A5055534438- Particle Accelerators and Free-Electron Lasers
- Superconducting Materials and Applications
- Particle accelerators and beam dynamics
- Particle physics theoretical and experimental studies
- Particle Detector Development and Performance
- Gyrotron and Vacuum Electronics Research
- Quantum chaos and dynamical systems
- Distributed and Parallel Computing Systems
- Magnetic confinement fusion research
- High-Energy Particle Collisions Research
- Radiation Therapy and Dosimetry
- Dark Matter and Cosmic Phenomena
- Numerical methods for differential equations
- Neutrino Physics Research
- Quantum Chromodynamics and Particle Interactions
- Nuclear Physics and Applications
- Muon and positron interactions and applications
- Scientific Research and Discoveries
- Cold Atom Physics and Bose-Einstein Condensates
- Crystallography and Radiation Phenomena
- Black Holes and Theoretical Physics
- Laser-Plasma Interactions and Diagnostics
- Medical Imaging Techniques and Applications
- Gamma-ray bursts and supernovae
- Advanced Differential Equations and Dynamical Systems
European Organization for Nuclear Research
2015-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Bologna
1993-2024
Shanghai Jiao Tong University
2022
University of Pisa
2022
Johannes Gutenberg University Mainz
2022
Paul Scherrer Institute
2022
ETH Zurich
2022
Istituto Nazionale di Fisica Nucleare, Sezione di Pisa
2022
Brookhaven National Laboratory
2022
Institut de Recherche sur les Lois Fondamentales de l'Univers
2022
A bstract The OPERA neutrino experiment at the underground Gran Sasso Laboratory has measured velocity of neutrinos from CERN CNGS beam over a baseline about 730 km. measurement is based on data taken by in years 2009, 2010 and 2011. Dedicated upgrades timing system detector, as well high precision geodesy campaign for baseline, allowed reaching comparable systematic statistical accuracies. An arrival time muon with respect to one computed assuming speed light vacuum $ \left( {6.5\pm...
Abstract In circular particle accelerators, storage rings, or colliders, mitigating beam losses is critical to ensuring optimal performance, particularly for rings that include superconducting magnets. A thorough understanding of halo dynamics essential this purpose. This paper presents recent results the measurement nonlinear diffusion process at CERN Large Hadron Collider (LHC). The novel approach used in based on analytical framework Nekhoroshev theorem, which provides a functional form...
Recently, nonlinear effects have been used to cool a special beam represented by an annular distribution in 2D phase space. This outcome was accomplished using ac dipole combined with amplitude detuning generated static magnets. In this paper, we investigate more realistic scenario, which 4D space includes the presence of halo and demonstrate how latter can be removed effects. The proposed approach employs high-order magnets trap into resonances perform adiabatic transport Theoretical models...
Machine learning entails a broad range of techniques that have been widely used in Science and Engineering since decades. High-energy physics has also profited from the power these tools for advanced analysis colliders data. It is only up until recently Learning started to be applied successfully domain Accelerator Physics, which testified by intense efforts deployed this several laboratories worldwide. This case CERN, where focused devoted application beam dynamics studies at Large Hadron...
The electric dipole moments~(EDM) of fundamental particles inherently violate parity~(P) and time-reversal~(T) symmetries. By virtue the CPT theorem in quantum field theory, latter also implies violation combined charge-conjugation parity~(CP) symmetry. We aim to measure EDM muon using frozen-spin technique within a compact storage trap. This method exploits high effective field, \$E \approx 165\$ MV/m, experienced rest frame with momentum about 23 MeV/c when it passes through solenoidal...
The Large Hadron Collider (LHC) at CERN is built to collide intense proton beams with an unprecedented energy of 7 TeV. design stored per beam 362 MJ makes the LHC highly destructive, so that any losses risk cause quenches superconducting magnets or damage accelerator components. Collimators are installed protect machine and they define a minimum normalized aperture, below which no other element allowed. This imposes limit on achievable luminosity, since when squeezing β* (the β-function...
This letter of intent proposes an experiment to search for electric dipole moment the muon based on frozen-spin technique. We intend exploit high field, $E=1{\rm GV/m}$, experienced in rest frame with a momentum $p=125 {\rm MeV/}c$ when passing through large magnetic field $|\vec{B}|=3{\rm T}$. Current fluxes at $μ$E1 beam line permit improved sensitivity $σ(d_μ)\leq 6\times10^{-23}e{\rm cm}$, about three orders magnitude more than current upper limit $|d_μ|\leq1.8\times10^{-19}e{\rm...
