the science program that drives the choice of detector technologies and on the technologies themselves. It also introduces the designs for the DUNE near detector and the DUNE computing model, for which DUNE is planning design reports. Volume II of this TDR describes DUNE's physics program in detail. Volume III describes the technical coordination required for the far detector design, construction, installation, and integration, and its organizational structure. Volume IV describes the single-phase far detector technology. A planned Volume V will describe the dual-phase technology

    Deep Underground Neutrino Experiment (DUNE), Far Detector Technical Design Report, Volume II: DUNE Physics

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    The preponderance of matter over antimatter in the early universe, the dynamics of the supernovae that produced the heavy elements necessary for life, and whether protons eventually decay -- these mysteries at the forefront of particle physics and astrophysics are key to understanding the early evolution of our universe, its current state, and its eventual fate. DUNE is an international world-class experiment dedicated to addressing these questions as it searches for leptonic charge-parity symmetry violation, stands ready to capture supernova neutrino bursts, and seeks to observe nucleon decay as a signature of a grand unified theory underlying the standard model. The DUNE far detector technical design report (TDR) describes the DUNE physics program and the technical designs of the single- and dual-phase DUNE liquid argon TPC far detector modules. Volume II of this TDR, DUNE Physics, describes the array of identified scientific opportunities and key goals. Crucially, we also report our best current understanding of the capability of DUNE to realize these goals, along with the detailed arguments and investigations on which this understanding is based. This TDR volume documents the scientific basis underlying the conception and design of the LBNF/DUNE experimental configurations. As a result, the description of DUNE's experimental capabilities constitutes the bulk of the document. Key linkages between requirements for successful execution of the physics program and primary specifications of the experimental configurations are drawn and summarized. This document also serves a wider purpose as a statement on the scientific potential of DUNE as a central component within a global program of frontier theoretical and experimental particle physics research. Thus, the presentation also aims to serve as a resource for the particle physics community at large

    Highly-parallelized simulation of a pixelated LArTPC on a GPU

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    The rapid development of general-purpose computing on graphics processing units (GPGPU) is allowing the implementation of highly-parallelized Monte Carlo simulation chains for particle physics experiments. This technique is particularly suitable for the simulation of a pixelated charge readout for time projection chambers, given the large number of channels that this technology employs. Here we present the first implementation of a full microphysical simulator of a liquid argon time projection chamber (LArTPC) equipped with light readout and pixelated charge readout, developed for the DUNE Near Detector. The software is implemented with an end-to-end set of GPU-optimized algorithms. The algorithms have been written in Python and translated into CUDA kernels using Numba, a just-in-time compiler for a subset of Python and NumPy instructions. The GPU implementation achieves a speed up of four orders of magnitude compared with the equivalent CPU version. The simulation of the current induced on 10310^3 pixels takes around 1 ms on the GPU, compared with approximately 10 s on the CPU. The results of the simulation are compared against data from a pixel-readout LArTPC prototype

    Highly-parallelized simulation of a pixelated LArTPC on a GPU