CERN Accelerating science

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2020-02-25
06:57
Study of a data analysis method for the angle resolving silicon telescope / Žugec, P (Zagreb U., Phys. Dept.) ; Barbagallo, M (INFN, Bari ; CERN) ; Andrzejewski, J (Lodz U.) ; Perkowski, J (Lodz U.) ; Colonna, N (INFN, Bari) ; Bosnar, D (Zagreb U., Phys. Dept.) ; Gawlik, A (Lodz U.) ; Sabaté-Gilarte, M (CERN ; Seville U.) ; Bacak, M (CERN ; TU Vienna) ; Mingrone, F (CERN) et al.
A new data analysis method is developed for the angle resolving silicon telescope introduced at the neutron time of flight facility n_TOF at CERN. The telescope has already been used in measurements of several neutron induced reactions with charged particles in the exit channel. [...]
arXiv:2002.09031.- 2020 - 24 p. - Published in : JINST 15 (2020) P02011

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2020-02-25
06:57
Novel low resistivity glass: MRPC detectors for ultra high rate applications / Liu, Z (CERN ; World Lab., Geneva) ; Beyer, R (HZDR, Dresden) ; Dreyer, J (HZDR, Dresden) ; Fan, X (HZDR, Dresden) ; Greifenhagen, R (HZDR, Dresden) ; Kim, D W (Gangneung-Wonju Natl. U.) ; Kotte, R (HZDR, Dresden) ; Garcia, A Laso (HZDR, Dresden) ; Naumann, L (HZDR, Dresden) ; Römer, K (HZDR, Dresden) et al.
Multigap Resistive Plate Chambers (MRPCs) are often used as time-of-flight (TOF) detectors for high-energy physics and nuclear experiments thanks to their excellent time accuracy. For the Compressed Baryonic Matter (CBM) TOF system, MRPCs are required to work at particle fluxes on the order of 1–10 kHz/$cm^2$ for the outer region and 10–25 kHz/$cm^2$ for the central region. [...]
2020 - 6 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 959 (2020) 163483

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2020-02-25
06:57
Residual activation of the SPES Front-End system: a comparative study between the MCNPX and FLUKA codes / Donzella, Antonietta (U. Brescia ; INFN, Pavia) ; Ferrari, Matteo (Brescia U. ; INFN, Pavia ; CERN) ; Zenoni, Aldo (Brescia U. ; INFN, Pavia) ; Paderno, Diego (Brescia U.) ; Bodini, Ileana (Brescia U.) ; Villa, Valerio (Brescia U.) ; Ballan, Michele (INFN, Legnaro) ; Centofante, Lisa (Brescia U. ; INFN, Legnaro) ; Monetti, Alberto (INFN, Legnaro) ; Petrovich, Carlo (ENEA, Bologna) et al.
A study of the residual activation of the Front-End system structure of the SPES (Selective Production of Exotic Species) facility, currently under construction at the Legnaro National Laboratories of INFN, Italy, is performed. The study provides useful information for the planning of inspections, maintenance operations and decommissioning of the facility as well as for the assessment of radiological conditions and safety requirements in the design and operation of any accelerator-driven radioactive ion beam facility. [...]
2020 - 13 p. - Published in : Eur. Phys. J. A 56 (2020) 54

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2020-02-25
06:57
Isospin Properties of Nuclear Pair Correlations From the Level Structure of the Self-Conjugate Nucleus $^{88}$Ru / Cederwall, B (Royal Inst. Tech., Stockholm) ; Liu, X (Royal Inst. Tech., Stockholm) ; Aktas, Ö (Royal Inst. Tech., Stockholm) ; Ertoprak, A (Royal Inst. Tech., Stockholm ; Istanbul U.) ; Zhang, W (Royal Inst. Tech., Stockholm) ; Qi, C (Royal Inst. Tech., Stockholm) ; Clément, E (GANIL) ; de France, G (GANIL) ; Ralet, D (CSNSM, Orsay) ; Gadea, A (Valencia U., IFIC) et al.
The low-lying energy spectrum of the extremely neutron-deficient self-conjugate ($N$=Z) nuclide $^{88}_{44}$Ru$_{44}$ has been measured using the combination of the Advanced Gamma Tracking Array (AGATA) spectrometer, the NEDA and Neutron Wall neutron detector arrays, and the DIAMANT charged particle detector array. Excited states in $^{88}$Ru were populated via the $^{54}$Fe($^{36}$Ar,2n$γ$)$^{88}$Ru* fusion-evaporation reaction at the Grand Accélérateur National d’Ions Lourds (GANIL) accelerator complex. [...]
2020 - 6 p. - Published in : Phys. Rev. Lett. 124 (2020) 062501 Fulltext from Publisher: PDF;

