CERN Accelerating science

CERN Published Articles

Senast inlagda poster:
2016-04-29
07:05
Metrological analysis of a virtual flowmeter-based transducer for cryogenic helium / Arpaia, P (U. Naples (main) ; CERN) ; Girone, M (CERN ; Sannio U.) ; Liccardo, A (U. Naples (main)) ; Pezzetti, M (CERN) ; Piccinelli, F (Brescia U.)
The metrological performance of a virtual flowmeter-based transducer for monitoring helium under cryogenic conditions is assessed. At this aim, an uncertainty model of the transducer, mainly based on a valve model, exploiting finite-element approach, and a virtual flowmeter model, based on the Sereg-Schlumberger method, are presented. [...]
2015 - Published in : Rev. Sci. Instrum. 86 (2015) 125001

Detaljerad journal - Similar records
2016-04-29
07:05
Higgs decay $H \to \gamma \gamma$: New theoretical results and possible experimental implications / Gastmans, R ] (KU Leuven, FET) ; Wu, Sau Lan (Wisconsin U., Madison) ; Wu, Tai Tsun (CERN ; Harvard U. (main))
The contribution of one W loop to the decay of the Higgs particle into two gammas is recalculated. Since this matrix element is finite in the standard model, it should be calculated in a straightforward way without artifacts such as regularization or ghosts. [...]
2015 - 10 p. - Published in : Int. J. Mod. Phys. A 30 (2015) 1550200

Detaljerad journal - Similar records
2016-04-29
07:05
Impact of GEM foil hole geometry on GEM detector gain / Karadzhinova, A (Helsinki Inst. of Phys.) ; Nolvi, A (Helsinki U.) ; Veenhof, R (Uludag U. ; CERN) ; Tuominen, E (Helsinki Inst. of Phys.) ; Hæggström, E (Helsinki U.) ; Kassamakov, I (Helsinki Inst. of Phys. ; Helsinki U.)
Detailed 3D imaging of Gas Electron Multiplier (GEM) foil hole geometry was realized. Scanning White Light Interferometry was used to examine six topological parameters of GEM foil holes from both sides of the foil. [...]
2015 - Published in : J. Instrum. 10 (2015) P12014 Fulltext: PDF;

Detaljerad journal - Similar records
2016-04-29
07:05
The calibration of the Precision Laser Inclinometer / Batusov, V (Dubna, JINR) ; Budagov, J (Dubna, JINR) ; Lyablin, M (Dubna, JINR) ; Shirkov, G (Dubna, JINR) ; Gayde, J -Ch (CERN) ; Mergelkuhl, D (CERN)
The calibration methods of the two-coordinate Precision Laser Inclinometer are presented. For the inclinometer studied sample of the, the calibration coefficients 630 ± 70 and 531 ± 66 μrad/V have been determined by two independent methods..
2015 - 5 p. - Published in : Phys. Part. Nucl. Lett. 12 (2015) 819-823

Detaljerad journal - Similar records
2016-04-29
07:05
The sensitivity limitation by the recording ADC to Laser Fiducial Line and Precision Laser Inclinometer / Batusov, V (Dubna, JINR) ; Budagov, J (Dubna, JINR) ; Lyablin, M (Dubna, JINR) ; Shirkov, G (Dubna, JINR) ; Gayde, J -Ch (CERN) ; Mergelkuhl, D (CERN)
For metrology set-ups using a laser beam (The Laser Fiducial Line, the Precision Laser Inclinometer) the recording noise has been determined. This noise is limiting the measurement precision of the beam displacement Δx and consequently the precision Δψ of measurement of the beam inclination angle. [...]
2015 - 6 p. - Published in : Phys. Part. Nucl. Lett. 12 (2015) 813-818

Detaljerad journal - Similar records
2016-04-29
07:05
GEANT4 simulations of the n_TOF spallation source and their benchmarking / Lo Meo, S (ENEA, Bologna ; INFN, Bologna) ; Cortés-Giraldo, M A (Seville U.) ; Massimi, C (INFN, Bologna ; Bologna U.) ; Lerendegui-Marco, J (Seville U.) ; Barbagallo, M (INFN, Bari) ; Colonna, N (INFN, Bari) ; Guerrero, C (Seville U.) ; Mancusi, D (IRFU, SPP, Saclay) ; Mingrone, F (INFN, Bologna) ; Quesada, J M (Seville U.) et al. /n_TOF
Neutron production and transport in the spallation target of the n_TOF facility at CERN has been simulated with GEANT4. The results obtained with different models of high-energy nucleon-nucleus interaction have been compared with the measured characteristics of the neutron beam, in particular the flux and its dependence on neutron energy, measured in the first experimental area. [...]
2015 - Published in : Eur. Phys. J. A 51 (2015) 160

