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CERN Accelerating science

Published Articles

Πρόσφατες προσθήκες:
2021-05-05
06:07
Studies of the factorisation of proton densities in van der Meer scans and its impact on precision luminosity measurements for CMS / Major, Peter (Eotvos U.) /CMS Collaboration
The factorisability of the transverse proton density functions in $x$ and $y$ is assumed in the analysis of single-plane van der Meer (vdM) scans for absolute luminosity calibration. A correction to the calibration constants for nonfactorisation effects in the proton density is then determined. [...]
SISSA, 2019 - 5 p. - Published in : PoS EPS-HEP2019 (2020) 199
In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019, pp.199

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2021-05-05
06:07
Precision luminosity measurement of proton-proton collisions at the CMS experiment in Run 2 / Major, Peter (Eotvos U.) /CMS Collaboration
Precision luminosity calibration is critical to determine fundamental parameters of the standard model and to constrain or to discover beyond-the-standard-model phenomena at LHC. The luminosity determination at the LHC interaction point 5 with the CMS detector, using proton-proton collisions at 13 and 5.02 TeV during Run 2 of the LHC (2015-2018), is reported. [...]
SISSA, 2019 - 5 p. - Published in : PoS EPS-HEP2019 (2020) 198
In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019, pp.198

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2021-05-05
06:07
High rate performance of Small-pad Resistive Micromegas. Comparison of different resistive protection concepts. / Camerlingo, Maria Teresa (Rome III U. ; INFN, Rome3) ; Alviggi, Mariagrazia (INFN, Naples ; Naples U.) ; Canale, Vincenzo (Naples U. ; INFN, Naples) ; Della Pietra, Massimo (Naples U. ; INFN, Naples) ; Di Donato, Camilla (INFN, Naples ; Naples, Inst. U. Navale) ; Iengo, Paolo (CERN) ; Iodice, Mauro (INFN, Rome3) ; Petrucci, Fabrizio (Rome III U. ; INFN, Rome3) ; Rossi, Eleonora (INFN, Rome3 ; Rome III U.) ; Sekhniaidze, Givi (INFN, Naples)
Motivated mainly by future detector upgrades at HL-LHC and at future colliders, mostof the HEP R&D; collaborations have been focusing on the design of new prototypes ofparticle detectors for operation under very high particle flow. In the field of Micro-Pattern-Gaseous-Detectors, the Small-pad resistive MICROMEGAS prototypes were designed toovercome the actual limitations of more standard strip resistive MICROMEGAS. [...]
SISSA, 2019 - 4 p. - Published in : PoS EPS-HEP2019 (2020) 185
In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019, pp.185

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2021-05-05
06:07
The ATLAS Trigger and Data Acquisition Upgrades for the High-Luminosity LHC (HL-LHC) / Valente, Marco (Geneva U.) /ATLAS Collaboration
The ATLAS experiment at CERN has started the construction of upgrades for the High Luminosity LHC (HL-LHC), with collisions due to start in 2026. In order to deliver an order of magnitude more data than previous LHC runs, 7 TeV protons will collide at 14 TeV with an instantaneous luminosity of up to $7.5 \cdot 10^{34}\;\text{cm}^{-2}\text{s}^{-1}$, resulting in much higher pileup and data rates than the current experiment was designed to handle. [...]
SISSA, 2019 - 5 p. - Published in : PoS EPS-HEP2019 (2020) 184
In : European Physical Society Conference on High Energy Physics (EPS-HEP) 2019, Ghent, Belgium, 10 - 17 Jul 2019, pp.184

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2021-05-05
06:07
Branching ratios and form factors in $B^0_s \to D^{(*)-}_s\mu^+\nu_\nu$ decays / Manuzzi, D (INFN, Bologna ; Bologna U.) /LHCb Collaboration
As a necessary step towards the test of lepton flavor universality provided by the observable $R$($D$$_{s}^{(*)}$ = $B$($B$$_{s}^{0}$ → $D$$_{s}^{(*)}$$^{-}$ $\tau$$^{+}$$\nu$$_{\tau}$)/$B$($B$$_{s}^{0}$ → $D$$_{s}^{(*)}$$^{-}$ $\mu$$^{+}$$\nu$$_{\mu}$), the exlusive branching ratios and form factor of its denominator are going to be measured for the first time at an hadron collider..
2020 - 3 p. - Published in : Nuovo Cimento C 43 (2020) 81 Fulltext: PDF;
In : 18th Incontri di Fisica delle Alte Energie, Naples, Italy, 8 - 10 April 2019, pp.81

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2021-05-04
06:01
Two-Stage SQUID Amplifier for the Frequency Multiplexed Readout of the X-IFU X-Ray Camera / Kiviranta, Mikko (Espoo, Tech. Research Ctr.) ; Grönberg, Leif (Espoo, Tech. Research Ctr.) ; Puranen, Tuomas (Helsinki U.) ; van der Kuur, Jan (SRON, Groningen) ; Beev, Nikolai (Espoo, Tech. Research Ctr. ; CERN) ; Salonen, Jaakko (Espoo, Tech. Research Ctr.) ; Hazra, Dibyendu (Espoo, Tech. Research Ctr.) ; Korpela, Seppo (Helsinki U.)
The X-ray Integral Field Unit (X-IFU) is a cryogenic X-ray camera intended for the ATHENA space observatory. Its focal plane will contain a kilopixel array of Transition Edge Sensors (TESs), originally intended to be read out by a Frequency Domain Multiplexer involving 40 carrier frequencies in the 1-5 MHz range per readout channel. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 1600605

