328 research outputs found

    Status of the HIE-ISOLDE project at CERN

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    The HIE-ISOLDE project represents a major upgrade of the ISOLDE nuclear facility with a mandate to significantly improve the quality and increase the intensity and energy of radioactive nuclear beams produced at CERN. The project will expand the experimental nuclear physics programme at ISOLDE by focusing on an upgrade of the existing Radioactive ion beam EXperiment (REX) linac with a 40 MV superconducting linac comprising thirty-two niobium-on-copper sputter-coated quarter-wave resonators housed in six cryomodules. The new linac will raise the energy of post-accelerated beams from 3 MeV/u to over 10 MeV/u. The upgrade will be staged to first deliver beam energies of 5.5 MeV/u using two high-β\beta cryomodules placed downstream of REX, before the energy variable section of the existing linac is replaced with two low-β\beta cryomodules and two additional high-β\beta cryomodules are installed to attain over 10 MeV/u with full energy variability above 0.45 MeV/u. An overview of the project including a status summary of the different R&D activities and the schedule will outlined.Comment: 7 pages, 12 figures, submitted to the Heavy Ion Accelerator Technology conference (HIAT) 2012, in Chicag

    Momentum scale calibration of the LHCb spectrometer

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    For accurate determination of particle masses accurate knowledge of the momentum scale of the detectors is crucial. The procedure used to calibrate the momentum scale of the LHCb spectrometer is described and illustrated using the performance obtained with an integrated luminosity of 1.6 fb-1 collected during 2016 in pp running. The procedure uses large samples of J/ψ → μ+μ- and B+ → J/ψK+ decays and leads to a relative accuracy of 3 × 10-4 on the momentum scale

    Porno-pensamientos sobre la pornografía gay de los años setenta y ochenta

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    Orgías, descontrol, promiscuidad, liberación, subversión, disidencia, cuerpos, saliva, sudor, líquidos corporales. Y podemos seguir. Palabras que pueden (o no) referirnos a representaciones vinculadas a lo pornográfico, a miradas explícitas sobre los cuerpos y el contacto sexual. La pornografía es algo muy com piejo. Es un lenguaje, un objeto, una categoría, algo que inquieta a conservadores y progresistas (posiciones pro-porno, anti-porno, feminismos, religiones, etc., se han peleado por la pornografía en un sentido amplio). No es un tema sencillo del que escribir. Es algo que tiene una complejidad que nos hace pensaren múltiples perspectivas. Vamos a intentar meternos en algunas vetas de esa complejidad para pensarlas representaciones de la pornografía en los textos culturales.Documento incorporado en 2019 en el marco del "Programa de becas de experiencia laboral" de la Biblioteca Profesor Guillermo Obiols para estudiantes de Bibliotecología, a partir de un procedimiento técnico de captura de datos desarrollado por el personal del IdIHCS.Facultad de Humanidades y Ciencias de la Educació

    Porno-pensamientos sobre la pornografía gay de los años setenta y ochenta

    Get PDF
    Orgías, descontrol, promiscuidad, liberación, subversión, disidencia, cuerpos, saliva, sudor, líquidos corporales. Y podemos seguir. Palabras que pueden (o no) referirnos a representaciones vinculadas a lo pornográfico, a miradas explícitas sobre los cuerpos y el contacto sexual. La pornografía es algo muy com piejo. Es un lenguaje, un objeto, una categoría, algo que inquieta a conservadores y progresistas (posiciones pro-porno, anti-porno, feminismos, religiones, etc., se han peleado por la pornografía en un sentido amplio). No es un tema sencillo del que escribir. Es algo que tiene una complejidad que nos hace pensaren múltiples perspectivas. Vamos a intentar meternos en algunas vetas de esa complejidad para pensarlas representaciones de la pornografía en los textos culturales.Documento incorporado en 2019 en el marco del "Programa de becas de experiencia laboral" de la Biblioteca Profesor Guillermo Obiols para estudiantes de Bibliotecología, a partir de un procedimiento técnico de captura de datos desarrollado por el personal del IdIHCS.Facultad de Humanidades y Ciencias de la Educació

    Momentum scale calibration of the LHCb spectrometer

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    For accurate determination of particle masses accurate knowledge of the momentum scale of the detectors is crucial. The procedure used to calibrate the momentum scale of the LHCb spectrometer is described and illustrated using the performance obtained with an integrated luminosity of 1.6 fb-1 collected during 2016 in pp running. The procedure uses large samples of J/ψ → μ+μ- and B+ → J/ψK+ decays and leads to a relative accuracy of 3 × 10-4 on the momentum scale

    Design and optimisation of the Compact Linear Collider main LINAC module for micron-level stability and alignment

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    The Compact Linear Collider (CLIC) study is developing a Multi-TeV e+e- linear collider. An acceleration gradient of 100 MV m-1will be achieved in the Main LINACs using 11.994 GHz Super Accelerating Structures (SAS). To achieve the required luminosity, the SAS will be prealigned within modules to less than 14 mu m and maintain their position to within 1.4 mu m when exposed to local sources of mechanical noise. A module design is presented and Finite Element Analysis (FEA) is used to optimise the harmonic frequencies of this module and thereby minimise the potential impact of unknown sources of vibration. A module with a fundamental frequency of 60 Hz is presented. Historical ground noise data from the LHC at CERN is used to statistically quantify the magnitude of SAS misalignments unavoidably induced by local ground noise. The one-standard -deviation average vertical misalignment due to ground noise is less than 0.044 mu m above 0.1 Hz for all SAS.Peer reviewe

    Performance of the LHCb muon system with cosmic rays

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    The LHCb Muon system performance is presented using cosmic ray events collected in 2009. These events allowed to test and optimize the detector configuration before the LHC start. The space and time alignment and the measurement of chamber efficiency, time resolution and cluster size are described in detail. The results are in agreement with the expected detector performance.Comment: Submitted to JINST and accepte
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