M. Garattini
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View article: Crystal channeling investigations at medical synchrotron regimes
Crystal channeling investigations at medical synchrotron regimes Open
An experimental setup to investigate ion channeling in the hundreds MeV/u energy range is described. A short bent crystal, aligned to the incoming beam by an angular actuator, should deflect ions into a single plane pixel detector used to …
View article: Multiple scattering of channeled and non-channeled positively charged particles in bent monocrystalline silicon
Multiple scattering of channeled and non-channeled positively charged particles in bent monocrystalline silicon Open
View article: Feasibility of crystal-assisted collimation in the CERN accelerator complex
Feasibility of crystal-assisted collimation in the CERN accelerator complex Open
Bent silicon crystals mounted on high-accuracy angular actuators were installed in the CERN Super Proton Synchrotron (SPS) and extensively tested to assess the feasibility of crystal-assisted collimation in circular hadron colliders. The a…
View article: Double-crystal measurements at the CERN SPS
Double-crystal measurements at the CERN SPS Open
View article: Channeling efficiency reduction in high dose neutron irradiated silicon crystals for high energy and high intensity beam collimation and extraction
Channeling efficiency reduction in high dose neutron irradiated silicon crystals for high energy and high intensity beam collimation and extraction Open
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 possibi…
View article: Track reconstruction of particle interactions in long crystals with large bending
Track reconstruction of particle interactions in long crystals with large bending Open
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 stu…
View article: CERN Yellow Reports: Monographs, Vol. 4 (2020): LHC fixed target experiments: Report from the LHC Fixed Target Working Group of the CERN Physics Beyond Colliders Forum
CERN Yellow Reports: Monographs, Vol. 4 (2020): LHC fixed target experiments: Report from the LHC Fixed Target Working Group of the CERN Physics Beyond Colliders Forum Open
Several fixed-target experiments at the LHC are being proposed and actively studied. Splitting of beam halo from the core by means of a bent crystal combined with a second bent crystal after the target has been suggested in order to study …
View article: Observation of strong reduction of multiple scattering for channeled particles in bent crystals
Observation of strong reduction of multiple scattering for channeled particles in bent crystals Open
View article: Angular asymmetry of the nuclear interaction probability of high energy particles in short bent crystals
Angular asymmetry of the nuclear interaction probability of high energy particles in short bent crystals Open
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 depen…
View article: Reduction of multiple scattering of high-energy positively charged particles during channeling in single crystals
Reduction of multiple scattering of high-energy positively charged particles during channeling in single crystals Open
We present the experimental observation of the reduction of multiple scattering of high-energy positively charged particles during channeling in single crystals. According to our measurements the rms angle of multiple scattering in the pla…
View article: Beam steering performance of bent silicon crystals irradiated with high-intensity and high-energy protons
Beam steering performance of bent silicon crystals irradiated with high-intensity and high-energy protons Open
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 t…
View article: Septum shadowing by means of a bent crystal to reduce slow extraction beam loss
Septum shadowing by means of a bent crystal to reduce slow extraction beam loss Open
The flux of high-energy protons slow-extracted from the CERN Super Proton Synchrotron (SPS) is limited by the induced radioactivity caused by the beam loss intrinsic to the extraction process. Methods to substantially increase the efficien…
View article: Double-crystal setup measurements at the CERN SPS
Double-crystal setup measurements at the CERN SPS Open
In this paper, we discuss an experimental layout for the two-crystals scenario at the Super Proton Synchrotron (SPS) accelerator. The research focuses on a fixed target setup at the circulating machine in a frame of the Physics Beyond Coll…
View article: Commissioning and operation of the Cherenkov detector for proton Flux Measurement of the UA9 experiment
Commissioning and operation of the Cherenkov detector for proton Flux Measurement of the UA9 experiment Open
View article: Demonstration of Loss Reduction Using a Thin Bent Crystal to Shadow an Electrostatic Septum During Resonant Slow Extraction
Demonstration of Loss Reduction Using a Thin Bent Crystal to Shadow an Electrostatic Septum During Resonant Slow Extraction Open
A proof-of-principle experiment demonstrating the feasibility of using a thin, bent crystal aligned upstream of an extraction septum (ES) to increase the efficiency of the third-integer resonant slow extraction process has been carried out…
View article: Crystal for Slow Extraction Loss-Reduction of the SPS Electrostatic Septum
Crystal for Slow Extraction Loss-Reduction of the SPS Electrostatic Septum Open
The use of a bent crystal was investigated in order to reduce the losses at the CERN Super Proton Synchrotron (SPS) electrostatic septa (ZS) during the slow extraction of 400 GeV protons toward the North Area. The crystal, installed a few …
View article: Dechanneling of high energy particles in a long bent crystal
Dechanneling of high energy particles in a long bent crystal Open
Experimental results on deflection of a 180 GeV/c $\\pi^+$-meson beam by a 23 mm long bent silicon crystal are\nanalyzed to study the dechanneling process of particles due to multiple scattering. A new approach for the\ndetermination of co…
View article: Study of inelastic nuclear interactions of 400 GeV/c protons in bent silicon crystals for beam steering purposes
Study of inelastic nuclear interactions of 400 GeV/c protons in bent silicon crystals for beam steering purposes Open
View article: Comprehensive study of beam focusing by crystal devices
Comprehensive study of beam focusing by crystal devices Open
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. The studies have been perform…
View article: Focusing of a particle beam by a crystal device with a short focal length
Focusing of a particle beam by a crystal device with a short focal length Open
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 b…
View article: Observation of channeling in bent crystals at the CERN LHC
Observation of channeling in bent crystals at the CERN LHC Open
The feasibility of crystal-assisted collimation is being investigated for improvements of the LHC collimation system, as a part of the future high luminosity upgrade of the CERN LHC (HL-LHC). Two high-accuracy goniometers, each equipped wi…
View article: High-efficiency deflection of high energy protons due to channeling along the 〈110〉 axis of a bent silicon crystal
High-efficiency deflection of high energy protons due to channeling along the 〈110〉 axis of a bent silicon crystal Open
View article: Observation of channeling for 6500 GeV/ c protons in the crystal assisted collimation setup for LHC
Observation of channeling for 6500 GeV/ c protons in the crystal assisted collimation setup for LHC Open
View article: Corrigendum to “Observation of strong leakage reduction in crystal assisted collimation of the SPS beam” [Phys. Lett. B 748 (2015) 451–454]
Corrigendum to “Observation of strong leakage reduction in crystal assisted collimation of the SPS beam” [Phys. Lett. B 748 (2015) 451–454] Open
View article: Observation of strong leakage reduction in crystal assisted collimation of the SPS beam
Observation of strong leakage reduction in crystal assisted collimation of the SPS beam Open
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 coll…
View article: Observation of nuclear dechanneling length reduction for high energy protons in a short bent crystal
Observation of nuclear dechanneling length reduction for high energy protons in a short bent crystal Open
Deflection of 400 GeV/c protons by a short bent silicon crystal was studied at the CERN SPS. It was shown that the dechanneling probability increases while the dechanneling length decreases with an increase of incident angles of particles …