Now showing items 1-20 of 47

  • 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, ...
  • 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 ...
  • 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, ...
  • Horseshoe periodic orbits for saturn coorbital satellites 

    Llibre Saló, Jaume; Ollé Torner, Mercè (2000)
    Article
    Open Access
    We consider the motion of coorbital satellites in the framework of the Restricted Three-Body problem for u=6.5*10^(-9). We show a mechanism to generate horsehoe periodic orbits and we compute some families of horseshoe ...
  • Horseshoe periodic orbits in the restricted three body problem 

    Llibre Saló, Jaume; Ollé Torner, Mercè (2001)
    Article
    Open Access