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On the role of secondary pions in spallation targets
/ Mancusi, Davide (CEA, DEN, Saclay, SERMA) ; Lo Meo, Sergio (ENEA, Bologna ; INFN, Bologna) ; Colonna, Nicola (INFN, Bari) ; Boudard, Alain (IRFU, Saclay) ; Cortés-Giraldo, Miguel Antonio (Seville U.) ; Cugnon, Joseph (Liege U.) ; David, Jean-Christophe (IRFU, Saclay) ; Leray, Sylvie (IRFU, Saclay) ; Lerendegui-Marco, Jorge (Seville U.) ; Massimi, Cristian (INFN, Bologna ; Bologna U.) et al.
We use particle-transport simulations to show that secondary pions play a crucial role for the development of the hadronic cascade and therefore for the production of neutrons and photons from thick spallation targets. In particular, for the n_TOF lead spallation target, irradiated with 20-GeV/c protons, neutral pions are involved in the production of ~90% of the high-energy photons; charged pions participate in ~40% of the integral neutron yield. [...]
arXiv:1603.05453.-
2017-05-02 - 16 p.
- Published in : Eur. Phys. J. A 53 (2017) 80
Fulltext: PDF; External link: Preprint
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2.
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Measurement of the $^{235}$U(n,f) cross section relative to the $^6$Li(n,t) and 10B(n,$\alpha$) standards from thermal to 170 keV neutron energy range at n_TOF
/ Amaducci, S. (Catania U. ; INFN, LNS) ; Cosentino, L. (INFN, LNS) ; Barbagallo, M. (INFN, Bari) ; Colonna, N. (INFN, Bari) ; Mengoni, A. (INFN, Bologna ; ENEA, Bologna) ; Massimi, C. (U. Bologna, DIFA ; INFN, Bologna) ; Lo Meo, S. (INFN, Bologna ; ENEA, Bologna) ; Finocchiaro, P. (INFN, LNS) ; Aberle, O. (CERN) ; Andrzejewski, J. (Lodz U.) et al.
The 235U(n,f) cross section was measured in a wide energy range at n_TOF relative to 6Li(n,t) and 10B(n,alpha), with high resolution and in a wide energy range, with a setup based on a stack of six samples and six silicon detectors placed in the neutron beam. This allowed us to make a direct comparison of the reaction yields under the same experimental conditions, and taking into account the forward/backward emission asymmetry. [...]
arXiv:1902.10631.-
2019-07-26 - 19 p.
- Published in : Eur. Phys. J. A 55 (2019) 120
Fulltext: PDF; Fulltext from Publisher: PDF;
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3.
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The large inner Micromegas modules for the Atlas Muon Spectrometer Upgrade: construction, quality control and characterization
/ Allard, J. (IRFU, Saclay) ; Andari, N. (IRFU, Saclay) ; Anfreville, M. (IRFU, Saclay) ; Attié, D. (IRFU, Saclay) ; Aubernon, E. (IRFU, Saclay) ; Aune, S. (IRFU, Saclay) ; Bachacou, H. (IRFU, Saclay) ; Balli, F. (IRFU, Saclay) ; Bauer, F. (IRFU, Saclay) ; Beltramelli, J. (IRFU, Saclay) et al.
The steadily increasing luminosity of the LHC requires an upgrade with high-rate and high-resolution detector technology for the inner end cap of the ATLAS muon spectrometer: the New Small Wheels (NSW). In order to achieve the goal of precision tracking at a hit rate of about 15 kHz/cm$^2$ at the inner radius of the NSW, large area Micromegas quadruplets with 100 \microns spatial resolution per plane have been produced. [...]
arXiv:2105.13709.-
2022-03-01 - 43 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1026 (2022) 166143
Fulltext: 1-s2.0-S0168900221010330-main - PDF; 2105.13709 - PDF;
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4.
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5.
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Geant4 simulation of the n_TOF-EAR2 neutron beam: Characteristics and prospects
/ Lerendegui-Marco, J (Seville U.) ; Lo Meo, S (ENEA, Bologna ; INFN, Bologna) ; Guerrero, C (Seville U.) ; Cortés-Giraldo, M A (Seville U.) ; Massimi, C (INFN, Bologna ; Bologna U.) ; Quesada, J M (Seville U.) ; Barbagallo, M (INFN, Bari) ; Colonna, N (INFN, Bari) ; Mancusi, D (Saclay) ; Mingrone, F (Bologna U.) et al.
/n_TOF
The characteristics of the neutron beam at the new n_TOF-EAR2 facility have been simulated with the Geant4 code with the aim of providing useful data for both the analysis and planning of the upcoming measurements. The spatial and energy distributions of the neutrons, the resolution function and the in-beam $ \gamma$ -ray background have been studied in detail and their implications in the forthcoming experiments have been discussed. [...]
2016
- Published in : Eur. Phys. J. A 52 (2016) 100
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7.
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New insights on fission of $^{235}$U induced by high energy neutrons
/ n_TOF Collaboration
The $^{235}$U(n,f) reaction cross section was measured relative to neutron-proton elastic scattering for the first time in the energy region from 10 MeV to 440 MeV at the CERN n_TOF facility, extending the upper limit of the only previous measurement in the literature by more than 200 MeV. [...]
arXiv:2403.11711.
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19 p.
Fulltext
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8.
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Positron production using a 9 MeV electron linac for the GBAR experiment
/ Charlton, M. (Swansea U.) ; Choi, J.J. (Seoul Natl. U., Dept. Phys. Astron.) ; Chung, M. (UNIST, Ulsan) ; Cladé, P. (Paris, Lab. Kastler Brossel) ; Comini, P. (IRFU, Saclay) ; Crépin, P.P. (Paris, Lab. Kastler Brossel) ; Crivelli, P. (Zurich, ETH) ; Dalkarov, O. (Lebedev Inst.) ; Debu, P. (IRFU, Saclay) ; Dodd, L. (Swansea U.) et al.
For the GBAR (Gravitational Behaviour of Antihydrogen at Rest) experiment at CERN's Antiproton Decelerator (AD) facility we have constructed a source of slow positrons, which uses a low-energy electron linear accelerator (linac). The driver linac produces electrons of 9 MeV kinetic energy that create positrons from bremsstrahlung-induced pair production. [...]
arXiv:2006.05966.-
2021-01-01 - 33 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 985 (2021) 164657
Fulltext: PDF;
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X-ray imaging with Micromegas detectors with optical readout
/ Cools, A. (IRFU, Saclay) ; Aune, S. (IRFU, Saclay) ; Beau, F. (Saclay) ; Brunbauer, F.M. (CERN) ; Benoit, T. (IRFU, Saclay) ; Desforge, D. (IRFU, Saclay) ; Ferrer-Ribas, E. (IRFU, Saclay) ; Kallitsopoulou, A. (IRFU, Saclay) ; Malgorn, C. (Saclay) ; Oliveri, E. (CERN) et al.
In the last years, optical readout of Micromegas gaseous detectors has been achieved by implementing a Micromegas detector on a glass anode coupled to a CMOS camera. Effective X-ray radiography was demonstrated using integrated imaging approach. [...]
arXiv:2303.17444.-
2023-06-16 - 6 p.
- Published in : JINST 18 (2023) C06019
Fulltext: PDF;
In : 7th International Conference on Micro Pattern Gaseous Detectors 2022 (MPGD 2022), Rehovot, Israel, 11 - 16 Dec 2022, pp.C06019
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