A5058528326- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Superconducting Materials and Applications
- Particle Detector Development and Performance
- Gyrotron and Vacuum Electronics Research
- Particle physics theoretical and experimental studies
- High-Energy Particle Collisions Research
- Advanced X-ray Imaging Techniques
- Electromagnetic Simulation and Numerical Methods
- Electrostatic Discharge in Electronics
- X-ray Spectroscopy and Fluorescence Analysis
- Engineering Applied Research
- Radiation Effects in Electronics
- Crystallography and Radiation Phenomena
- Advanced Fiber Optic Sensors
- Photonic and Optical Devices
- Electromagnetic Compatibility and Noise Suppression
- Radiation Therapy and Dosimetry
- Graphite, nuclear technology, radiation studies
- Magnetic confinement fusion research
- Calibration and Measurement Techniques
- Distributed and Parallel Computing Systems
- Fusion materials and technologies
- Photonic Crystal and Fiber Optics
- Advanced Electrical Measurement Techniques
European Organization for Nuclear Research
2015-2024
Universidad de Granada
2021
High Energy Accelerator Research Organization
2021
Paul Scherrer Institute
2021
Japan Proton Accelerator Research Complex
2021
Federico II University Hospital
2021
Institute of Electrical and Electronics Engineers
2021
University of Catania
2021
Sapienza University of Rome
2016
École Polytechnique Fédérale de Lausanne
2007-2009
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...
Beam instabilities cover a wide range of effects in particle accelerators and they have been the subjects intense research for several decades. As machines performance was pushed new mechanisms were revealed nowadays challenge consists studying interplays between all these intricate phenomena, as it is very often not possible to treat different separately. The aim this paper review main mechanisms, discussing particular recent developments beam instability theories simulations.
Since 2015 the LHC has been operating at 6.5 TeV. In 2016 β-functions interaction points of ATLAS and CMS were squeezed to 0.4 m. This is below design β*=0.55 m 7 TeV, instrumental surpass luminosity 1034 cm−2 s−1. Achieving a lower than nominal β* possible thanks extraordinary performance LHC, in which control optics played fundamental role. Even though β-beating for virgin machine was above 100%, corrections reduced rms 1% two main experiments 2% around ring. guarantees safe operation as...
A setup of two bent crystals and a fixed target in the CERN Large Hadron Collider (LHC) could enable study magnetic (MDM) electric (EDM) dipole moments short-lived charm baryons with unprecedented accuracy. At core experiment is crystal which particles interest, such as $\Lambda_c^+$ $\Xi_c^+$ particles, can be confined between crystalline planes, inducing deflection that enforces spin precession measurable by detectors. The requires inside LHC vacuum to create charmed baryons. first serves...
During the third run of Large Hadron Collider in 2023, which had highest intensity bunch population compared to previous runs, a beam dump incident with operational delays occurred due increased losses attributed pressure spikes within warm vacuum sector. Subsequent inspections revealed localized annealing and plasticization tension spring sliding contact radio frequency finger 212 mm diameter module, alongside traces vapor deposition on various module components stainless steel material. A...
The Large Hadron Collider (LHC) is one of the largest scientific instruments ever built. Since opening up a new energy frontier for exploration in 2010, it has gathered global user community working fundamental particle physics and hadronic matter at extreme temperature density. To sustain extend its discovery potential, LHC will undergo major upgrade 2020s. This increase rate collisions by factor five beyond original design value integrated luminosity ten. configuration, known as High...
The i-pipe system is a peculiar structural health monitoring system, based on Fiber Bragg Grating technology, installed the central beam pipe of compact Muon solenoid (CMS) experiment at CERN. In this contribution, temperature sensors, originally conceived as thermal compensator for strain are employed to monitor behavior in correlation with parameters particle travelling inside, order directly measure possible Beam RF induced heating effect. turned out be capable monitoring, and without...
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...
In the field of accelerator physics it is crucial to account for heating caused by passage high intensity beams into components. This phenomenon known as Radio Frequency (RF) Beam Induced Heating (BIH) and requires, other than an accurate design stage, constantly monitor temperature-related parameters during operations. enables warn critical malfunctions prevent possible damages. Monitoring needs meet various requirements, such multiplexing capabilities, distributed sensing possibilities,...
The High-Luminosity Large Hadron Collider (HL-LHC) project aims at extending the operability of LHC by another decade and increasing more than a factor ten integrated luminosity that will have collected end Run 3. This require doubling beam intensity reducing transverse size compared to those design. higher brightness poses new challenges for machine safety, due large energy 700 MJ stored in beams, stability, mainly collimator contribution total coupling impedance. A rich research program...
The electron cloud (EC) can be formed in the beam pipe of a circular accelerator if secondary emission yield (SEY) inner surface is larger than 1, and it detrimentally affect circulating beam. Understanding underlying physics defining scaling laws this effect indispensable to steer upgrade plans existing machines design new ones. single bunch EC instability (ECI) shown strongly affected by transverse size. Transversely, smaller beams going through an generate higher peak densities lower...
Upgrades of the CERN particle accelerators complex are planned to increase potential physics discovery in LHC. In this respect, beam coupling impedances SPS and LHC expected be among limitations intensity upgrade scheme. thesis work, we present a general framework better understand impedance accelerator. first step, single components gathered into an model accounting for whole machine. order assess relevance model, its impact on dynamics is simulated can compared observables measured with...
The prediction of the transverse wall beam impedance at first unstable betatron line (8 kHz) CERN Large Hadron Collider (LHC) is paramount importance for understanding and controlling related coupled-bunch instabilities. Until now only novel analytical formulas were available this frequency. Recently, laboratory measurements numerical simulations performed to cross-check predictions. experimental results based on measurement variation a probe coil inductance in presence (i) sample graphite...
The transverse impedance in the LHC is expected to be dominated by numerous collimators, most of which are made Fibre-Reinforced-Carbon withstand impacts high intensity proton beams case failures, and will moved very close beam, with full gaps few millimetres, order protect surrounding super-conducting equipments. We present an estimate resistive-wall total at injection top energy, induced coupled-bunch growth rates tune shifts, finally result comparison theoretical predictions measurements...
Beam coupling impedance is a fundamental parameter to characterize the electromagnetic interaction of particle beam with surrounding environment. Synchrotron machine performances are critically affected by instabilities and collective effects triggered impedance. In particular, transverse expected impact dynamics CERN Proton (PS), since significant increase in intensity foreseen within framework LHC Injectors Upgrade (LIU) project. this paper we describe study PS, taking into account main...
The resistive-wall impedance of cylindrical vacuum chambers was first calculated more than forty years ago under some approximations. Since then many papers have been published to extend its range validity. In the last few years, interest in this subject has again revived for LHC graphite collimators, which a new physical regime is predicted. unstable betatron line at 8 kHz, where skin depth 1.8 cm, smaller collimator thickness 2.5 cm. Hence one could think that resistive thick-wall formula...
In the frame of FCC study we are designing a 27 TeV hadron collider in LHC tunnel, called High Energy (HE-LHC). The HE-LHC can be realized by replacing LHC's 8.33 T niobium-titanium dipole magnets with 16 niobium-tin developed for FCC-hh. A high-quality beam available from upgraded injector complex and significant radiation damping allow achieving challenging target values both peak integrated luminosity required particle physics. Tunnel integration determines maximum outer size magnet...