Now showing items 1-20 of 47

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

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ...

(2000)
Article
Open Access
• #### Dynamics and mission design near libration points, advanced methods for triangular points ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ﻿

(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 ...

(2001)
Article
Open Access