A5004178128- Particle Accelerators and Free-Electron Lasers
- Particle accelerators and beam dynamics
- Gyrotron and Vacuum Electronics Research
- Particle physics theoretical and experimental studies
- Superconducting Materials and Applications
- Microwave Engineering and Waveguides
- Laser-Plasma Interactions and Diagnostics
- Antenna Design and Analysis
- Plasma Diagnostics and Applications
- Distributed and Parallel Computing Systems
- Copper Interconnects and Reliability
- Innovative Microfluidic and Catalytic Techniques Innovation
- Microfluidic and Capillary Electrophoresis Applications
- Power Line Communications and Noise
- Advanced X-ray Imaging Techniques
- Semiconductor materials and devices
- Energy Harvesting in Wireless Networks
- Advanced Antenna and Metasurface Technologies
- Electromagnetic Launch and Propulsion Technology
- Advanced optical system design
- Scientific Computing and Data Management
- Astrophysics and Cosmic Phenomena
- Wireless Body Area Networks
- Network Time Synchronization Technologies
- Plasma Applications and Diagnostics
University of Catania
2015-2023
Sapienza University of Rome
2017-2021
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali di Frascati
2016-2020
Istituto Nazionale di Fisica Nucleare
2017-2020
Istituto Nazionale di Fisica Nucleare, Sezione di Roma I
2019
European Organization for Nuclear Research
2018
Hebrew University of Jerusalem
2017
University of Rome Tor Vergata
2017
Istituto Nazionale di Fisica Nucleare, Sezione di Milano
2017
Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud
2016
On the wake of results obtained so far at SPARC_LAB test-facility Laboratori Nazionali di Frascati (Italy), we are currently investigating possibility to design and build a new multi-disciplinary user-facility, equipped with soft X-ray Free Electron Laser (FEL) driven by ∼1 GeV high brightness linac based on plasma accelerator modules. This study is performed in synergy EuPRAXIA study. In this paper report about recent progresses going facility.
In this article, we describe an embedded circularly polarized patch antenna for the batteryless sensor monitoring of concrete structures. particular, focus our effort on designing a that is able to work in and has different dielectric properties without changing input impedance achieve optimal power transfer. The designed optimized by exploiting analytical model suitably customized case at hand full-wave numerical analysis. achieved results give physical insights into performance explain its...
The active plasma lens represents a compact and affordable tool with radially symmetric focusing field gradients up to several kT/m. In order be used as device, its effects on the particle beam distribution must well characterized. Here, we present experimental results obtained by an high-brightness electron means of 3 cm-long discharge-capillary pre-filled Hydrogen gas. We achieved minimum spot sizes 24 μm (rms) showing that, during lensing, emittance increases due nonlinearities in field....
Plasma-based technology promises a tremendous reduction in size of accelerators used for research, medical, and industrial applications, making it possible to develop tabletop machines accessible broader scientific community. By overcoming current limits conventional pushing particles larger energies, the availability strong tunable focusing optics is mandatory also because plasma-accelerated beams usually have large angular divergences. In this regard, active-plasma lenses represent compact...
The generation of ultra-short electron bunches with ultra-low timing-jitter relative to the photo-cathode (PC) laser has been experimentally proved for first time at SPARC_LAB test-facility (INFN-LNF, Frascati) exploiting a two-stage hybrid compression scheme. stage employs RF-based (velocity-bunching), which shortens bunch and imprints an energy chirp on it. second is performed in non-isochronous dogleg line, where completed resulting final duration below 90 fs (rms). At same time, beam...
The Linac for Image Guided Hadron Therapy (LIGHT) system has been developed as the first commercial high-frequency linac-based proton therapy accelerator system. As part of development process and technical validation concept, a reduced energy prototype linac (including all key functional aspects full accelerator) designed tested in parallel with preparation work full-scale LIGHT construction, installation, commissioning beam allowed identification gaps design improvements before transfer to...
