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1.
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Multiple scattering of positively charged particles moving near the (111) plane in a silicon single crystal
/ Scandale, W (Imperial Coll., London) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Redaelli, S (CERN) ; Smirnov, G (CERN) et al.
The article is devoted to the study of the suppression of multiple scattering of positively charged particles with momenta of 180 GeV/c and 400 GeV/c passing through bent single crystals of silicon at small angles to the plane (111) both in channeling mode and in the above-barrier state. For the first time, the suppression of the effect of multiple scattering of non-channeling particles passing at a small angle to one of the planes of a silicon single crystal was observed. [...]
Germany : Springer Nature, 2024 - 6 p.
- Published in : Eur. Phys. J. Plus 139 (2024) 1041
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2.
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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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3.
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4.
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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
Fulltext: PDF;
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5.
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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
Fulltext: PDF;
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6.
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Double-crystal measurements at the CERN SPS
/ Scandale, W. (CERN ; Imperial Coll., London ; INFN, Rome) ; Arduini, G. (CERN) ; Cerutti, F. (CERN) ; D'Andrea, M. (CERN ; Padua U.) ; Esposito, L.S. (CERN) ; Garattini, M. (CERN ; Imperial Coll., London) ; Gilardoni, S. (CERN) ; Mirarchi, D. (CERN ; Manchester U.) ; Montesano, S. (CERN) ; Natochii, A. (CERN ; IJCLab, Orsay ; Taras Shevchenko U.) et al.
The UA9 setup, installed in the Super Proton Synchrotron (SPS) at CERN, was exploited for a proof of principle of the double-crystal scenario, proposed to measure the electric and the magnetic moments of short-lived baryons in a high-energy hadron collider, such as the Large Hadron Collider (LHC). Linear and angular actuators were used to position the crystals and establish the required beam configuration. [...]
arXiv:2103.14681; CERN-PBC-Notes-2021-024.-
2021-11-01 - 25 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 1015 (2021) 165747
Fulltext: PDF; Fulltext from publisher: PDF;
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7.
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Focusing of a particle beam by a crystal device with a short focal length
/ Scandale, W (CERN) ; Arduini, G (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) ; Petrucci, S (CERN) ; Redaelli, S (CERN) et al.
Recent discussions about accelerators in high energy physics identified several challenges for the future, where it is necessary to focus particle beams over a distance of a few cm. In this paper, we investigate the focusing of particles by a new crystal device having such a capability. [...]
2018 - 3 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 414 (2018) 104-106
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8.
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The UA9 setup for the double-crystal experiment in CERN-SPS
/ CERN UA 009 collaboration
Experiments to measure the electric and the magnetic moments of short-lived baryons using an internal target and two bent crystals in the vicinity of one of the existing LHC detectors were recently proposed, in the frame of the Physics Beyond Colliders Working Group at CERN. Investigating fixed-target physics in the LHC with in-vacuum solid targets is an unprecedented challenge. [...]
CERN-PBC-Notes-2021-022.-
2020 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., A 975 (2020) 164175
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9.
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Observation of strong reduction of multiple scattering for channeled particles in bent crystals
/ Scandale, W (CERN) ; Arduini, G (CERN) ; Cerutti, F (CERN) ; Garattini, M ; Gilardoni, S (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) ; Redaelli, S (CERN) et al.
Strong reduction of multiple scattering for channeled particles has been observed in an experiment on the deflection of a 180 GeV/c π+ -meson beam by bent silicon crystals. The RMS deflections due to multiple scattering for the channeled particles were about six times smaller than for non-channeled ones. [...]
2020 - 4 p.
- Published in : Phys. Lett. B 804 (2020) 135396
Fulltext from publisher: PDF;
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10.
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Channeling efficiency in a target-crystal assembly
/ Scandale, W (CERN) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN ; Imperial Coll., London) ; Gilardoni, S (CERN) ; Montesano, S (CERN) ; Natochii, A (CERN ; LPGP, Orsay ; Taras Shevchenko U.) ; Rossi, R (CERN) ; Smirnov, G I (CERN ; Dubna, JINR) ; Zhovkovska, V (CERN ; Taras Shevchenko U.) et al.
In view of possible future fixed target experiments requiring precisely steered charged particle beams, the UA9 Collaboration has undertaken experimental studies of the use of bent silicon crystals for this purpose. The channeling efficiency of positively charged particles inside the crystalline lattice has been investigated in detail for a setup with a tungsten target installed in front of the crystal. [...]
2020 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 467 (2020) 118-122
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