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11.
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Track reconstruction and analysis of particle interactions in short bent crystals
/ Rossi, R (CERN ; Imperial Coll., London) ; Esposito, L S (CERN) ; Pesaresi, M (Imperial Coll., London) ; Hall, G (Imperial Coll., London) ; Scandale, W (Imperial Coll., London ; INFN, Rome)
Measurements of the interaction of positively charged particles with bent crystals wereobtained by developing a new and consolidated analysis method, for the use of UA9 collaboration.The method was deployed to characterize crystals with a length of a few mm along the beamdirection and a bending angle in the order of 10 μrad to 100 μrad, typicallyexploited in the CERN accelerators. To assess their properties and quality, the crystals havebeen investigated in the Super Proton Synchrotron North Area with a beam of mixed hadrons at180 GeV. [...]
2023 - 18 p.
- Published in : JINST 18 (2023) P06027
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12.
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13.
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HL-LHC layout for fixed-target experiments in ALICE based on crystal-assisted beam halo splitting
/ Patecki, Marcin (Warsaw U. of Tech.) ; Mirarchi, Daniele (CERN) ; Redaelli, Stefano (CERN) ; Fomin, Alex (CERN) ; Hadjidakis, Cynthia (IJCLab, Orsay) ; Galluccio, Francesca (INFN, Naples) ; Scandale, Walter (Imperial Coll., London ; INFN, Rome)
The Large Hadron Collider (LHC) at the European Organization for Nuclear Research (CERN) is the world's largest and most powerful particle accelerator colliding beams of protons and lead ions at energies up to 7 ZTeV, Z is the atomic number. ALICE is one of the detector experiments optimised for heavy-ion collisions. [...]
arXiv:2210.13299.-
2023-11-18 - 6 p.
- Published in : Eur. Phys. J. C 83 (2023) 1053
Fulltext: 2210.13299 - PDF; document - PDF;
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14.
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Dechanneling of high energy particles in a long bent crystal
/ Scandale, W (CERN) ; Arduini, G (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN ; Imperial Coll., London) ; Gilardoni, S (CERN) ; Lechner, A (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) et al.
Experimental results on deflection of a 180 GeV/c $\pi^+$-meson beam by a 23 mm long bent silicon crystal are
analyzed to study the dechanneling process of particles due to multiple scattering. A new approach for the
determination of contributions from atomic nuclei and electrons to the multiple scattering using the experimental data for random crystal orientations is suggested. [...]
2019 - 4 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 438 (2019) 38-41
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15.
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16.
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Multiple scattering of channeled and non-channeled positively charged particles in bent monocrystalline silicon
/ Scandale, W. (CERN) ; Arduini, G. (CERN) ; Cerutti, F. (CERN) ; Esposito, L.S. (CERN) ; Garattini, M. (CERN) ; Gilardoni, S. (CERN) ; Losito, R. (CERN) ; Masi, A. (CERN) ; Mirarchi, D. (CERN) ; Montesano, S. (CERN) et al.
We present the results of an experimental study of multiple scattering of positively charged high energy particles in bent samples of monocrystalline silicon. This work confirms the recently discovered effect of a strong reduction in the rms multiple scattering angle of particles channeled in the silicon (111) plane. [...]
arXiv:2201.09655.-
2022-07-14 - 18 p.
- Published in : Eur. Phys. J. Plus 137 (2022) 811
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17.
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Crystal Collimation of 20 MJ Heavy-Ion Beams at the HL-LHC
/ D'Andrea, Marco (CERN) ; Bruce, Roderik (CERN) ; Di Castro, Mario (CERN) ; Galluccio, Francesca (INFN, Naples) ; Lamas Garcia, Inigo (CERN) ; Masi, Alessandro (CERN) ; Mirarchi, Daniele (CERN) ; Nevay, Laurence (Royal Holloway, U. of London ; CERN) ; Redaelli, Stefano (CERN) ; Rossi, Roberto (CERN) et al.
The concept of crystal collimation at the Large Hadron Collider (LHC) relies on the use of bent crystals that can deflect halo particles by a much larger angle than the standard multi-stage collimation system. Following an extensive campaign of studies and performance validations, a number of crystal collimation tests with Pb ion beams were performed in 2018 at energies up to 6.37 Z TeV. [...]
2021 - 4 p.
- Published in : 10.18429/JACoW-IPAC2021-WEPAB023
Fulltext: PDF;
In : 12th International Particle Accelerator Conference (IPAC 2021), Online, 24 - 28 May 2021, pp.2644-2647
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18.
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Channeling efficiency reduction in high dose neutron irradiated silicon crystals for high energy and high intensity beam collimation and extraction
/ Scandale, W (CERN) ; D'Andrea, M (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN ; Imperial Coll., London) ; Guillermain, E (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) ; Natochii, A (CERN ; Orsay, LAL) ; Rossi, R (CERN) ; I Smirnov, G (CERN ; Dubna, JINR) et al.
The channeling process in bent silicon crystals are used since '70s to manipulate beams of high energy particles. During the last decade, several studies and experiments carried out by the UA9 Collaboration at CERN demonstrated the possibility to use bent crystals for beam collimation, extraction, focusing and splitting in particle accelerators. [...]
2021 - 11 p.
- Published in : JINST 16 (2021) P08015
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19.
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Track reconstruction of particle interactions in long crystals with large bending
/ Rossi, R (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN ; Imperial Coll., London) ; James, T O (Imperial Coll., London) ; Pesaresi, M (Imperial Coll., London) ; Hall, G (Imperial Coll., London) ; Scandale, W (CERN ; Imperial Coll., London)
The possibility to deflect hadron beams precisely through angles of multi-mrad is important for several future applications, and magnets are not suitable for this purpose. Crystal channeling provides a means to do this, but is not well studied for such deflections. [...]
2021 - 14 p.
- Published in : JINST 16 (2021) P05017
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20.
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Heavy-flavour studies with a high-luminosity fixed-target experiment at the LHC
/ Trzeciak, Barbara (Prague, Tech. U.) ; Brodsky, S.J. (SLAC) ; Cavoto, G. (INFN, Rome ; Rome U.) ; Da Silva, C. (Los Alamos) ; Echevarria, M.G. (UCM, Madrid, Dept. Phys.) ; Ferreiro, E.G. (Santiago de Compostela U. ; Santiago de Compostela U., IGFAE) ; Hadjidakis, C. (IJCLab, Orsay) ; Haque, R. (Warsaw U. of Tech.) ; Hřivnáčová, I. (IJCLab, Orsay) ; Kikoła, D. (Warsaw U. of Tech.) et al.
Extraction of the multi-TeV proton and lead LHC beams with a bent crystal or by using an internal gas target allows one to perform the most energetic fixed-target experiment ever. $pp$, pd and $p$A collisions at $\sqrt{s_{\rm{NN}}}$ = 115 GeV and Pb$p$ and PbA collisions at $\sqrt{s_{\rm{NN}}}$ = 72 GeV can be studied with high precision and modern detection techniques over a broad rapidity range. [...]
arXiv:2104.10926.-
2021-09-01 - 6 p.
- Published in : PoS HardProbes2020 (2021) 190
Fulltext: 2104.10926 - PDF; document - PDF; External link: Preprint
In : 10th International Conference on Hard and Electromagnetic Probes of High-Energy Nuclear Collisions : Hard Probes 2020 (HP2020), Austin, Texas, United States, 31 May - 5 June 2020, pp.190
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