Alessio Mereghetti
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View article: Characterization of a permanent magnetic dipolar system for the FOOT experiment
Characterization of a permanent magnetic dipolar system for the FOOT experiment Open
The FOOT (FragmentatiOn Of Target) experiment aims to measure double differential fragmentation cross-sections for applications in Particle Therapy and space radiation protection. A critical component of the apparatus is its magnetic spect…
View article: TOFpRad: a novel proton radiography prototype based on Time Of Flight measurements
TOFpRad: a novel proton radiography prototype based on Time Of Flight measurements Open
Ion beam therapy effectively treats radiation-resistant and deeply located tumors but requires meticulous planning and wide safety margins imposed by current technology. Proton transmission imaging, using protons instead of x-rays for imag…
View article: Development and performance assessment of the BGO calorimeter module for the FOOT experiment
Development and performance assessment of the BGO calorimeter module for the FOOT experiment Open
FOOT (FragmentatiOn Of Target) is a nuclear physics experiment currently under construction that will measure differential cross sections for the production of secondary fragments induced by the interactions of proton and ion beams, up to …
View article: Advancing Radiobiology: Investigating the Effects of Photon, Proton, and Carbon-Ion Irradiation on PANC-1 Cells in 2D and 3D Tumor Models
Advancing Radiobiology: Investigating the Effects of Photon, Proton, and Carbon-Ion Irradiation on PANC-1 Cells in 2D and 3D Tumor Models Open
Introduction: Pancreatic cancer (PC) is one of the most aggressive and lethal malignancies, calling for enhanced research. Pancreatic ductal adenocarcinoma (PDAC) represents 70–80% of all cases and is known for its resistance to convention…
Size-Sorted Superheated Nanodroplets for Dosimetry and Range Verification of Carbon-Ion Radiotherapy Open
Nanodroplets have demonstrated potential for the range detection of hadron radiotherapies. Our formulation uses superheated perfluorobutane (C4F10) stabilized by a poly(vinyl-alcohol) shell. High-LET (linear energy transfer) particles vapo…
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: Collimation of HL-LHC Beams
Collimation of HL-LHC Beams Open
High-performance collimation systems are essential for operating modern hadron accelerators with large beam intensities efficiently and safely. In particular, at the LHC the collimation system ensures a clean disposal of beam halos in the …
View article: Simulations and measurements of the transverse mode coupling instability in the LHC
Simulations and measurements of the transverse mode coupling instability in the LHC Open
The High Luminosity (HL) upgrade of the Large Hadron Collider (LHC) will increase the peak luminosity at the experiments by more than a factor of 5 with respect to the LHC design value. To achieve this goal, among the upgrade of several be…
View article: Characterisation of a low-momentum high-rate muon beam monitor for the FAMU experiment at the CNAO-XPR beam facility
Characterisation of a low-momentum high-rate muon beam monitor for the FAMU experiment at the CNAO-XPR beam facility Open
The FAMU experiment aims at an indirect measurement of the Zemach radius of the proton. The measurement is carried out on muonic hydrogen atoms produced through the low-momentum (50-60 MeV/c) muon beam a the RIKEN-RAL negative muon facilit…
View article: Characterization of 150 μm thick silicon microstrip prototype for the FOOT experiment
Characterization of 150 μm thick silicon microstrip prototype for the FOOT experiment Open
The goals of the FOOT (FragmentatiOn Of Target) experiment are to measure the proton double differential fragmentation cross-section on H, C, O targets at beam energies of interest for hadrontherapy (50–250 MeV for protons and 50–400 MeV/u…
Nonlinear dynamics of proton beams with hollow electron lens in the CERN high-luminosity LHC Open
The design stored beam energy in the CERN high-luminosity large hadron collider (HL-LHC) upgrade is about 700 MJ, with about 36 MJ in the beam tails, according to estimates based on scaling considerations from measurements at the LHC. Such…
Advanced assessment of beam-induced background at a muon collider Open
Renewed international interest in muon colliders motivates the continued investigation of the impacts of beam-induced background on detector performance. This continues the effort initiated by the Muon Accelerator Program and carried out u…
HL-LHC Beam Dynamics with Hollow Electron Lenses Open
Each of the two proton beams in the High-Luminosity Large Hadron Collider (HL-LHC) will carry a total energy of 720 MJ. One concern for machine protection is the energy stored in the transverse beam tails, estimated to potentially reach up…
