CERN Accelerating science

Preprints

新增:
2016-12-02
17:20
Parameters for aperture calculations at injection for HL-LHC* / Bruce, Roderik (CERN) ; Bracco, Chiara (CERN) ; De Maria, Riccardo (CERN) ; Giovannozzi, Massimo (CERN) ; Redaelli, Stefano (CERN) ; Tomas Garcia, Rogelio (CERN) ; Velotti, Francesco Maria (CERN) ; Wenninger, Jorg (CERN)
Accurate evaluations of the margins of available aperture in the LHC and HL-LHC are very important, in order to judge if proposed optics and hardware are adequate, and to push the machine performance. [...]
CERN-ACC-2016-0328.
- 2016. - 25 p.
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2016-12-02
13:00
The Polar Nano Regions $\rightleftharpoons$ Relaxor Transition in $Pb_{1-X}(Sc_{1/2}Nb_{1/2})O_{3-X}$; $X$ = bulk concentration of nearest neighbor [Pb-O] divacancies / Burton, B P ; Cockayne, Eric ; Gopman, D B ; Dogan, Gunay ; Hood, Sarah
In previous work, molecular dynamics simulations based on a first-principles-derived effective Hamiltonian for $Pb_{1-X}(Sc_{1/2}Nb_{1/2})O_{3-X}$~ (PSN), with nearest-neighbor Pb-O divacancy pairs, was used to calculate $X_{\rm [Pb-O]}$~vs.~T, phase diagrams for PSN with: ideal rock-salt type chemical order; nanoscale chemical short-range order; and random chemical disorder. [...]
arXiv:1612.00398.
- 2016.
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2016-12-02
13:00
(Non)-universality of vortex reconnections in superfluids / Villois, Alberto ; Krstulovic, Giorgio ; Proment, Davide
An insight into vortex reconnections in superfluids is presented making use of analytical results and numerical simulations of the Gross--Pitaevskii model. [...]
arXiv:1612.00386.
- 2016. - 11 p.
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2016-12-02
13:00
Theory of Multiwave Mixing within the Superconducting Kinetic-Inductance Traveling-Wave Amplifier / Erickson, Robert P ; Pappas, David P
We present a theory of parametric mixing within the coplanar waveguide (CPW) of a superconducting nonlinear kinetic-inductance traveling-wave (KIT) amplifier engineered with periodic dispersion loadings. [...]
arXiv:1612.00365.
- 2016. - 52 p.
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2016-12-02
13:00
Single-shot measurement of the orbital-angular-momentum spectrum of partially coherent fields / Kulkarni, Girish ; Sahu, Rishabh ; Magana-Loaiza, Omar S ; Boyd, Robert W ; Jha, Anand K
We propose an image inversion-based interferometric technique for measuring the orbital-angular- momentum (OAM) spectrum of a field that is an incoherent mixture of OAM eigenstates. [...]
arXiv:1612.00335.
- 2016. - 8 p.
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2016-12-02
13:00
The Tyranny of Data? The Bright and Dark Sides of Data-Driven Decision-Making for Social Good / Lepri, Bruno ; Staiano, Jacopo ; Sangokoya, David ; Letouze, Emmanuel ; Oliver, Nuria
The unprecedented availability of large-scale human behavioral data is profoundly changing the world we live in. [...]
arXiv:1612.00323.
- 2016.
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2016-12-02
13:00
First evidence of end-cap control in the synthesis of long-chain polyynes by intense ultrashort laser pulse irradiation / Ramadhan, Ali ; Wesolowski, Michal ; Wakabayashi, Tomonari ; Shiromaru, Haruo ; Fujino, Tatsuya ; Kodama, Takeshi ; Duley, Walter ; Sanderson, Joseph
Hydrogen- and methyl-capped polyynes were synthesized by irradiating pure liquid toluene with 35 femtosecond, 300 {\mu}J laser pulses having a central wavelength of 800 nm, generated by a regeneratively amplified Ti:sapphire tabletop laser at a repetition rate of 1 kHz. [...]
arXiv:1612.00320.
- 2016. - 13 p.
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2016-12-02
13:00
Clustering and preferential concentration of finite-size particles in forced homogeneous-isotropic turbulence / Uhlmann, Markus ; Chouippe, Agathe
We have performed interface-resolved direct numerical simulations of forced homogeneous-isotropic turbulence in a dilute suspension of spherical particles in the Reynolds number range Re-lambda=115-140. [...]
arXiv:1612.00318.
- 2016.
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2016-12-02
13:00
Interactions in an acoustic world / Simaciu, Ion ; Dumitrescu, Gheorghe ; Borsos, Zoltan ; Bradac, Mariana
The present paper aims to complete an earlier paper where the acoustic world was introduced. [...]
arXiv:1612.00294.
- 2016. - 10 p.
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2016-12-02
13:00
Comment on 'Attempts to test an alternative electrodynamic theory of superconductors by low-temperature scanning tunneling and atomic force microscopy' / Tiwari, S C
It is argued that alternative electrodynamics of superconductivity proposed by Hirsch lacks mathematical rigour and it is conceptually flawed. [...]
arXiv:1612.00293.
- 2016. - 3 p.
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