Published Articles

უკანასკნელი დამატებები:
2015-10-08
16:39
 Design and First Measurements of an Alternative Calorimetry Chamber for the HZB Quadrupole Resonator / Keckert, Sebastian (Helmholtz-Zentrum Berlin) ; Kleindienst, Raphael (Helmholtz-Zentrum Berlin) ; Knobloch, Jens (Helmholtz-Zentrum Berlin) ; Kugeler, Oliver (Helmholtz-Zentrum Berlin) The systematic research on superconducting thin films requires dedicated testing equipment. The Quadrupole Resonator (QPR) is a specialized tool to characterize the superconducting RF properties of circular planar samples. [...] CERN-ACC-2015-0115.- Geneva : CERN, 2015 - Published in : Fulltext: PDF; In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015

2015-10-08
16:32
 Commissioning Results of the HZB Quadrupole Resonator / Kleindienst, Raphael (Helmholtz-Zentrum-Berlin) ; Burrill, Andrew (Helmholtz-Zentrum-Berlin) ; Knobloch, Jens (Helmholtz-Zentrum-Berlin) ; Kugeler, Oliver (Helmholtz-Zentrum-Berlin) Recent cavity results with niobium have demonstrated the necessity of a good understanding of both the BCS and residual resistance. For a complete picture and comparison with theory, it is essential that one can measure the RF properties as a function of field, temperature, frequency and ambient magnetic field. [...] CERN-ACC-2015-0114.- Geneva : CERN, 2015 - Published in : Fulltext: PDF; In : 17th International Conference on RF Superconductivity, Whistler, Canada, 13 - 18 Sep 2015

2015-10-08
08:24
 Reaction rate in an evanescent random walkers system / Ré, Miguel A ; Bustos, Natalia C Diffusion mediated reaction models are particularly ubiquitous in the description of physical, chemical or biological processes. The random walk schema is a useful tool for formulating these models. [...] arXiv:1510.02069.- 2015 - 6 p. - Published in : Papers in Physics 7 (2015) 070003 External link: Preprint

2015-10-08
08:24
 Bosonization and Lie Group Structure / Ha, Yuan K We introduce a concise quantum operator formula for bosonization in which the Lie group structure appears in a natural way. The connection between fermions and bosons is found to be exactly the connection between Lie group elements and the group parameters. [...] arXiv:1510.01957.- 2015 - 10 p. - Published in : Conf. Ser. 563 (2014) 012013 External link: Preprint

2015-10-08
08:24
 Influence of pulse width and detuning on coherent phonon generation / Nakamura, Kazutaka G ; Shikano, Yutaka ; Kayanuma, Yosuke We investigated the coherent phonon generation mechanism by irradiation of an ultrashort pulse with a simple two-level model. Our derived formulation shows that both impulsive stimulated Raman scattering (ISRS) and impulsive absorption (IA) simultaneously occur, and phonon wave packets are generated in the electronic ground and excited states by ISRS and IA, respectively. [...] arXiv:1510.01798.- 2015 - 8 p. - Published in : Phys. Rev. B 92 (2015) 144304 External link: Preprint

2015-10-08
08:24
 Fusion in a magnetically-shielded-grid inertial electrostatic confinement device / Hedditch, John ; Bowden-Reid, Richard ; Khachan, Joe Theory for a gridded inertial electrostatic confinement (IEC) fusion system is presented that shows a net energy gain is possible if the grid is magnetically shielded from ion impact. A simplified grid geometry is studied, consisting of two negatively-biased coaxial current-carrying rings, oriented such that their opposing magnetic fields produce a spindle cusp. [...] arXiv:1510.01788.- 2015 - 14 p. External link: Preprint

2015-10-08
08:24
 Inertial waves and mean velocity profiles in a rotating pipe and a circular annulus with axial flow / Yang, Yantao ; Ostilla-Mónico, Rodolfo ; Wu, J Z ; Orlandi, Paolo In this paper we solve the inviscid inertial wave solutions in a circular pipe or annulus rotating constantly about its axis with moderate angular speed. The solutions are constructed by the so-called helical wave functions. [...] arXiv:1510.01584.- 2015 - Published in : Phys. Rev. E 91 (2015) 013015 External link: Preprint

2015-10-08
08:24
 Salinity transfer in bounded double diffusive convection / Yang, Yantao ; van der Poel, Erwin P ; Ostilla-Mónico, Rodolfo ; Sun, Chao ; Verzicco, Roberto ; Grossmann, Siegfried ; Lohse, Detlef The double diffusive convection between two parallel plates is numerically studied for a series of parameters. The flow is driven by the salinity difference and stabilized by the thermal field. [...] arXiv:1510.01579.- 2015 - Published in : Journal of fluid mechanics 76 (2015) 8 External link: Preprint

2015-10-08
08:24
 Logarithmic mean temperature profiles and their connection to plume emissions in turbulent Rayleigh-B\'enard convection / van der Poel, Erwin P ; Ostilla-Mónico, Rodolfo ; Verzicco, Roberto ; Grossmann, Siegfried ; Lohse, Detlef Two-dimensional simulations of Rayleigh-B\'enard convection at $Ra = 5\times10^{10}$ show that vertical logarithmic mean temperature profiles can be observed in regions of the boundary layer where thermal plumes are emitted. The profile is logarithmic only in these regions and not in the rest of the boundary layer where it is sheared by the large scale wind and impacted by plumes. [...] arXiv:1510.01568.- 2015 - 6 p. - Published in : Phys. Rev. Lett. 115 (2015) 154501 External link: Preprint

2015-10-08
08:24
 Universal method for the synthesis of arbitrary polarization states radiated by a nanoantenna / Rodriguez-Fortuno, Francisco J ; Puerto, Daniel ; Griol, Amadeu ; Bellieres, Laurent ; Marti, Javier ; Martinez, Alejandro Optical nanoantennas efficiently convert confined optical energy into free-space radiation. The polarization of the emitted radiation depends mainly on nanoantenna shape, so it becomes extremely difficult to manipulate it unless the nanostructure is physically altered. [...] arXiv:1510.01530.- 2015 - 11 p. - Published in : Laser Photon. Rev. 8 (2014) 27-31 External link: Preprint

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