Detaljerad journal - Similar records
2016-04-29
07:05
A fast, ultra-low and frequency-scalable power consumption, 10-bit SAR ADC for particle physics detectors / Firlej, M (AGH-UST, Cracow) ; Fiutowski, T (AGH-UST, Cracow) ; Idzik, M (AGH-UST, Cracow) ; Kulis, S (AGH-UST, Cracow ; CERN) ; Moron, J (AGH-UST, Cracow) ; Swientek, K (AGH-UST, Cracow)
The design and measurements results of a fast 10-bit SAR ADC with ultra-low and scalable with frequency power consumption, developed for readout systems for detectors at future particle physics colliders (ILC, CLIC, LHC Upgrade), are described. A prototype ASIC was designed and fabricated in 130 nm CMOS technology and a wide spectrum of static (INLlesssim0.5 LSB, DNLlesssim0.5 LSB) and dynamic (SINAD ~58 dB, ENOB~9.3) measurements was performed to study and quantify the ADC performance. [...]
2015 - Published in : J. Instrum. 10 (2015) P11012 Fulltext: PDF;

Detaljerad journal - Similar records
2016-04-29
07:05
A novel Beam Halo Monitor for the CMS experiment at the LHC / Orfanelli, S (Natl. Tech. U., Athens ; CERN) ; Dabrowski, A E (CERN) ; Giunta, M (CERN) ; Loos, R (CERN) ; Ambrose, M J (Minnesota U.) ; Mans, J (Minnesota U.) ; Rusack, R (Minnesota U.) ; Stifter, K (Minnesota U.) ; Stickland, D (Princeton U.) ; Fabbri, F (INFN, Bologna) et al.
A novel Beam Halo Monitor (BHM) has been designed and built for the CMS experiment at the LHC. It will provide an online, bunch-by-bunch measurement of background particles created by interactions of the proton beam with residual gas molecules in the vacuum chamber or with collimator material upstream of CMS. [...]
2015 - Published in : J. Instrum. 10 (2015) P11011 Fulltext: PDF;

Detaljerad journal - Similar records
2016-04-29
07:05
Scaling and asymptotic properties of evaporated neutron inclusive cross sections in high energy hadron–nucleus and nucleus–nucleus interactions / Galoyan, A S (Dubna, JINR) ; Ribon, A (CERN) ; Uzhinsky, V V (Dubna, JINR)
New properties of the evaporated neutron (E < 30 MeV) energy spectra in hadron–nucleus interactions have been found. Particularly, the spectra approach the asymptotic regime, namely, they weakly depend on the collision energy at momenta of projectile protons larger than 5–6 GeV/c, the spectra for various nuclei are similar, and can be approximately described by the function A$^{n}$ f(E). [...]
2015 - 5 p. - Published in : JETP Lett. 102 (2015) 324-328

Detaljerad journal - Similar records
2016-04-29
07:05
Precision Measurement of the Helium Flux in Primary Cosmic Rays of Rigidities 1.9 GV to 3 TV with the Alpha Magnetic Spectrometer on the International Space Station / Aguilar, M (Madrid, CIEMAT) ; Aisa, D (INFN, Perugia ; Perugia U.) ; Alpat, B (INFN, Perugia) ; Alvino, A (INFN, Perugia) ; Ambrosi, G (INFN, Perugia) ; Andeen, K (Karlsruhe U., EKP) ; Arruda, L (Lisbon, LIFEP) ; Attig, N (Julich, NIC) ; Azzarello, P (Geneva U.) ; Bachlechner, A (Aachen, Tech. Hochsch.) et al. /AMS
Knowledge of the precise rigidity dependence of the helium flux is important in understanding the origin, acceleration, and propagation of cosmic rays. A precise measurement of the helium flux in primary cosmic rays with rigidity (momentum/charge) from 1.9 GV to 3 TV based on 50 million events is presented and compared to the proton flux. [...]
2015 - 9 p. - Published in : Phys. Rev. Lett. 115 (2015) 211101 Fulltext: PDF;

Detaljerad journal - Similar records