1.
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Optimization of the crystal assisted collimation of the SPS beam
/ Scandale, W (Orsay, LAL ; INFN, Rome ; CERN) ; Arduini, G (CERN) ; Butcher, M (CERN) ; Cerutti, F (CERN) ; Gilardoni, S (CERN) ; Lari, L (CERN ; Valencia U., IFIC) ; Lechner, A (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mereghetti, A (CERN) et al.
2013
- Published in : Phys. Lett. B 726 (2013) 182-186
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2.
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Comprehensive study of beam focusing by crystal devices
/ 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.
This paper is devoted to an experimental study of focusing and defocusing positively charged particle beams with the help of specially bent single crystals. Four crystals have been fabricated for this purpose. [...]
2018 - 11 p.
- Published in : Phys. Rev. Accel. Beams 21 (2018) 014702
Fulltext: PDF;
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3.
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Comparative results on the deflection of positively and negatively charged particles by multiple volume reflections in a multi-strip silicon deflector
/ Scandale, W (CERN ; Orsay, LAL ; INFN, Rome) ; Arduini, G (CERN) ; Butcher, M (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Lechner, A (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mereghetti, A (CERN) et al.
Bent silicon crystals in channeling mode are already used for beam extraction and collimation in particle accelerators. Volume reflection of beam particles is more efficient than beam channeling, however, the mean deflection angle is rather small. [...]
2015 - 6 p.
- Published in : JETP Lett. 101 (2015) 679-684
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4.
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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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5.
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Observation of strong leakage reduction in crystal assisted collimation of the SPS beam
/ Scandale, W (CERN ; Orsay, LAL ; INFN, Rome) ; Arduini, G (CERN) ; Butcher, M (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Lechner, A (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mereghetti, A (CERN) et al.
In ideal two-stage collimation systems, the secondary collimator–absorber should have its length sufficient to exclude practically the exit of halo particles with large impact parameters. In the UA9 experiments on the crystal assisted collimation of the SPS beam a 60 cm long tungsten bar is used as a secondary collimator–absorber which is insufficient for the full absorption of the halo protons. [...]
2015 - 4 p.
Corrigendum: PDF; Elsevier Open Access article: PDF;
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6.
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Strong reduction of the off-momentum halo in crystal assisted collimation of the SPS beam
/ Scandale, W (CERN ; Orsay, LAL ; INFN, Rome) ; Arduini, G (CERN) ; Assmann, R (CERN) ; Cerutti, F (CERN) ; Gilardoni, S (CERN) ; Laface, E (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Metral, E (CERN) ; Mirarchi, D (CERN) et al.
A study of crystal assisted collimation has been continued at the CERN SPS for different energies of stored beams using 120 GeV/c and 270 GeV/c protons and Pb ions with 270 GeV/c per charge. A bent silicon crystal used as a primary collimator deflected halo particles using channeling and directing them into the tungsten absorber. [...]
2012 - 6 p.
- Published in : Phys. Lett. B 714 (2012) 231-236
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7.
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Observation of channeling for 6500 GeV/ c protons in the crystal assisted collimation setup for LHC
/ Scandale, W (CERN ; Orsay, LAL ; INFN, Rome) ; Arduini, G (CERN) ; Butcher, M (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Lechner, A (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) et al.
Two high-accuracy goniometers equipped with two bent silicon crystals were installed in the betatron cleaning insertion of the CERN Large Hadron Collider (LHC) during its long shutdown. First beam tests were recently performed at the LHC with 450 GeV/ c and 6500 GeV/ c stored proton beams to investigate the feasibility of beam halo collimation assisted by bent crystals. [...]
2016 - 5 p.
- Published in : Phys. Lett. B 758 (2016) 129-133
Elsevier Open Access article: PDF;
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8.
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High-efficiency deflection of high energy protons due to channeling along the 〈110〉 axis of a bent silicon crystal
/ Scandale, W (CERN ; Orsay, LAL ; INFN, Rome) ; Arduini, G (CERN) ; Butcher, M (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Lechner, A (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) ; Montesano, S (CERN) et al.
A deflection efficiency of about 61% was observed for 400 GeV/c protons due to channeling, most strongly along the 〈110〉 axis of a bent silicon crystal. It is comparable with the deflection efficiency in planar channeling and considerably larger than in the case of the 〈111〉 axis. [...]
2016 - 6 p.
- Published in : Phys. Lett. B 760 (2016) 826-831
Elsevier Open Access article: PDF;
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9.
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Measurements of multiple scattering of high energy protons in bent silicon crystals
/ Scandale, W (CERN ; Orsay, LAL ; INFN, Rome) ; Arduini, G (CERN) ; Butcher, M (CERN) ; Cerutti, F (CERN) ; Garattini, M (CERN) ; Gilardoni, S (CERN) ; Lechner, A (CERN) ; Losito, R (CERN) ; Masi, A (CERN) ; Mirarchi, D (CERN) et al.
The ordered positions of atoms in crystals give a reason to study multiple Coulomb scattering of high energy charged particles within them. In addition, the accurate representation of multiple scattering of high energy protons in a bent crystal is important for studies of crystal assisted collimation at the SPS and the LHC. [...]
2017 - 5 p.
- Published in : Nucl. Instrum. Methods Phys. Res., B 402 (2017) 291-295
In : 7h International Conference on Charged & Neutral Particles Channeling Phenomena, Sirmione, Italy, 23 - 30 Sep 2016, pp.291
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10.
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Observation of channeling in bent crystals at the CERN LHC
/ Rossi, Roberto (CERN ; INFN, Rome ; U. Rome La Sapienza (main)) ; Scandale, Walter (CERN) ; Arduini, Gianluigi (CERN) ; Butcher, Mark (CERN) ; Cerutti, Francesco (CERN) ; Garattini, Marco (CERN) ; Gilardoni, Simone (CERN) ; Lechner, Anton (CERN) ; Losito, Roberto (CERN) ; Masi, Alessandro (CERN) et al.
SISSA, 2016 - 4 p.
- Published in : PoS ICHEP2016 (2016) 867
PoS Open Access Article: PDF; External link: PoS server
In : 38th International Conference on High Energy Physics, Chicago, IL, USA, 03 - 10 Aug 2016, pp.867
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