S. Mazzoni
A5087495818- Particle Accelerators and Free-Electron Lasers
- Laser-Plasma Interactions and Diagnostics
- Particle Detector Development and Performance
- Particle accelerators and beam dynamics
- Advanced X-ray Imaging Techniques
- Radiation Detection and Scintillator Technologies
- Magnetic confinement fusion research
- Advanced Thermodynamics and Statistical Mechanics
- Superconducting Materials and Applications
- Gyrotron and Vacuum Electronics Research
- Field-Flow Fractionation Techniques
- Nuclear Physics and Applications
- Crystallography and Radiation Phenomena
- Particle physics theoretical and experimental studies
- Atomic and Molecular Physics
- Medical Imaging Techniques and Applications
- X-ray Spectroscopy and Fluorescence Analysis
- Phase Equilibria and Thermodynamics
- Planetary Science and Exploration
- Pulsed Power Technology Applications
- Electron and X-Ray Spectroscopy Techniques
- Advanced Electron Microscopy Techniques and Applications
- Radiation Therapy and Dosimetry
- Advanced Optical Sensing Technologies
- Spaceflight effects on biology
European Organization for Nuclear Research
2015-2024
Campbell Collaboration
2020-2022
University of Liverpool
2022
Cockcroft Institute
2022
University of Milan
2004-2019
Google (United States)
2019
Diamond Light Source
2018
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2017
University College London
2016
European Space Research and Technology Centre
2008-2013
High energy particle accelerators have been crucial in providing a deeper understanding of fundamental particles and the forces that govern their interactions. In order to increase or reduce size accelerator, new acceleration schemes need be developed. Plasma wakefield acceleration, which electrons plasma are excited, leading strong electric fields, is one such promising novel technique. Pioneering experiments shown an intense laser pulse electron bunch traversing plasma, drives fields 10s...
Riboli, A, Nardi, F, Osti, M, Cefis, Tesoro, G, and Mazzoni, S. Training load, official match locomotor demand, their association in top-class soccer players during a full competitive season. J Strength Cond Res 39(2): 249-259, 2025-To examine training load demands of season to evaluate association. Twenty-five competing UEFA international competitions were included. The was divided into 2 different categories: matches (M2) or 3 (M3) 8 days. Starters nonstarters classified. Total distance...
The Advanced Proton Driven Plasma Wakefield Acceleration Experiment (AWAKE) aims at studying plasma wakefield generation and electron acceleration driven by proton bunches. It is a proof-of-principle R&D experiment CERN the world׳s first experiment. AWAKE will be installed in former CNGS facility uses 400 GeV/c beam bunches from SPS. experiments focus on self-modulation instability of long (rms ~12 cm) bunch plasma. These are planned for end 2016. Later, 2017/2018, low energy (~15 MeV)...
Spatial scale invariance represents a remarkable feature of natural phenomena. A ubiquitous example is represented by miscible liquid phases undergoing diffusion. Theory and simulations predict that in the absence gravity diffusion characterized long-ranged algebraic correlations. Experimental evidence generated has been limited, because on Earth development long-range correlations suppressed gravity. Here we report experimental results obtained microgravity during flight FOTON M3 satellite....
We give direct experimental evidence for the observation of full transverse self-modulation a long, relativistic proton bunch propagating through dense plasma. The exits plasma with periodic density modulation resulting from radial wakefield effects. show that is seeded by ionization front created using an intense laser pulse copropagating bunch. extends over length following seed point. By varying one order magnitude, we frequency scales expected dependence on density, i.e., it equal to...
The seeded self-modulation of a relativistic, charged particle bunch in plasma is shown to grow both along the and plasma, resulting transverse wakefield amplitudes that far exceed initial seed values.
We show in experiments that a long, underdense, relativistic proton bunch propagating plasma undergoes the oblique instability, which we observe as filamentation. determine threshold value for ratio between transverse size and skin depth instability to occur. At threshold, outcome of experiment alternates filamentation self-modulation (evidenced by longitudinal modulation into microbunches). Time-resolved images density distribution reveal grows an observable level late along bunch,...
AWAKE is a proton-driven plasma wakefield acceleration experiment. % We show that the experimental setup briefly described here ready for systematic study of seeded self-modulation 400\,GeV proton bunch in 10\,m-long rubidium with density adjustable from 1 to 10$\times10^{14}$\,cm$^{-3}$. short laser pulse used ionization vapor propagates all way along column, suggesting full vapor. occurs bunch, at time and follows affects bunch.
Plasma wakefield acceleration is a promising technology to reduce the size of particle accelerators. The use high energy protons drive wakefields in plasma has been demonstrated during Run 1 AWAKE programme at CERN. Protons 400 GeV drove that accelerated electrons 2 under 10 m plasma. collaboration now embarking on with main aims demonstrate stable accelerating gradients 0.5–1 GV/m, preserve emittance electron bunches and develop sources scalable 100s metres beyond. By end 2, scheme should...
