Now showing items 1-20 of 53

    • A method to stabilise the performance of negatively fed KM3NeT photomultipliers 

      Adrian Martinez, Silvia; Ageron, M.; Aiello, S; Albert, A.; Ameli, F; Anassontzis, E.G.; André, Michel; et al., . (2016-12-19)
      Article
      Open Access
      The KM3NeT research infrastructure, currently under construction in the Mediterranean Sea, will host neutrino telescopes for the identification of neutrino sources in the Universe and for studies of the neutrino mass ...
    • A search for neutrino emission from the Fermi bubbles with the ANTARES telescope 

      Adrian Martinez, Silvia; Albert, A.; Al Samarai, Imen; André, Michel; Anton, G.; Anvar, S.; Ardid, M.; Astraatmadja, T.; Baret, B.; Basa, S.; Bertin, V.; Biagi, S.; Bogazzi, C.; Bouhou, B.; Brunner, J.; Morganti, M.; Schmidt, J.; Stolarczyk, Th. (2014-02-06)
      Article
      Open Access
      Analysis of the Fermi-LAT data has revealed two extended structures above and below the Galactic Centre emitting gamma rays with a hard spectrum, the so-called Fermi bubbles. Hadronic models attempting to explain the origin ...
    • Cálculo de blindaje para una puerta de acceso a un bunker de irradiación con neutrones de 800 MeV y espectro cósmico 

      Mancisidor Uranga, Maite (Universitat Politècnica de Catalunya, 2014-06)
      Master thesis (pre-Bologna period)
      Restricted access - author's decision
      La radiación cósmica puede inducir alteraciones en el funcionamiento de los dispositivos electrónicos. En los dispositivos de la instrumentación electrónica de la industria aeroespacial son muy frecuentes las perturbaciones ...
    • Central configurations of the planar coorbital satellite problem 

      Cors Iglesias, Josep Maria; Llibre Saló, Jaume; Ollé Torner, Mercè (2003)
      Article
      Open Access
      We study the planar central configurations of the 1 + n body problem where one mass is large and the other n masses are infinitesimal and equal. We find analytically all these central configurations when 2 ≤ n ≤ 4. Numerically, ...
    • Characterisation of the Hamamatsu photomultipliers for the KM3NeT Neutrino Telescope 

      Aiello, S; Ameli, F; André, Michel; Anghinolfi, Marco; Anton, G.; Ardid Ramírez, Miguel; Avgitas, T.; Bertin, V.; Bormuth, R.; Bouwhuis, M.C.; Puricelli, Stefano; Cherubini, Silvio; Coniglione, R.; Mannheim, Karl; Morganti, Michele; Pellegrino, Carlo; Piattelli, P.; Real, Del; Santangelo, A; Sharma, Aniruddh; Trovato, A.; Zaborov, D.; Zúñiga Román, Juan (2018-05-01)
      Article
      Open Access
      The Hamamatsu R12199-02 3-inch photomultiplier tube is the photodetector chosen for the first phase of the KM3NeT neutrino telescope. About 7000 photomultipliers have been characterised for dark count rate, timing spread ...
    • Control individual y coordinado de multiples sistemas mecánicos 

      Martínez Díaz, Sonia (2007-12-19)
      Audiovisual
      Open Access
      La aplicación del control automático de sistemas es muy diversa y plantea numerosos retos. Los problemas van desde los aparentemente sencillos, como qué hacer para que un coche pueda aparcarse solo, hasta los mas complicados, ...
    • Dependence of atmospheric muon flux on seawater depth measured with the first KM3NeT detection units The KM3NeT Collaboration 

      Ageron, M.; Aiello, S; Ameli, F; André, Michel; Androulakis, Giorgos; Anghinolfi, Marco; Anton, Gisela; Ardid Ramírez, Miguel; Aublin, J.; Bagatelas, Christos; Barbarino, G.C.; Bertin, Vincent; Bouwhuis, M.C.; Puricelli, Stefano; Chau, Nearkasen; Cherubini, Silvio; Coniglione, R.; D'Amico, Antonio; Fermani, P.; Lamare, P.; Mannheim, Karl; Morganti, Michele; Pellegrino, Carlo; Piattelli, P.; Real, Del; Santangelo, A; Sharma, Aniruddh; Tingay, S. J.; Trovato, A.; Zaborov, D. (springer-Verlag, 2020-02-06)
      Article
      Open Access
      KM3NeT is a research infrastructure located in the Mediterranean Sea, that will consist of two deep-sea Cherenkov neutrino detectors. With one detector (ARCA), the KM3NeT Collaboration aims at identifying and studying ...
    • Discrete nonholonomic LL systems on Lie groups 

      Fedorov, Yuri; Zenkov, Dmitry (2003)
      Article
      Open Access
      This paper applies the recently developed theory of discrete nonholonomic mechanics to the study of discrete nonholonomic left-invariant dynamics on Lie groups. The theory is illustrated with the discrete versions of two ...
    • Disseny d’una galga nuclear per determinar el gruix d’una mostra per retrodispersió de partícules beta 

