CERN Accelerating science

Published Articles

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2015-07-30
17:13
Design of the 15 GHz BPM test bench for the CLIC test facility to perform precise stretchedwire RF measurements / Silvia Zorzetti, Silvia (CERN , Universitá di Pisa) ; Fanucci, Luca (Universitá di Pisa) ; Galindo Muño, Natalia (CERN) ; Wendt, Manfred (CERN)
The Compact Linear Collider (CLIC) requires a low emittance beam transport and preservation, thus a precise control of the beam orbit along up to 50 km of the accelerator components in the sub-m regime is required. Within the PACMAN3 (Particle Accelerator Components Metrology and Alignment to the Nanometer Scale) PhD training action a study with the objective of pre-aligning the electrical centre of a 15 GHz cavity beam position monitor (BPM) to the magnetic centre of the main beam quadrupole is initiated. [...]
CERN-ACC-2015-0079.- Geneva : CERN, 2015 - Published in : IOP science: 26 (2015) , no. 9 Fulltext: PDF;

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2015-07-30
07:57
Particle creation and non-equilibrium thermodynamical prescription of dark fluids for universe bounded by an event horizon / Saha, Subhajit ; Biswas, Atreyee ; Chakraborty, Subenoy
In the present work, flat FRW model of the universe is considered to be an isolated open thermodynamical system where non-equilibrium prescription has been studied using the mechanism of particle creation. In the perspective of recent observational evidences, the matter distribution in the universe is assumed to be dominated by dark matter and dark energy. [...]
arXiv:1507.08224.- 2015 - 13 p. - Published in : Astrophys. Space Sci. 356 (2015) 141-147 External link: Preprint

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2015-07-30
07:57
Observational evidence for travelling wave modes bearing distance proportional shifts / Guruprasad, V
Discrepancies of range between the Space Surveillance Network radars and the Deep Space Network in tracking the 1998 earth flyby of NEAR, and between ESA's Doppler and range data in Rosetta's 2009 flyby, reveal a consistent excess delay, or lag, equal to instantaneous one-way travel time in the telemetry signals. These lags readily explain all details of the flyby anomaly, and are shown to be symptoms of chirp d'Alembertian travelling wave solutions, relating to traditional sinusoidal waves by a rotation of the spectral decomposition due to the clock acceleration caused by the Doppler rates during the flybys. [...]
arXiv:1507.08222.- 2015 - 6 p. - Published in : Europhys. Lett. 110 (2015) 54001 External link: Preprint

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2015-07-30
07:57
Topological Dependence of Kepler's Third Law for Collisionless Periodic Three-Body Orbits with Vanishing Angular Momentum and Equal Masses / Dmitrašinović, V ; Šuvakov, Milovan
We present results of numerical calculations showing a three-body orbit's period's $T$ dependence on its topology. This dependence is a simple linear one, when expressed in terms of appropriate variables, suggesting an exact mathematical law. [...]
arXiv:1507.08096.- 2015 - 9 p. - Published in : Phys. Lett. A 379 (2015) 1939-1945 External link: Preprint

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2015-07-30
07:57
Ultra-broadband dual-comb spectroscopy across 1.0-1.9 {\mu}m / Okubo, Sho ; Iwakuni, Kana ; Inaba, Hajime ; Hosaka, Kazumoto ; Onae, Atsushi ; Sasada, Hiroyuki ; Hong, Feng-Lei
We have carried out dual-comb spectroscopy and observed in a simultaneous acquisition a 140-THz-wide spectrum from 1.0 to 1.9 {\mu}m using two fiber-based frequency combs phase-locked to each other. This ultra-broad wavelength bandwidth is realized by setting the difference between the repetition rates of the two combs to 7.6 Hz using the sub-Hz-linewidth fiber combs. [...]
arXiv:1507.08006.- 2015 - 13 p. - Published in : Applied Physics Express 8 (2015) 082402 External link: Preprint

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2015-07-30
07:57
Hybrid approaches for multiple-species stochastic reaction-diffusion models / Spill, Fabian ; Guerrero, Pilar ; Alarcon, Tomas ; Maini, Philip K ; Byrne, Helen
Reaction-diffusion models are used to describe systems in fields as diverse as physics, chemistry, ecology and biology. The fundamental quantities in such models are individual entities such as atoms and molecules, bacteria, cells or animals, which move and/or react in a stochastic manner. [...]
arXiv:1507.07992.- 2015 - 38 p. - Published in : Journal of Computational Physics (2015), pp. 429-445 External link: Preprint

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2015-07-30
07:57
Teachers are from Heaven, Students are from Hell - True or False? / Capretz, Luiz Fernando
Researchers have long tried to relate personality types to teaching and learning styles. It is believed that the psychological theory behind the Myers Briggs Type Indicator (MBTI) can help university teachers to accept variety in teaching and learning approaches. [...]
arXiv:1507.07883.- 2015 External link: Preprint

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2015-07-30
07:57
ms2: A molecular simulation tool for thermodynamic properties, new version release / Glass, Colin W ; Reiser, Steffen ; Rutkai, Gábor ; Deublein, Stephan ; Köster, Andreas ; Carrión, Gabriela Guevara ; Wafai, Amer ; Horsch, Martin ; Bernreuther, Martin F ; Windmann, Thorsten et al.
A new version release (2.0) of the molecular simulation tool ms2 [S. Deublein et al., Comput. [...]
arXiv:1507.07548.- 2015 External link: Preprint

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2015-07-30
07:55
Nonexistence of a $\Lambda nn$ bound state / Garcilazo, H ; Valcarce, A
It has been recently suggested the existence of a neutral bound state of two neutrons and a $\Lambda$ hyperon, $^3_\Lambda n$. We point out that using either simple separable potentials or a full-fledged calculation with realistic baryon-baryon interactions derived from the constituent quark cluster model there is no possibility for the existence of such a $\Lambda nn$ bound state. [...]
arXiv:1507.08061.- 2015 - 5 p. - Published in : Phys.Rev. C 89 (2014) 057001 External link: Preprint

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2015-07-30
07:55
Multiquark contributions to charm baryon spectroscopy / Carames, T F ; Valcarce, A
We study possible multiquark contributions to the charm baryon spectrum by considering higher order Fock space components. For this purpose we perform two different calculations. [...]
arXiv:1507.08046.- 2015 - 15 p. - Published in : Phys. Rev. D 90 (2014) 014042 External link: Preprint

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