Experimental results show that hosing of a long particle bunch in plasma can be induced by wakefields driven short, misaligned preceding bunch. Hosing develops the plane misalignment, self-modulation perpendicular plane, at frequencies close to electron frequency, and are reproducible. Development depends on misalignment direction, its growth extent proton charge. Results have main characteristics theoretical model, relevant other plasma-based accelerators represent first characterization...
This paper presents the design and experimental commissioning of a noninvasive electron bunch length monitor based on detection coherent Cherenkov diffraction radiation (ChDR). The measurement technique effectively eliminates influence bunch-by-bunch charge fluctuations, as each detector measures signal from same while mitigating impact position jitter measurements, providing potential real-time diagnostic tool with significant operational advantages. sensitivity measurements to both...
By using the critical Casimir force, we study attractive strength dependent aggregation of colloids with and without gravity by means near field scattering. Significant differences were seen between microgravity ground experiments, both in structure formed fractal aggregates as well kinetics growth. In purely diffusive is observed. continuously variable particle interaction potential can for first time experimentally relate attraction particles aggregates.
We report data for nonequilibrium density fluctuations in a layer of liquid CS(2) subjected to temperature gradients on Earth and satellite. The structure factor S(q) was measured using calibrated shadowgraph. Upon removing gravity, increased dramatically at small wave vector, until the generated by thermal noise were limited only 3 mm sample thickness. results agree with theory within few percent are ∼14% below microgravity, demonstrating that use equilibrium Langevin forces is appropriate...
A long, narrow, relativistic charged particle bunch propagating in plasma is subject to the self-modulation (SM) instability. We show that SM of a proton can be seeded by wakefields driven preceding electron bunch. timing reproducibility and control are at level small fraction modulation period. With this seeding method, we independently amplitude seed with charge growth rate Seeding leads larger than instability case.
verybody is familiar with the action of gravity on a fluid where density gradients are present due to heating or compositional difference.Due buoyancy, denser portions sink bottom container, pushing away lighter ones.As result, convection sets in, transporting heat and mass.In weightlessness conditions, this driving force absent but inertia exists as tendency body resist acceleration.When container filled liquid subjected high frequency vibrations, not able react may create flow.If uniform,...
We report on the observation of incoherent Cherenkov radiation emitted by a 5.3 GeV positron beam circulating in Cornell electron-positron storage ring as passes close vicinity surface fused silica radiator (i.e., at distance larger than 0.8 mm). The shape was designed order to send photons towards detector, consisting compact optical system equipped with an intensified camera. allows both measurements 2D images and angular distribution including polarization study. corresponding light...
We use a relativistic ionization front to provide various initial transverse wakefield amplitudes for the self-modulation of long proton bunch in plasma. show experimentally that, with sufficient amplitude [$\ensuremath{\ge}(4.1\ifmmode\pm\else\textpm\fi{}0.4)\text{ }\text{ }\mathrm{MV}/\mathrm{m}$], phase modulation along is reproducible from event event, 3%--7% (of $2\ensuremath{\pi}$) rms variations all bunch. The not lower amplitudes. observe transition between these two regimes. Phase...
We investigate the early stages of mass convection in a colloidal suspension at high solutal Rayleigh number Ras. From time evolution shadowgraph images and by assuming diffusive growth boundary layers we obtain an indirect measurement concentration layer thickness delta* onset convection. show that dimensionless delta=delta*/d scales as Ra-ps, where Ras=Rasdelta is modified for which accounts actual density unbalance d sample layer. This scaling behavior analogous to reported steady state...
Microgravity research in space is a complex activity where the often scarce resources available for launch, accommodation, and operation of instrumentation call careful experiment planning instrument development. In this paper we describe module Selectable Optical Diagnostic Instrument, that has been designed as compact optical diagnostic colloidal physics experiments. The peculiarity combination novel light scattering technique known near field standard microscopy with low-coherence laser...
In recent years, there has been an increasing demand for noninvasive beam size monitoring on particle accelerators. Ideally, these monitors should be cost effective and require little or no maintenance. These also suitable both linear circular machines. Here, the experimental setup is described in detail, results from a diffraction radiation monitor are presented. This tested Cornell Electron Storage Ring using 1 mA ($1.6\ifmmode\times\else\texttimes\fi{}{10}^{10}$ particles per bunch)...
We present the observation and detailed investigation of coherent Cherenkov diffraction radiation (CChDR) in terms spectral-angular characteristics. Electromagnetic simulations have been performed to optimize design a prismatic dielectric radiator performance detection system with aim providing longitudinal beam diagnostics. Successful experimental validations organized on CLEAR CLARA facilities based at CERN Daresbury laboratory respectively. With ps sub-ps long electron bunches, emitted...
A minimally invasive transverse beam profile monitor based on supersonic gas curtain technology and beam-induced fluorescence has been developed demonstrated. The concept presented can be used to measure both the of proton in Large Hadron Collider (LHC) concentricity electron beams LHC hollow lens. In this Letter, performance such a for low energy is discussed, which paves way its wider implementation.