12 research outputs found

    The large aperture gamma ray observatory as an observational alternative at high altitude

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    To appear in Conference Title (2007). Rev Mex AA(SC)A pesar de que las observaciones por sat√©lite han permitido desvelar algunos misterios sobre el origen y localizaci√≥n de rayos c√≥smicos a bajas energ√≠as, hay preguntas a√ļn no resueltas en los rangos mas altos de energ√≠as (> 1 GeV). El ujo de part√≠culas a altas energ√≠as es muy bajo, necesitando de grandes √°reas de medici√≥n, por lo que la detecci√≥n de part√≠culas secundarias en observatorios sobre la super cie terrestre representa una soluci√≥n viable. Aunque el Observatorio Pierre Auger tiene esa capacidad, dados sus 16:000m2 de detectores, su baja altura sobre el nivel del mar reduce en gran medida su capacidad de detecci√≥n. El proyecto LAGO es una alternativa de observaci√≥n aceptable, que intenta superar √©sta limitaci√≥n. Este proyecto iniciado en el 2005, sit√ļa detectores Cherenkov de agua a gran altura. Los sitios de observaci on han sido seleccionados siguiendo algunos requisitos b√°sicos, a saber: altitud, infraestructura acad√©mica y t√©cnica, existencia de un grupo de investigaci√≥n responsable del montaje y mantenimiento de los detectores as√≠ como de la visualizaci√≥n, an√°lisis, divulgaci√≥n y preservaci√≥n de los datos. Este art√≠culo presenta el estado general de los observatorios de Sierra Negra-M√©xico, Chacaltaya-Bol√≠via, Marcapomacocha-Per√ļ, M√©rida-Venezuela y [email protected] satellite observations have revelaedsome mysteries about the origin and location of cosmic rays at low energies, questions remain to be resolved in higher energy ranges (> 1 GeV). However, the ow of particles at high energies is very low, large sensitive areas are necessary, so that the detection of secondary particles from observatories on the surface of the earth is a technically viable solution. While the Pierre Auger Observatory has such capacity given its 16000 m2 of detectors, low height above sea level greatly reduces its detection capability. The Large Aperture Gamma Ray Observatory (LAGO) is an observational alternative that attempts to overcome this limitation. This project was started in 2005, placing water Cherenkov Detectors at high altitude. Observation sites have been selected with some basic requirements: altitude, academic and technical infrastructure, existence of a research group responsible for assembly and maintenance of the detectors and the analysis, visualization, divulgation and data storage. This paper presents the general status of the observatories of Sierra Negra-M√©xico, Chacaltaya-Bol√≠via, Marcapomacocha-Per√ļ, M√©rida-Venezuela and Bucaramanga-Colombi

    The DUNE Far Detector Vertical Drift Technology, Technical Design Report

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    International audienceDUNE is an international experiment dedicated to addressing some of the questions at the forefront of particle physics and astrophysics, including the mystifying preponderance of matter over antimatter in the early universe. The dual-site experiment will employ an intense neutrino beam focused on a near and a far detector as it aims to determine the neutrino mass hierarchy and to make high-precision measurements of the PMNS matrix parameters, including the CP-violating phase. It will also stand ready to observe 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 implements liquid argon time-projection chamber (LArTPC) technology, and combines the many tens-of-kiloton fiducial mass necessary for rare event searches with the sub-centimeter spatial resolution required to image those events with high precision. The addition of a photon detection system enhances physics capabilities for all DUNE physics drivers and opens prospects for further physics explorations. Given its size, the far detector will be implemented as a set of modules, with LArTPC designs that differ from one another as newer technologies arise. In the vertical drift LArTPC design, a horizontal cathode bisects the detector, creating two stacked drift volumes in which ionization charges drift towards anodes at either the top or bottom. The anodes are composed of perforated PCB layers with conductive strips, enabling reconstruction in 3D. Light-trap-style photon detection modules are placed both on the cryostat's side walls and on the central cathode where they are optically powered. This Technical Design Report describes in detail the technical implementations of each subsystem of this LArTPC that, together with the other far detector modules and the near detector, will enable DUNE to achieve its physics goals

    The DUNE Far Detector Vertical Drift Technology, Technical Design Report

    No full text
    International audienceDUNE is an international experiment dedicated to addressing some of the questions at the forefront of particle physics and astrophysics, including the mystifying preponderance of matter over antimatter in the early universe. The dual-site experiment will employ an intense neutrino beam focused on a near and a far detector as it aims to determine the neutrino mass hierarchy and to make high-precision measurements of the PMNS matrix parameters, including the CP-violating phase. It will also stand ready to observe 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 implements liquid argon time-projection chamber (LArTPC) technology, and combines the many tens-of-kiloton fiducial mass necessary for rare event searches with the sub-centimeter spatial resolution required to image those events with high precision. The addition of a photon detection system enhances physics capabilities for all DUNE physics drivers and opens prospects for further physics explorations. Given its size, the far detector will be implemented as a set of modules, with LArTPC designs that differ from one another as newer technologies arise. In the vertical drift LArTPC design, a horizontal cathode bisects the detector, creating two stacked drift volumes in which ionization charges drift towards anodes at either the top or bottom. The anodes are composed of perforated PCB layers with conductive strips, enabling reconstruction in 3D. Light-trap-style photon detection modules are placed both on the cryostat's side walls and on the central cathode where they are optically powered. This Technical Design Report describes in detail the technical implementations of each subsystem of this LArTPC that, together with the other far detector modules and the near detector, will enable DUNE to achieve its physics goals

    The DUNE Far Detector Vertical Drift Technology, Technical Design Report