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2020-02-25
06:57
Lead evaporation instabilities and failure mechanisms of the micro oven at the GTS-LHC ECR ion source at CERN / Kövener, T (CERN ; U. Hamburg (main)) ; Küchler, D (CERN) ; Toivanen, V A (Jyvaskyla U.)
The GTS-LHC ECR ion source (named after the Grenoble Test Source and the Large Hadron Collider) at CERN provides heavy ion beams for the chain of accelerators from Linac3 up to the LHC for high energy collision experiments and to the Super Proton Synchrotron for fixed target experiments. During the standard operation, the oven technique is used to evaporate lead into the source plasma to produce multiple charged lead ion beams. [...]
2020 - 5 p. - Published in : Rev. Sci. Instrum. 91 (2020) 013320

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2020-02-25
06:57
Introducing Timepix2, a frame-based pixel detector readout ASIC measuring energy deposition and arrival time / Wong, W S ; Alozy, J (CERN) ; Ballabriga, R (CERN) ; Campbell, M (CERN) ; Kremastiotis, I (CERN) ; Llopart, X (CERN) ; Poikela, T (CERN) ; Sriskaran, V (CERN) ; Tlustos, L (CERN ; Freiburg U. ; U. Houston (main)) ; Turecek, D (U. Houston (main) ; Unlisted, CZ ; Charles U., Prague (main))
The Timepix2 ASIC (application-specific integrated circuit) is the upgraded successor to the Timepix [1] hybrid pixel detector readout chip. Like the original, Timepix2 contains a matrix of 65k square pixels of 55 μm pitch that can be coupled to a similarly segmented semiconductor sensor, or integrated in an ionising gas detector. [...]
2020 - 8 p. - Published in : Radiat. Meas. 131 (2020) 106230 Fulltext: PDF;

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2020-02-25
06:56
Measurements and FLUKA simulations of aluminium, bismuth and indium activation by stray radiation from the annihilation of low energy antiprotons / Ahdida, C (CERN) ; Froeschl, R ; Iliopoulou, E ; Infantino, A ; Jensen, S
The Antiproton Decelerator at the CERN Proton Synchrotron complex provides antiprotons at a kinetic energy of 5.3 Mev to several experiments. The stray radiation from antiproton annihilations is the most important radiation field for radiation protection in the Antiproton Decelerator experimental areas..
2020 - 6 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 950 (2020) 162972

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2020-02-25
06:56
The CLAS12 Geant4 simulation / Ungaro, M (Jefferson Lab) ; Angelini, G (George Washington U.) ; Battaglieri, M (INFN, Genoa) ; Burkert, V D (Jefferson Lab) ; Carman, D S (Jefferson Lab) ; Chatagnon, P (Orsay, IAS) ; Contalbrigo, M (INFM, Ferrara) ; Defurne, M (IRFU, Saclay) ; De Vita, R (INFN, Genoa) ; Duran, B (Temple U.) et al.
The Geant4 Monte-Carlo (GEMC) package is used to simulate the passage of particles through the various CLAS12 detectors. The geometry is implemented through a database of Geant4 volumes created either through the GEMC native API, by the CLAS12 geometry service, or imported from the CAD engineering model. [...]
2020 - 20 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 959 (2020) 163422

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2020-02-25
06:56
Monte Carlo simulation of charge collection processes in Monolithic Active Pixel Sensors for the ALICE ITS upgrade / Šuljić, Miljenko (INFN, Trieste ; Trieste U. ; CERN) ; Camerini, Paolo (INFN, Trieste ; Trieste U.) ; van Hoorne, Jacobus W (CERN)
A precise simulation of the response of Monolithic Active Pixel Sensors (MAPS) is difficult to achieve because of the difficulty in describing the charge collection process both in the epitaxial layer, a typically only partially depleted active volume, and in the substrate, a low resistivity bulk, of the sensor. Transient TCAD simulations provide good description of the electric field, but are too slow to be used in the simulation and analysis chain of HEP experiments. [...]
2020 - 15 p. - Published in : Nucl. Instrum. Methods Phys. Res., A 950 (2020) 162882

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2020-02-25
06:56
The Higgs Boson discovery / Jakobs, Karl (Freiburg U., Inst. Phys. Chem.) ; Seez, Chris (Imperial Coll., London)
The results presented by the ATLAS Collaboration (2012) and the CMS Collaboration (2012) summarised above, provided conclusive evidence for the discovery of a new particle with a mass around 125 GeV in the data taken by the ATLAS and CMS experiments. The measured signal strength was found to be consistent with the one expected for the production of the Higgs boson of the Standard Model. [...]
Scholarpedia, 2015 - Published in : Scholarpedia 10 (2015) 32413

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