Now showing items 1-10 of 10

    • Development of flow regime maps for lead lithium eutectic–helium flows 

      Mas de les Valls Ortiz, Elisabet; Cegielski, Andrzej; Jaros, Mark; Pérez-Ferragut, Marina; Batet Miracle, Lluís; Freixa Terradas, Jordi (2020-09-01)
      Article
      Restricted access - publisher's policy
      nstitute for Plasma Research (IPR), Gandhinagar (India) is currently involved in the design and development of its Lead-Lithium Ceramic Breeder (LLCB) module for testing in the International Thermo-nuclear Experimental ...
    • Diseño conceptual e ingenieria de detalle de un lazo experimental dual Pb15.7Li/ He (proyecto BCN_LOOP®): una propuesta de proyecto de I+D+i industrial para desarrollos clave en tecnologia nuclear de fusion 

      Batet Miracle, Lluís; Reventós Puigjaner, Francesc Josep; Mas de les Valls Ortiz, Elisabet; Fernández, Iván; Veredas, G.; Abellà, Jordi; Sempere Cebrían, Julià; Sanmartí Cardona, Manel; Linares, José Ignacio; Sedano, L.A. (2012)
      Conference report
      Open Access
    • First-principles modeling of three-body interactions in highly compressed solid helium 

      Cazorla Silva, Claudio; Boronat Medico, Jordi (2015-12-31)
      Article
      Open Access
      We present a set of three-body interaction models based on the Slater-Kirkwood (SK) potential that are suitable for the study of the energy, structural, and elastic properties of solid He4 at high pressure. Our effective ...
    • High altitude balloon mission design and implementation for a mini-launcher 

      Bonet Osorio, Lluis (Universitat Politècnica de Catalunya, 2011-04-08)
      Bachelor thesis
      Open Access
      Durante muchos años, las sondas estratosféricas han sido usadas para experimentos atmosféricos. Los nuevos globos de LATEX de bajo coste permiten poner hasta 4 kilogramos de carga de pago en el espacio cercano. Típicamente, ...
    • Layering transition in superfluid helium adsorbed on a carbon nanotube mechanical resonator 

      Noury, Adrien; Vergara Cruz, Jorge; Morfin, Pascal; Plaçais, Bernard; Gordillo Bargueño, Maria Carmen; Boronat Medico, Jordi; Balibar, Sébastien; Bachtold, Adrian (American Institute of Physics (AIP), 2019-04-23)
      Article
      Open Access
      Helium is recognized as a model system for the study of phase transitions. Of particular interest is the superfluid phase in two dimensions. We report measurements on superfluid helium films adsorbed on the surface of a ...
    • On the stability of small vacancy clusters in solid 4He 

      Lutsyshyn, Yaroslav; Rota, Riccardo; Boronat Medico, Jordi (2011-03)
      Article
      Restricted access - publisher's policy
      We study numerically properties of multiple vacancies in solid 4He at zero temperature. Up to four vacancies were introduced into the solid through incommensuration between the number of available lattice sites and the ...
    • Quantum halo states in helium tetramers 

      Stipanovic, P.; Vranješ Markic, Leandra; Boronat Medico, Jordi (2017-01-12)
      Article
      Open Access
      The universality of quantum halo states enables a comparison of systems from different fields of physics, as demonstrated in two- and three-body clusters. In the present work, we studied weakly bound helium tetramers in ...
    • Quantum phase transition with a simple variational ansatz 

      Lutsyshyn, Yaroslav; Astrakharchik, Grigori; Cazorla, C; Boronat Medico, Jordi (2014-12-11)
      Article
      Open Access
      We study the zero-temperature quantum phase transition between liquid and hcp solid He-4. We use the variational method with a simple yet exchange-symmetric and fully explicit wave function. It is found that the optimized ...
    • Structure of halo and quasi-halo helium–helium–alkali trimers 

      Stipanovic, P.; Vranješ Markic, Leandra; Boronat Medico, Jordi (2017-05-01)
      Article
      Open Access
      We report a diffusion Monte Carlo study of A4He2 and A4He3He trimers’ structural properties, were A is one of the alkali atoms 6,7Li, 23Na, 39K, 85Rb or 133Cs. Some of them are in a pure halo state, characterized by large ...
    • The limit of mechanical stability in quantum crystals: a diffusion Monte Carlo study of solid He-4 

      Cazorla Silva, Claudio; Boronat Medico, Jordi (2015-07-01)
      Article
      Open Access
      We present a first-principles study of the energy and elastic properties of solid helium at pressures below the range in which it is energetically stable. We find that the limit of mechanical stability in hcp He is bar, ...