FERMILAB-PUB-21-067-E-LBNF-PPD-SCD-T This document was prepared by the DUNE collaboration using the resources of the Fermi National Accelerator Laboratory (Fermilab), a U.S. Department of Energy, Office of Science, HEP User Facility. Fermilab is managed by Fermi Research Alliance, LLC (FRA), acting under Contract No. DE-AC02-07CH11359. This work was supported by CNPq, FAPERJ, FAPEG and FAPESP, Brazil; CFI, IPP and NSERC, Canada; CERN; MŠMT, Czech Republic; ERDF, H2020-EU and MSCA, European Union; CNRS/IN2P3 and CEA, France; INFN, Italy; FCT, Portugal; NRF, South Korea; CAM, Fundación “La Caixa”, MICINN, GVA, Xunta de Galicia and AEI, Spain; SERI and SNSF, Switzerland; TÜBİTAK, Turkey; The Royal Society and UKRI/STFC, United Kingdom; DOE and NSF, United States of America. This research used resources of the National Energy Research Scientific Computing Center (NERSC), a U.S. Department of Energy Office of Science User Facility operated under Contract No. DE-AC02-05CH11231.This work was supported by CNPq, FAPERJ, FAPEG and FAPESP, Brazil; CFI, IPP and NSERC, Canada; CERN; MŠMT, Czech Republic; ERDF, H2020-EU and MSCA, European Union; CNRS/IN2P3 and CEA, France; INFN, Italy; FCT, Portugal; NRF, South Korea; CAM, Fundación “La Caixa”, MICINN, GVA, Xunta de Galicia and AEI, Spain; SERI and SNSF, Switzerland; TÜBİTAK, Turkey; The Royal Society and UKRI/STFC, United Kingdom; DOE and NSF, United States of America.The Deep Underground Neutrino Experiment (DUNE) is an international, world-class
experiment aimed at exploring fundamental questions about the universe that are at the forefront
of astrophysics and particle physics research. DUNE will study questions pertaining to the preponderance of matter over antimatter in the early universe, the dynamics of supernovae, the subtleties
of neutrino interaction physics, and a number of beyond the Standard Model topics accessible in a
powerful neutrino beam. A critical component of the DUNE physics program involves the study
of changes in a powerful beam of neutrinos, i.e., neutrino oscillations, as the neutrinos propagate a
long distance. The experiment consists of a near detector, sited close to the source of the beam, and
a far detector, sited along the beam at a large distance. This document, the DUNE Near Detector
Conceptual Design Report (CDR), describes the design of the DUNE near detector and the science
program that drives the design and technology choices. The goals and requirements underlying the
design, along with projected performance are given. It serves as a starting point for a more detailed
design that will be described in future documents.Fermi Research Alliance, LLC
DE-AC02-07CH11359H2020-EUTÜBİTAKNational Science FoundationU.S. Department of Energy
DE-AC02-05CH11231Multiple Sclerosis Center of AtlantaCERNUK Research and InnovationNatural Sciences and Engineering Research Council of CanadaScience and Technology Facilities CouncilRoyal SocietyEuropean CommissionSingapore Eye Research InstituteSchweizerischer Nationalfonds zur Förderung der Wissenschaftlichen ForschungFundação de Amparo à Pesquisa do Estado de São PauloMinisterstvo Školství, Mládeže a TělovýchovyFundação para a Ciência e a TecnologiaGeneralitat ValencianaConselho Nacional de Desenvolvimento Científico e TecnológicoNational Research Foundation of KoreaInstituto Nazionale di Fisica NucleareFundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de JaneiroCentre National de la Recherche ScientifiqueMinisterio de Ciencia e InnovaciónFundação de Amparo à Pesquisa do Estado de GoiásCommissariat à l'Énergie Atomique et aux Énergies AlternativesEuropean Regional Development FundXunta de GaliciaAgencia Estatal de InvestigaciónInstitut National de Physique Nucléaire et de Physique des Particule