Conceptual design of an off-momentum collimation system in the CERN Super Proton Synchrotron for High-Luminosity Large Hadron Collider proton beams Open
The CERN accelerator complex is undergoing an upgrade in order to meet the requirements of the High-Luminosity Large Hadron Collider (HL-LHC). One of the key needs is to increase the intensity of beams injected into the LHC from the curren…
View article: MD2193 – Impedance Measurements of the TCSPM Prototype Collimator
MD2193 – Impedance Measurements of the TCSPM Prototype Collimator Open
In view of the HL–LHC project, it is planned to exchange 9 out 11 of the LHC secondary collimators in IR7, made of graphite, with low–impedance ones. In order to optimise the new design, a prototype of collimator with a selection of low–im…
View article: MD2191 – β∗–Reach: 2017 IR7 Collimation Hierarchy Limit and Impedance
MD2191 – β∗–Reach: 2017 IR7 Collimation Hierarchy Limit and Impedance Open
This report summarises the results of MD2191 about the hierarchy limit of the LHC collimation system in IR7 at 6.5 TeV and its impedance. The activity was carried out during MD block 3 of 2017, on the night between 17th and 18th September.…
Characterization of the beam scraping system of the CERN Super Proton Synchrotron Open
The Super Proton Synchrotron at CERN is equipped with a scraping system for halo cleaning at beam transfer to the Large Hadron Collider. The system is composed of movable graphite blades mechanically swept through the beam to remove tails …
View article: A flexible tool for Beam Induced Background Simulations at a Muon Collider
A flexible tool for Beam Induced Background Simulations at a Muon Collider Open
A Muon Collider represents a very interesting possibility for a future machine to explore the energy frontier in particle physics.However, to reach the needed luminosity, beam intensities of the order of $10^{9-11}$ muons per bunch are nee…
Achromatic telescopic squeezing scheme and by-products: From concept to validation Open
The achromatic telescopic squeezing (ATS) scheme has brought an essential conceptual foundation to the HL-LHC project, making possible a strong and clean (achromatic) reduction of β*, an important parameter with respect to which several HL…
Impedance reduction for LHC collimators Open
The LHC at CERN is equipped with a sophisticated collimation system, aimed at protecting superconducting magnets against quenches in case of losses from the circulating beams. The collimation system is one of the major contributors to the …
View article: Different approaches for minimising proton beam losses on the 11 T dipole in the IR7 dispersion suppressor
Different approaches for minimising proton beam losses on the 11 T dipole in the IR7 dispersion suppressor Open
The High Luminosity Large Hadron Collider (HL–LHC) project aims at increasing the integrated luminosity by a factor of 10 beyond the LHC design value. With the increased intensities of the proton beams expected for HL–LHC, the losses on su…
Monte Carlo Driven MDI Optimization at a Muon Collider Open
A Muon Collider represents a very interesting possibility for a future machine to explore the energy frontier in particle physics. However, to reach the needed luminosity, beam intensities of the order of 10⁹–10¹² muons per bunch are neede…
View article: Modeling Particle Stability Plots for Accelerator Optimization Using Adaptive Sampling
Modeling Particle Stability Plots for Accelerator Optimization Using Adaptive Sampling Open
One key aspect of accelerator optimization is to maximize the dynamic aperture (DA) of a ring. Given the number of adjustable parameters and the compute-intensity of DA simulations, this task can benefit significantly from efficient search…
View article: Release of Crystal Routine for Multi-Turn Proton Simulations within SixTrack v5
Release of Crystal Routine for Multi-Turn Proton Simulations within SixTrack v5 Open
Crystal collimation is studied as a possible scheme to further improve the efficiency of ion collimation at the High Luminosity Large Hadron Collider (HL-LHC), as well as for possible applications in the CERN program of Physics Beyond Coll…
View article: Reducing Beam-Related Background on Forward Physics Detectors Using Crystal Collimation at the Large Hadron Collider1
Reducing Beam-Related Background on Forward Physics Detectors Using Crystal Collimation at the Large Hadron Collider1 Open
Beam collimation in high-energy colliders is customarily carried out by means of massive amorphous absorbers surrounding the circulating beam. Several studies were performed in the last decades to establish an innovative collimation techni…
View article: Dynamic simulations in SixTrack
Dynamic simulations in SixTrack Open
The DYNK module allows element settings in SixTrack to be changed on a turn-by-turn basis. This document contains a technical description of the DYNK module in SixTrack. It is mainly intended for a developer or advanced user who wants to m…