Recent investigations of RF copper structures operated at cryogenic temperatures performed by a SLAC-UCLA collaboration have shown dramatic increase in the maximum surface electric field, to 500 MV/m. We examine use these fields enable very high field photoinjectors that can attain over an order magnitude peak electron beam brightness. present dynamics studies relevant X-ray FEL injectors, using start-to-end simulations show brightness and low emittance this source enables operation compact...
The Future Circular Collider FCC-ee is a study toward high luminosity electron-positron collider with centre-of-mass energy from 91 GeV to 365 GeV. Due the beam parameters and pipe dimensions, collective effects electron cloud can be very critical aspects for machine represent main limitations its performance. An estimation of build up in components an impedance model are required analyze induced instabilities find solutions their mitigation. Special attention has been given resistive wall...
ABSTRACT In this letter the effects of a lossy background on an antenna for wireless embedded sensors network has been studied. The efficiency versus concrete structure size decreases from 72% down to ∼20%. However, it is shown that boresight gain essentially unaffected by block size. proposed configuration robust against permittivity variations, change in dimension and presence rebars. © 2016 Wiley Periodicals, Inc. Microwave Opt Technol Lett 58:2653–2656,
The versatile ion source is an off-resonance microwave discharge which produces a slightly overdense plasma at 2.45 GHz of pumping wave frequency extracting more than 60 mA proton beams and 50 He+ beams. DAEδALUS IsoDAR experiments require high intensities for H2+ to be accelerated by power cyclotrons neutrinos generation. In order fulfill the new requirements, chamber injection system has been designed manufactured increasing beam intensity. this paper studies H2+/p ratio design will shown...
Technological activities to design, manufacture, and test new accelerating devices using different materials methods is under way all over the world. The main goal of these studies increase gradients reduce probability radio-frequency (RF) breakdown. Indeed, it still not clear why, by increasing intensity applied field, intense surface damage observed in copper structures, limiting lifetime and, therefore, practical applications. A possible solution represented a coating relatively thick...
An innovative approach for the fabrication of low-threshold, nanoscale field-emitter cathodes and arrays is proposed. By shaping a titanium cathode as dovetail geometry using thin vertical wall high-permittivity dielectric, Si <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> N xmlns:xlink="http://www.w3.org/1999/xlink">4</sub> , to isolate tip from gate, electric field intensity near edges strongly increased, turn-ON voltage in range few...
$C$-band technology is emerging as an exciting innovative approach to the creation of compact new accelerators. Besides possibility sustain higher gradients and repetition rate operation at normal conducting temperature, it also allows one increase machine performance in terms beam brightness. We propose design study a conducting, high gradient injector aiming production brightness electron beams---up $2.6\ifmmode\times\else\texttimes\fi{}{10}^{3}\text{ }\text{...
Plasma wake-field acceleration experiments are performed at the SPARC LAB test facility by using a gas-filled capillary plasma source composed of dielectric capillary. The electron can reach GeV energy in few centimeters, with an accelerating gradient orders magnitude larger than provided conventional techniques. In this scheme, wake fields produced passing beams through structures determine strong beam instability that represents important hurdle towards capability to focus high-current...
This paper presents a novel numerical approach to simulate H-plane rectangular-waveguide microwave circuits considering reduced quasi-2D simulation domain with benefits for computational cost and time. With the aim evaluate attenuation of full height 3D component, we propose modified expression waveguide top/bottom wall conductivity. Numerical 2D simulations are validated against results from wave 3-D commercial electromagnetic simulator. After benchmark on simple straight model, method has...
A simple analytic model based on the equations of propagation matrices theory has been developed in order to evaluate effective skin depth coated metallic surfaces. With particular attention R&D highly-performing accelerating structures, different thick coatings with excellent mechanical and electrical properties have considered such as molybdenum its oxides, p-doped SiC, TiN. Calculations show that copper a p-type SiC may exhibit an improved hardness higher thermal resistance. Combined...
A new method able to transport charged particle beams along a curved path is presented. It based on capillary-discharge waveguides where the induced azimuthal magnetic field used focus beam and, at same time, keep it close capillary axis. We show that such solution highly tunable, allows develop compact structures providing large deflecting angles unlike conventional solutions bending magnets, preserves longitudinal phase space. Such feature, in particular, very promising when dealing with...