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2021-05-04
06:01
A reference compound for $^{199m}$ Hg perturbed angular correlation of $\gamma$ -rays spectroscopy / Jancsó, Attila (Szeged U.) ; Correia, Joao G (Lisbon, IST ; CERN) ; Balogh, Ria K (Szeged U.) ; Schell, Juliana (Duisburg-Essen U. ; CERN) ; Jensen, Marianne L (Bohr Inst.) ; Szunyogh, Daniel (Copenhagen U.) ; Thulstrup, Peter W (Copenhagen U.) ; Hemmingsen, Lars (Copenhagen U.)
$^{199m}$ Hg is a very useful probe for perturbed angular correlation of $\gamma$ -rays (PAC) spectroscopy. Here we present $^{199m}$ Hg PAC data for a Hg $^{2+}$ containing compound, Hg(Cys)$_{2}$(s), giving one unique nuclear quadrupole interaction (NQI). [...]
2021 - Published in : Nucl. Instrum. Methods Phys. Res., A 1002 (2021) 165154

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2021-05-04
06:00
The EEE Multigap Resistive Plate Chambers as tracking devices to monitor the stability of a civil building / Pinto, C (Enrico Fermi Ctr., Rome) ; Abbrescia, M (Enrico Fermi Ctr., Rome ; INFN, Bari) ; Avanzini, C (Enrico Fermi Ctr., Rome ; INFN, Pisa ; Pisa U.) ; Baldini, L (Enrico Fermi Ctr., Rome ; INFN, Pisa ; Pisa U.) ; Baldini Ferroli, R (Enrico Fermi Ctr., Rome ; INFN, Pisa ; Pisa U.) ; Batignani, L G (Enrico Fermi Ctr., Rome ; Frascati) ; Battaglieri, M (Enrico Fermi Ctr., Rome ; INFN, Genoa ; Genoa U.) ; Boi, S (Enrico Fermi Ctr., Rome ; INFN, Cagliari ; Cagliari U.) ; Bossini, E (Enrico Fermi Ctr., Rome ; INFN, Siena ; Siena U.) ; Carnesecchi, F (Enrico Fermi Ctr., Rome ; INFN, Bologna ; Bologna U.) et al.
Due to their efficiency, tracking capabilities and long-term operational conditions, Multigap Resistive Plate Chambers (MRPC) may be used in a stable location in coincidence with additional detectors fixed to other parts of a civil building, to detect relative displacements of different parts of the building due to long term deformations of the structure. In this contribution we report the results of two different measurements carried out in the Department of Physics and Astronomy of the University of Catania (with three floors above the ground and an underground basement), using one of the MRPC telescopes of the Extreme Energy Events project, in coincidence with two scintillator-based muon telescopes located in various positions inside the building. [...]
2021 - 9 p. - Published in : JINST 16 (2021) C04003

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2021-05-04
06:00
Progress on the Upgrade of EDIPO, a 15 T Large Aperture Dipole / Araujo, Douglas Martins (CERN) ; Ballarino, Amalia (CERN) ; Bordini, Bernardo (CERN) ; Bottura, Luca (CERN) ; Hopkins, Simon C (CERN) ; Perez, Juan C (CERN) ; Ravaioli, Emmanuele (CERN) ; de Rijk, Gijs (CERN) ; Bruzzone, Pierluigi (Ecole Polytechnique, Lausanne) ; Sarasola, Xabier (Ecole Polytechnique, Lausanne) et al.
The upgraded magnet assembly of the EDIPO test facility aims at generating 15 T at 4.2 K and 85% of short sample limit in a large rectangular aperture and over a uniform field length of 1000 mm. During 2020 the design studies have concentrated on two flared-end block-coil design options with four double-pancake coils, two per pole. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 9500205

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2021-05-04
06:00
Study of a Current-Based Quench Detection Method for CCT Magnets via a Co-Wound Superconducting Sensing Wire / Gao, Jiani (PSI, Villigen) ; Auchmann, Bernhard (CERN ; PSI, Villigen) ; Hug, Christoph (PSI, Villigen) ; Pautz, Andreas (PSI, Villigen ; ITS, Lausanne) ; Sanfilippo, Stephane (PSI, Villigen)
To respond to the needs of the future accelerators and the upgrade of existing machines, superconducting magnet technology is continuously evolving in the direction of high fields and high current densities. As a result, a fast and efficient quench detection becomes an essential part of the magnet design in order to safely release the stored magnetic energy during a quench. [...]
2021 - 5 p. - Published in : IEEE Trans. Appl. Supercond. 31 (2021) 4701105

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