A novel method for multiturn extraction from a circular particle accelerator is presented, based on trapping particles into islands of phase space generated by nonlinear resonances. By appropriate use sextupoles and octupoles, stable can be created at small amplitude in space. varying the linear tune, trapped inside these then transported towards higher amplitudes extraction. Results numerical simulations are discussed.
Optics stability during all phases of operation is crucial for the LHC. Tools and procedures have been developed rapid checks beta beating, dispersion, linear coupling, as well prompt optics corrections. Important errors different beam commissioning were observed locally corrected using segment-by-segment technique. The most relevant corrections at injection corroborated with dedicated magnetic measurements.
The upgrade of the Large Hadron Collider (LHC) collimation system includes additional collimators in LHC lattice. longitudinal space for these will be created by replacing some main dipoles with shorter but stronger compatible lattice and systems. project plan comprises construction two cryoassemblies containing each 11-T 5.5-m length possible installation on either side interaction point 2 years 2018-2019 ion operation, 7 2023-2024 proton operation. development program conducted conjunction...
Proton beams were successfully steered through the entire ring of CERN Large Hadron Collider (LHC) on September 10th 2008. A reasonable lifetime was achieved for counterclockwise beam, namely beam 2, after radiofrequency capture particle bunch established. This provided unique opportunity acquiring turn-by-turn betatron oscillations a maximum 90 turns right at injection. Transverse coupling not corrected and chromaticity estimated to be large. Despite this largely constrained scenario,...
A scaling law for the time dependence of dynamic aperture, i.e., region phase space where stable motion occurs, has been proposed in previous papers [M. Giovannozzi, W. Scandale, E. Todescoand , Part. Accel. 56, 195 (1996); M. and Todesco, Proceedings 1997 Particle Accelerator Conference, edited by Comyn, K. Craddock, Reiser, J. Thomson (IEEE Service Center, Piscataway, NJ, 1997), p. 1445; Phys. Rev. E 57, 3432 (1998)]. This law, based on analysis numerical simulations data, is not entirely...
A new extraction technique has been studied at the CERN Proton Synchrotron with a view of using it for fixed-target physics programme Super Synchrotron. The scheme is based on advanced concepts non-linear beam dynamics: prior to particle split into several beamlets in transverse plane by crossing stable resonance, which allows extracting over multiple turns. principle extraction, detail its implementation, and progress commissioning years are discussed here. More importantly, results...
Abstract At the Paul Scherrer Institut (PSI), we are developing a high-precision apparatus with aim of searching for muon electric dipole moment (EDM) unprecedented sensitivity. The underpinning principle this experiment is frozen-spin technique, method that suppresses spin precession due to anomalous magnetic moment, thereby enhancing signal-to-noise ratio EDM signals. This increased sensitivity enables measurements would be difficult achieve conventional $$g - 2$$ <mml:math...
The combined effect of space charge and nonlinear resonance on beam loss emittance was measured in a benchmarking experiment over 1.2 s long flat bottom at 1.4 GeV kinetic energy the presence single controllable octupole. By lowering working point towards resonance, gradual transition from loss-free core blowup to regime dominated by continuous found. We compare observation with 3D simulations based new analytical model obtain good agreement regime. Our explanation is terms synchrotron...
Trapping phenomena involving nonlinear resonances have been considered in the past framework of adiabatic theory. Several results are known for continuous-time dynamical systems generated by Hamiltonian flows which combined effect and slow time variation some system parameters is considered. The focus this paper on discrete-time two-dimensional symplectic maps. possibility extending neo-adiabatic theory to quasi-integrable area-preserving maps discussed. Scaling laws derived, describe...
Abstract The LHC@Home BOINC project has provided computing capacity for numerical simulations to researchers at CERN since 2004, and 2011 been expanded with a wider range of applications. traditional accelerator physics simulation code SixTrack enjoys continuing volunteers support, thanks virtualisation number applications from the LHC experiment collaborations particle theory groups have joined consolidated project. This paper addresses challenges related virtualized in environment, how...
With the progress made in 2015, beams produced by CERN Proton Synchrotron using multiturn extraction (MTE) have been delivered to Super (SPS) for fixed-target physics run. Operation successfully started second half of September 2015 and continued until end proton program mid November. In this paper overall performance beam quality is discussed detail considering complete chain accelerators, from PS-Booster SPS. Moreover, a thorough comparison global MTE scheme against previously used...
Abstract Electrons lenses produce a high-intensity electron beam and have variety of applications to circular hadron accelerators. Electron beams different transverse cross sections distributions may be designed, depending on the desired application, they are produced steered along orbit beam, overlapping with it for typical distances few meters before being deflected away disposed of. Hollow find collimation machines like CERN Large Hadron Collider (LHC). Such devices can integrated in...