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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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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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4.
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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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5.
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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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6.
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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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7.
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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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8.
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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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9.
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Angular asymmetry of the nuclear interaction probability of high energy particles in short bent crystals
/ Scandale, W (CERN) ; Cerutti, F (CERN) ; Esposito, L S (CERN) ; Garattini, M (CERN ; Imperial Coll., London) ; Gilardoni, S (CERN) ; Natochii, A (CERN ; Orsay, LAL ; Taras Shevchenko U.) ; Rossi, R (CERN) ; Smirnov, G I (CERN ; Dubna, JINR) ; Zhovkovska, V (CERN ; Taras Shevchenko U.) ; Galluccio, F (INFN, Naples ; Naples U.) et al.
The rate of inelastic nuclear interactions in a short bent silicon crystal was precisely measured for the first time using a 180 GeV/c positive hadron beam produced in the North Experimental Area of the CERN SPS. An angular asymmetry dependence on the crystal orientation in the vicinity of the planar channeling minimum has been observed. [...]
2020 - 5 p.
- Published in : Eur. Phys. J. C 80 (2020) 27
External link: Fulltext
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10.
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Beam steering performance of bent silicon crystals irradiated with high-intensity and high-energy protons
/ Scandale, W (CERN) ; Calviani, M (CERN) ; D'Andrea, M (CERN) ; Esposito, L S (CERN) ; Garattini, Marco (CERN ; Imperial Coll., London) ; Gilardoni, S (CERN) ; Montesano, S (CERN) ; Natochii, A (CERN ; Orsay, LAL ; Taras Shevchenko U.) ; Rossi, R (CERN) ; Smirnov, G I (CERN ; Dubna, JINR) et al.
Beam steering performance of bent silicon crystals irradiated with high-intensity and high-energy protons has been studied. In particular, crystals of the type used for collimation and extraction purposes in the Large Hadron Collider and the Super Proton Synchrotron at CERN have been irradiated at the HiRadMat CERN facility with $2.5 \times 10^{13}$ 440 GeV/c protons, with a pulse length of 7.2 $\upmu $s. [...]
2019 - 5 p.
- Published in : Eur. Phys. J. C 79 (2019) 933
Fulltext from SCOAP3: PDF;
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