      Aymerich Soler, Núria (Universitat Politècnica de Catalunya, 2014-06)
      Master thesis (pre-Bologna period)
      Open Access
      L’objectiu d’aquest projecte és dissenyar una galga nuclear capaç de determinar el gruix de pintura epoxi d’una mostra usant el mètode de retrodispersió de partícules beta. En el disseny de la galga s’ha escollit la font ...
    • Dynamics and mission design near libration points, advanced methods for collinear points 

      Gómez, Gerard; Jorba, Angel; Masdemont Soler, Josep; Simó Torres, Carlos (2000)
      Article
      Open Access
      Preface and table of contents of a forthcoming book published by World Scientific
    • Dynamics and mission design near libration points, advanced methods for triangular points 

      Gómez, Gerard; Jorba, Angel; Masdemont Soler, Josep; Simó Torres, Carlos (2000)
      Article
      Open Access
      The final objective of this work is to understand, analyze and compute the kinds of motion that appear on a vicinity (may be a large vicinity) of the geometrically defined equilateral points of the Earth-Moon system, as a ...
    • Effective Stability Around Periodic Orbits of the Spatial RTBP 

      Jorba, Angel; Villanueva Castelltort, Jordi (1995)
      Article
      Open Access
      In this work we study the dynamics around an elliptic periodic orbit of Hamiltonian systems. To this end we have developped an algorithm to compute a normal form (up to a finite order) around this orbit, that gives an ...
    • Exponentially small splitting of separatrices under fast quasiperiodic forcing 

      Delshams Valdés, Amadeu; Gelfreich, Vassili; Jorba, Angel; Martínez-Seara Alonso, M. Teresa (1997)
      Article
      Open Access
      We consider fast quasiperiodic perturbations with two frequencies $(1/\varepsilon,\gamma/\varepsilon)$ of a pendulum, where $\gamma$ is the golden mean number. The complete system has a two-dimensional invariant ...
    • Fast Alpha Particle Distribution in the Presence of Anomalous Spatial Particle Diffusion 

      García Carrasco, Álvaro (Universitat Politècnica de Catalunya / Chalmers Tekniska Högskola, 2011)
      Master thesis (pre-Bologna period)
      Open Access
      The high-energy alpha particle population in an ignited D-T fusion plasma may cause thermonuclear wave instabilities, which could lead to anomalous losses of plasma energy and of energetic alpha particles. On the other ...
    • FCC-ee: the Lepton Collider: future circular collider conceptual design report volume 2 

      O'Callaghan Castellà, Juan Manuel (Springer, 2019-06-01)
      Article
      Open Access
      In response to the 2013 Update of the European Strategy for Particle Physics, the Future Circular Collider (FCC) study was launched, as an international collaboration hosted by CERN. This study covers a highest-luminosity ...
    • FCC-hh: the hadron collider: future circular collider conceptual design report volume 3 

      Abada, A.; Abbrescia, M.; AbdusSalam, S. S.; O'Callaghan Castellà, Juan Manuel (Springer, 2019-07-01)
      Article
      Open Access
      In response to the 2013 Update of the European Strategy for Particle Physics (EPPSU), the Future Circular Collider (FCC) study was launched as a world-wide international collaboration hosted by CERN. The FCC study covered ...
    • From quantum quasiparticles to a classical gas 

      Massignan, Pietro Alberto (American Physical Society, 2019-03-06)
      Article
      Open Access
    • GEANT4 simulation of the neutron background of the C6D6 set-up for capture studies at n_TOF 

      Žugec, Petar; Colonna, Nicola; Bosnar, Damir; Calviño Tavares, Francisco; Cortés Rossell, Guillem Pere; Gómez Hornillos, María Belén; Riego Pérez, Albert (2014-05-20)
      Article
      Restricted access - publisher's policy
      The neutron sensitivity of the C6D6 detector setup used at n_TOF facility for capture measurements has been studied by means of detailed GEANT4 simulations. A realistic software replica of the entire n_TOF experimental ...
    • Geometric Hamilton-Jacobi theory for nonholonomic dynamical systems 

      Cariñena, José F.; Gràcia Sabaté, Francesc Xavier; Marmo, Giuseppe; Martínez, Eduardo; Muñoz Lecanda, Miguel Carlos; Román Roy, Narciso (2009-08-14)
      External research report
      Open Access
      The geometric formulation of Hamilton--Jacobi theory for systems with nonholonomic constraints is developed, following the ideas of the authors in previous papers. The relation between the solutions of the Hamilton--Jacobi ...
    • Homoclinic and heteroclinic transfer trajectories between Lyapunov orbits in the Sun-Earth and Earth-Moon systems 

      Canalias Vila, Elisabet; Masdemont Soler, Josep (2004)
      Article
      Open Access
      In this paper a method for finding homoclinic and heteroclinic connections between Lyapunov orbits using invariant manifolds in a given energy surface of the planar restricted circular three body problem is developed. Moreover, ...